Science Publishing Group: American Journal of Electrical Power and Energy Systems: Table of Contents
<i> American Journal of Electrical Power and Energy Systems (EPES) </i> is dedicated to providing a multidisciplinary platform for the discussion of issues arising in energy research without the constraints imposed by aiming at a restricted audience. It aims to promote rapid communication and dialogue among the researchers, scientists, engineers and policy makers working in the areas of Electrical Power and Energy Systems in the world. EPES welcomes the following tier 1 article types: Book Review, Editorial, General Commentary, Hypothesis & Theory, Methods, Mini Review, Opinion, Original Research, Perspective, Review, Specialty Grand Challenge and Technology Report.
http://www.sciencepublishinggroup.com/j/epes Science Publishing Group: American Journal of Electrical Power and Energy Systems: Table of Contents
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American Journal of Electrical Power and Energy Systems
American Journal of Electrical Power and Energy Systems
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SPV based water pumping system for an academic institution
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20120101.11
This paper presents the water pumping system based on solar photovoltaic (SPV) to cater the need of water in an academic institution for various applications like irrigation, drinking, washing etc. In this paper a case study of Faculty of Engineering and Technology (FET), Jamia Millia Islamia, New Delhi, India is carried out. Presently water is pumped with the help of grid power supply resulting huge energy consumption. As solar water pumping has several advantages over conventional water pumping systems, apart from economical advantages, therefore an attempt has been made to develop SPV based water pumping system to meet daily water needs of the institute. A techno-economic analysis of SPV based water pumping system and comparison of proposed system with the conventional one is also discussed in this work.
This paper presents the water pumping system based on solar photovoltaic (SPV) to cater the need of water in an academic institution for various applications like irrigation, drinking, washing etc. In this paper a case study of Faculty of Engineering and Technology (FET), Jamia Millia Islamia, New Delhi, India is carried out. Presently water is pumped with the help of grid power supply resulting huge energy consumption. As solar water pumping has several advantages over conventional water pumping systems, apart from economical advantages, therefore an attempt has been made to develop SPV based water pumping system to meet daily water needs of the institute. A techno-economic analysis of SPV based water pumping system and comparison of proposed system with the conventional one is also discussed in this work.
SPV based water pumping system for an academic institution
doi:10.11648/j.epes.20120101.11
American Journal of Electrical Power and Energy Systems
2014-01-01
© Science Publishing Group
Majid Jamil
Ahmed Sharique Anees
M. Rizwan
SPV based water pumping system for an academic institution
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© Science Publishing Group
Electrical Network Reduction for Load Flow and Short-Circuit Calculations Using Power Factory Software
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The primary purpose in constructing equivalents is to represent a portion of a network containing many buses but having only a few "boundary buses" by a reduced network containing only the boundary buses and, perhaps, a few selected buses from within the original sub-network. The equivalent constructed gives an exact reproduction of the self and transfer impedances of the external system as seen from its boundary buses. PowerFactory’s network reduction algorithm produces an equivalent representation of the reduced part of the network and calculates its parameters. This equivalent re-presentation is valid for both load flow and short-circuit calculations, including asymmetrical faults (that is, single-phase faults).
The primary purpose in constructing equivalents is to represent a portion of a network containing many buses but having only a few "boundary buses" by a reduced network containing only the boundary buses and, perhaps, a few selected buses from within the original sub-network. The equivalent constructed gives an exact reproduction of the self and transfer impedances of the external system as seen from its boundary buses. PowerFactory’s network reduction algorithm produces an equivalent representation of the reduced part of the network and calculates its parameters. This equivalent re-presentation is valid for both load flow and short-circuit calculations, including asymmetrical faults (that is, single-phase faults).
Electrical Network Reduction for Load Flow and Short-Circuit Calculations Using Power Factory Software
doi:10.11648/j.epes.20130201.11
American Journal of Electrical Power and Energy Systems
2014-01-01
© Science Publishing Group
Funso K. Ariyo
Electrical Network Reduction for Load Flow and Short-Circuit Calculations Using Power Factory Software
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© Science Publishing Group
Investigation of Nigerian 330 Kv Electrical Network with Distributed Generation Penetration – Part III: Deterministic and Probabilistic Analyses.
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The concluding part of this work (Part III) presents the non-probabilistic (deterministic) assessment of failure effects under given contingencies and reliability analysis is an automation and probabilistic extension of contingency evaluation. Also, PowerFactory generation adequacy tool is design specifically for testing of system adequacy using Monte-Carlo method. Running adequacy analysis produces convergence plots, distribution plots and Monte-Carlo draw plots. PowerFactory’s contingency analysis module offers two distinct contingency analysis methods: single time phase and multiple time phase contingency analysis, while an analytical assessment of the network reliability indices is initiated by the following actions (failure modeling, load modeling, system state production, failure effect analysis (FEA), statistical analysis and reporting) within PowerFactory. Lastly, voltage sag analysis is a calculation that assesses the expected frequency of voltage sags within a network.
The concluding part of this work (Part III) presents the non-probabilistic (deterministic) assessment of failure effects under given contingencies and reliability analysis is an automation and probabilistic extension of contingency evaluation. Also, PowerFactory generation adequacy tool is design specifically for testing of system adequacy using Monte-Carlo method. Running adequacy analysis produces convergence plots, distribution plots and Monte-Carlo draw plots. PowerFactory’s contingency analysis module offers two distinct contingency analysis methods: single time phase and multiple time phase contingency analysis, while an analytical assessment of the network reliability indices is initiated by the following actions (failure modeling, load modeling, system state production, failure effect analysis (FEA), statistical analysis and reporting) within PowerFactory. Lastly, voltage sag analysis is a calculation that assesses the expected frequency of voltage sags within a network.
Investigation of Nigerian 330 Kv Electrical Network with Distributed Generation Penetration – Part III: Deterministic and Probabilistic Analyses.
doi:10.11648/j.epes.20130201.12
American Journal of Electrical Power and Energy Systems
2014-01-01
© Science Publishing Group
Funso K. Ariyo
Investigation of Nigerian 330 Kv Electrical Network with Distributed Generation Penetration – Part III: Deterministic and Probabilistic Analyses.
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http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20130201.12
© Science Publishing Group
The Current Status of Wind and Tidal in-Stream Electric Energy Resources
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20130202.11
Renewable energy is an effective and clean source of supplying electrical loads especially in remote and rural areas. In this paper we discuss offshore wind and tidal in-stream energy as they rely on similar technologies for generating electricity at offshore sites. In particular, we survey the impacts of offshore wind and tidal current integration into the grid, various types of generators and their dynamic modeling, fault ride-through techniques used to improve generator and grid integration performance, the aggregated wind turbines modeling and finally put the light on the stability and control prob-lems.
Renewable energy is an effective and clean source of supplying electrical loads especially in remote and rural areas. In this paper we discuss offshore wind and tidal in-stream energy as they rely on similar technologies for generating electricity at offshore sites. In particular, we survey the impacts of offshore wind and tidal current integration into the grid, various types of generators and their dynamic modeling, fault ride-through techniques used to improve generator and grid integration performance, the aggregated wind turbines modeling and finally put the light on the stability and control prob-lems.
The Current Status of Wind and Tidal in-Stream Electric Energy Resources
doi:10.11648/j.epes.20130202.11
American Journal of Electrical Power and Energy Systems
2014-01-01
© Science Publishing Group
Hamed H. H. Aly
M. E. El-Hawary
The Current Status of Wind and Tidal in-Stream Electric Energy Resources
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© Science Publishing Group
Application of STATCOM to Increase Transient Stability of Wind Farm
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20130202.14
In this paper we interested to the study the necessary of Facts to increase the transient stability on the presence of faults and the integration of new renewable source, like wind energy, these lasts make the electrical grid operate in a new conditions, the STATCOM is one of the important Facts element, It provides the desired reactive-power generation and absorption entirely by means of electronic processing of the voltage and current waveforms in a voltage source converter (VSC). This function is identical to the synchronous condenser with rotating mass. In present work we propose a transient stability improvement using STATCOM under faults, in the first time we study the transient stability with and without STATCOM for clearly his advantages. In the second time we know the relation between the reactive power injecting by a STATCOM and the critical clearing time, some simulation results are given, commented and discussed.
In this paper we interested to the study the necessary of Facts to increase the transient stability on the presence of faults and the integration of new renewable source, like wind energy, these lasts make the electrical grid operate in a new conditions, the STATCOM is one of the important Facts element, It provides the desired reactive-power generation and absorption entirely by means of electronic processing of the voltage and current waveforms in a voltage source converter (VSC). This function is identical to the synchronous condenser with rotating mass. In present work we propose a transient stability improvement using STATCOM under faults, in the first time we study the transient stability with and without STATCOM for clearly his advantages. In the second time we know the relation between the reactive power injecting by a STATCOM and the critical clearing time, some simulation results are given, commented and discussed.
Application of STATCOM to Increase Transient Stability of Wind Farm
doi:10.11648/j.epes.20130202.14
American Journal of Electrical Power and Energy Systems
2014-01-01
© Science Publishing Group
Bouhadouza Boubekeur
Ahmed Gherbi
Hacene Mellah
Application of STATCOM to Increase Transient Stability of Wind Farm
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© Science Publishing Group
Analysis and Development of “Hybrid” Manual and Solar PV Based Power Generation System
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20130202.13
This paper presents the analysis & development of hybrid Manual and Solar PV Based Power Generation System as there is a requirement to supply the rural areas of India and other developing countries with reliable electricity. Most of the rural areas won’t have access to reliable electrical power even in the next ten years. Therefore alternate means of generating electrical energy will have to be utilized at local level. One such alternative is to produce electrical energy using hybrid systems utilizing manpower and solar energy. Local institutions like Panchayats might play an important role in the implementation, operation and maintenance of the proposed power generation system. The unregulated voltage generated by the proposed power generation system has been regulated with the help of electronic circuits.
This paper presents the analysis & development of hybrid Manual and Solar PV Based Power Generation System as there is a requirement to supply the rural areas of India and other developing countries with reliable electricity. Most of the rural areas won’t have access to reliable electrical power even in the next ten years. Therefore alternate means of generating electrical energy will have to be utilized at local level. One such alternative is to produce electrical energy using hybrid systems utilizing manpower and solar energy. Local institutions like Panchayats might play an important role in the implementation, operation and maintenance of the proposed power generation system. The unregulated voltage generated by the proposed power generation system has been regulated with the help of electronic circuits.
Analysis and Development of “Hybrid” Manual and Solar PV Based Power Generation System
doi:10.11648/j.epes.20130202.13
American Journal of Electrical Power and Energy Systems
2014-01-01
© Science Publishing Group
Mohd. Tariq
Khyzer Shamsi
Tabrez Akhtar
Analysis and Development of “Hybrid” Manual and Solar PV Based Power Generation System
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© Science Publishing Group
Effective Battery Charging System by Solar Energy Using C Programming and Microcontroller
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20130202.12
Energy is one of the issues that is causing the most controversy as fossil fuels are the greatest pollutants and the greatest contributors to the greenhouse effect .The increasing importance of environmental concern, fuel savings and unavailability of power has led to the renewal of interest in renewable energies. It therefore stands to reason that developing countries whose energy consumption rate is increasing at a very fast rate should be investigating new energy systems based on renewable energies that do not pollute and which are inexhaustible such as the Solar system. In this paper a simple, reliable and effective solar panel charging system has been introduced consisting of a solar panel of desired size and shape. This solar panel is integrated with an embedded system ( which contains three modules i.e. dc to ac converter, microcontroller/compiler module and charging output and a battery system).This embedded system regulates the electricity produced (after being converted to ac from dc) between the storage battery and charging output with the help of microcontroller which is programmed to combat the situations in presence and in absence of input supply and able to supply stored energy at night or in unavailability of solar source.
Energy is one of the issues that is causing the most controversy as fossil fuels are the greatest pollutants and the greatest contributors to the greenhouse effect .The increasing importance of environmental concern, fuel savings and unavailability of power has led to the renewal of interest in renewable energies. It therefore stands to reason that developing countries whose energy consumption rate is increasing at a very fast rate should be investigating new energy systems based on renewable energies that do not pollute and which are inexhaustible such as the Solar system. In this paper a simple, reliable and effective solar panel charging system has been introduced consisting of a solar panel of desired size and shape. This solar panel is integrated with an embedded system ( which contains three modules i.e. dc to ac converter, microcontroller/compiler module and charging output and a battery system).This embedded system regulates the electricity produced (after being converted to ac from dc) between the storage battery and charging output with the help of microcontroller which is programmed to combat the situations in presence and in absence of input supply and able to supply stored energy at night or in unavailability of solar source.
Effective Battery Charging System by Solar Energy Using C Programming and Microcontroller
doi:10.11648/j.epes.20130202.12
American Journal of Electrical Power and Energy Systems
2014-01-01
© Science Publishing Group
Mohd Tariq
Sagar Bhardwaj
Mohd Rashid
Effective Battery Charging System by Solar Energy Using C Programming and Microcontroller
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© Science Publishing Group
A Test for Solid Phase Extracted Polychlorinated Biphenyls (PCBs) Levels in Transformer Oil
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20130203.11
Polychlorinated biphenyls (PCBs), the synthetic electrical insulation fluid in transformers and capacitors, known to reduce the risk of fire hazards due to their high chemical stability and low flammability turned out to be environmentally hazardous. In this research, different techniques used to analyses Polychlorinated biphenyls (PCBs) in transformer oil including their qualification and identification processes have been outlined. 12 samples of transformer oils collected from various transformers from Kebbi state, Nigeria were investigated. Solid Phase Extraction (SPE) method was used to treat the oil samples and extracts were analyzed on Gas Chromatography with Electron Capture Detection (GC/ECD). No detectable PCBs were observed. To check the efficiency the SPE tubes, oil sample A10 was spiked with Mix 525 of PCB standard and treated. A full recovery of all the PCBs of Mix 525 was made even at a level as low as 50ng/ul with GC/MS. The results obtained in this study confirm that transformer oil from Kebbi state is well within the safe level of PCBs in accordance with EPA PCB Regulatory limited.
Polychlorinated biphenyls (PCBs), the synthetic electrical insulation fluid in transformers and capacitors, known to reduce the risk of fire hazards due to their high chemical stability and low flammability turned out to be environmentally hazardous. In this research, different techniques used to analyses Polychlorinated biphenyls (PCBs) in transformer oil including their qualification and identification processes have been outlined. 12 samples of transformer oils collected from various transformers from Kebbi state, Nigeria were investigated. Solid Phase Extraction (SPE) method was used to treat the oil samples and extracts were analyzed on Gas Chromatography with Electron Capture Detection (GC/ECD). No detectable PCBs were observed. To check the efficiency the SPE tubes, oil sample A10 was spiked with Mix 525 of PCB standard and treated. A full recovery of all the PCBs of Mix 525 was made even at a level as low as 50ng/ul with GC/MS. The results obtained in this study confirm that transformer oil from Kebbi state is well within the safe level of PCBs in accordance with EPA PCB Regulatory limited.
A Test for Solid Phase Extracted Polychlorinated Biphenyls (PCBs) Levels in Transformer Oil
doi:10.11648/j.epes.20130203.11
American Journal of Electrical Power and Energy Systems
2014-01-01
© Science Publishing Group
E. A. Kamba
A. U. Itodo
E. Ogah
A Test for Solid Phase Extracted Polychlorinated Biphenyls (PCBs) Levels in Transformer Oil
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© Science Publishing Group
Compensation of Voltage Flicker by Using Facts Devices
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20130203.12
Voltage flicker occurs when heavy loads are periodically turned on and off in a weak distribution system. If the distribution system’s short circuit capacity is not large enough, voltage fluctuations will occur. Voltage flickering can be extremely harmful to sensitive electronic equipment. Computerized equipment requires stable voltage to perform properly. This paper covers the contrasting approaches; dealing with the voltage flicker mitigation in three stages and assessing the related results in details. Initially, the voltage flicker mitigation, using FCTCR (Fixed Capacitor Thyristor Controlled Reactor), was simulated. Secondly, the compensation for the Static Synchronous Compensator (STATCOM) has been performed. In this case, injection of harmonics into the system caused some problems which were later overcome by using 12-pulse assignment of SATCOM and RLC filters. The obtained results show that STATCOM is very efficient and effective for the flicker compensation. All the simulations have been performed on the MATLAB Software
Voltage flicker occurs when heavy loads are periodically turned on and off in a weak distribution system. If the distribution system’s short circuit capacity is not large enough, voltage fluctuations will occur. Voltage flickering can be extremely harmful to sensitive electronic equipment. Computerized equipment requires stable voltage to perform properly. This paper covers the contrasting approaches; dealing with the voltage flicker mitigation in three stages and assessing the related results in details. Initially, the voltage flicker mitigation, using FCTCR (Fixed Capacitor Thyristor Controlled Reactor), was simulated. Secondly, the compensation for the Static Synchronous Compensator (STATCOM) has been performed. In this case, injection of harmonics into the system caused some problems which were later overcome by using 12-pulse assignment of SATCOM and RLC filters. The obtained results show that STATCOM is very efficient and effective for the flicker compensation. All the simulations have been performed on the MATLAB Software
Compensation of Voltage Flicker by Using Facts Devices
doi:10.11648/j.epes.20130203.12
American Journal of Electrical Power and Energy Systems
2014-01-01
© Science Publishing Group
Jyothilal Nayak Bharothu
K Lalitha
Compensation of Voltage Flicker by Using Facts Devices
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© Science Publishing Group
Designing of Dynamic Voltage Restorer (DVR) to Improve the Power Quality for Restructured Power Systems
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20130203.15
In Restructured power systems, Power quality is one of the major concerns in the present era. The problem of harmonics, voltage sags and swells and its major impact on sensitive loads are well known. To solve this problem, custom power devices are used. One of those devices is the Dynamic Voltage Restorer (DVR), which is one of the most efficient and effective modern custom power devices used in power distribution networks for the power quality improvement. Control of power quality problems involves cooperation between network operator (utility), customer and equipment manufacturer. A Dynamic Voltage Restorer (DVR) is a distribution voltage DC-to-AC solid-state switching converter that injects three single phase AC output voltages in series with the distribution feeder and in synchronism with the voltages of the distribution system. A DVR is interface equipment between utility and customer connected in series between the supply and load to mitigate the three major power quality problems, namely the harmonics, voltage sags, and swells etc. This paper concentrates on the designing of Dynamic Voltage Restorer (DVR) for the harmonics compensation so that it can improve the Power Quality (PQ).
In Restructured power systems, Power quality is one of the major concerns in the present era. The problem of harmonics, voltage sags and swells and its major impact on sensitive loads are well known. To solve this problem, custom power devices are used. One of those devices is the Dynamic Voltage Restorer (DVR), which is one of the most efficient and effective modern custom power devices used in power distribution networks for the power quality improvement. Control of power quality problems involves cooperation between network operator (utility), customer and equipment manufacturer. A Dynamic Voltage Restorer (DVR) is a distribution voltage DC-to-AC solid-state switching converter that injects three single phase AC output voltages in series with the distribution feeder and in synchronism with the voltages of the distribution system. A DVR is interface equipment between utility and customer connected in series between the supply and load to mitigate the three major power quality problems, namely the harmonics, voltage sags, and swells etc. This paper concentrates on the designing of Dynamic Voltage Restorer (DVR) for the harmonics compensation so that it can improve the Power Quality (PQ).
Designing of Dynamic Voltage Restorer (DVR) to Improve the Power Quality for Restructured Power Systems
doi:10.11648/j.epes.20130203.15
American Journal of Electrical Power and Energy Systems
2014-01-01
© Science Publishing Group
M. Kavitha
T. Chandrasekhar
D. Mohan Reddy
Designing of Dynamic Voltage Restorer (DVR) to Improve the Power Quality for Restructured Power Systems
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© Science Publishing Group
Alleviation of Harmonics for the Self Excited Induction Generator (SEIG) Using Shunt Active Power Filter
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20130203.13
The Self Excited Induction Generator (SEIG) is an isolated power source, whose terminal voltage and frequency are controlled by the excitation of capacitance or the load impedance. A new strategy based on an active power filter (APF) for controlling the current and power quality of the self-excited induction generator (SEIG) is also presented in this paper. The proposed active filter proved to play an important role and give good dynamic response and robust behavior upon changes in load parameters. This investigation demonstrated that power average control strategy can facilitate the improvement of the power quality. This control method extracts fundamental (reference) components of the source current for the shunt active power line conditioners for nonlinear loads and unbalanced loads. The shunt APF in conjunction with the proposed controller perform perfectly under different steady state and transient conditions. The simulation results with nonlinear loads and unbalanced loads have showed the effectiveness of the proposed scheme for harmonic reduction in Wind based Power Generation.
The Self Excited Induction Generator (SEIG) is an isolated power source, whose terminal voltage and frequency are controlled by the excitation of capacitance or the load impedance. A new strategy based on an active power filter (APF) for controlling the current and power quality of the self-excited induction generator (SEIG) is also presented in this paper. The proposed active filter proved to play an important role and give good dynamic response and robust behavior upon changes in load parameters. This investigation demonstrated that power average control strategy can facilitate the improvement of the power quality. This control method extracts fundamental (reference) components of the source current for the shunt active power line conditioners for nonlinear loads and unbalanced loads. The shunt APF in conjunction with the proposed controller perform perfectly under different steady state and transient conditions. The simulation results with nonlinear loads and unbalanced loads have showed the effectiveness of the proposed scheme for harmonic reduction in Wind based Power Generation.
Alleviation of Harmonics for the Self Excited Induction Generator (SEIG) Using Shunt Active Power Filter
doi:10.11648/j.epes.20130203.13
American Journal of Electrical Power and Energy Systems
2014-01-01
© Science Publishing Group
A. M Bouzid
A. Cheriti
M. Bouhamida
M. Benghanem
Alleviation of Harmonics for the Self Excited Induction Generator (SEIG) Using Shunt Active Power Filter
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© Science Publishing Group
Simulation of Non Linear Adaptive Observer for Sensorless Induction Motor Control
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20130203.14
This paper presents a model reference adaptive system based sensorless induction motor drive. In this scheme, an adaptive full order flux observer is used. The simulation result show that with the large PI gain for the adaptive scheme, the convergence for the speed estimation is fast and very well, however higher harmonics and noises are included in the estimated speed. Usually noises caused by inverter. Simulation results show that proposed scheme can estimate the motor speed under various adaptive PI gains and estimated speed can replace to measured speed in sensorless induction motor.
This paper presents a model reference adaptive system based sensorless induction motor drive. In this scheme, an adaptive full order flux observer is used. The simulation result show that with the large PI gain for the adaptive scheme, the convergence for the speed estimation is fast and very well, however higher harmonics and noises are included in the estimated speed. Usually noises caused by inverter. Simulation results show that proposed scheme can estimate the motor speed under various adaptive PI gains and estimated speed can replace to measured speed in sensorless induction motor.
Simulation of Non Linear Adaptive Observer for Sensorless Induction Motor Control
doi:10.11648/j.epes.20130203.14
American Journal of Electrical Power and Energy Systems
2014-01-01
© Science Publishing Group
Benheniche Abdelhak
Bensaker Bachir
Simulation of Non Linear Adaptive Observer for Sensorless Induction Motor Control
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© Science Publishing Group
Analysis of Smart Grid with 132/33 KV Sub-Transmission Line In Rural Power System of Bangladesh
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20130204.12
“Smart Grid” is a modern concept which refers to the conversion of the mainstream or typical electric power grid to a modern power grid. This new conversion is a foreseeable solution to the power system problems of the modern century. Rejuvenation of the current electric power distribution system is an important step to implement the Smart Grid technology. So, distribution system engineers should be acquainted with the knowledge of Smart Distribution System. Also the customers should acknowledge the benefits that they will be enjoying from this modernized power system. There are power crisis everywhere in the world, besides there is system loss in the existing power system. It is happening in Bangladesh also. To reduce power crisis renewable source of energy like solar energy, wind energy, raw coal energy may be used. But the quantity of electricity produced by this renewable energy source is low and several kilowatts range. This electricity is utilized by smart grid which is hard for usual power grid system. For this reason we need hybrid ac/dc smart control grid system. In this report models using Wind-mil Software is proposed for reducing system loss and also incorporate smart metering so that the power flow can reach easily to the consumers. Smart grid also helps sole proprietor and individual business man to sell their little amount of electricity to the grid which they produce by their own entrepreneurship through smart meter. Line loss and regulated voltage, regulator and capacitor are also inserted here to reduce the loss and make the effective and efficient power supply to the consumer. This metering is also centrally controlled and works over a huge area. At present developing country should develop this system.
“Smart Grid” is a modern concept which refers to the conversion of the mainstream or typical electric power grid to a modern power grid. This new conversion is a foreseeable solution to the power system problems of the modern century. Rejuvenation of the current electric power distribution system is an important step to implement the Smart Grid technology. So, distribution system engineers should be acquainted with the knowledge of Smart Distribution System. Also the customers should acknowledge the benefits that they will be enjoying from this modernized power system. There are power crisis everywhere in the world, besides there is system loss in the existing power system. It is happening in Bangladesh also. To reduce power crisis renewable source of energy like solar energy, wind energy, raw coal energy may be used. But the quantity of electricity produced by this renewable energy source is low and several kilowatts range. This electricity is utilized by smart grid which is hard for usual power grid system. For this reason we need hybrid ac/dc smart control grid system. In this report models using Wind-mil Software is proposed for reducing system loss and also incorporate smart metering so that the power flow can reach easily to the consumers. Smart grid also helps sole proprietor and individual business man to sell their little amount of electricity to the grid which they produce by their own entrepreneurship through smart meter. Line loss and regulated voltage, regulator and capacitor are also inserted here to reduce the loss and make the effective and efficient power supply to the consumer. This metering is also centrally controlled and works over a huge area. At present developing country should develop this system.
Analysis of Smart Grid with 132/33 KV Sub-Transmission Line In Rural Power System of Bangladesh
doi:10.11648/j.epes.20130204.12
American Journal of Electrical Power and Energy Systems
2014-01-01
© Science Publishing Group
A. S. M. Monjurul Hasan
Md. Habibullah
A. S. M. Muhaiminul Hasan
Analysis of Smart Grid with 132/33 KV Sub-Transmission Line In Rural Power System of Bangladesh
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© Science Publishing Group
Enhancement of Power System Stability Using Self-Organized Neuro–Fuzzy Based HVDC Controls
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20130204.11
This paper presents an affective neuro – fuzzy controller (NFC) to improve the transient stability of multi-machine system with HVDC link. Fuzzy rules are used as neurons in artificial neural network (ANN) model. Excellent learning capability of ANN and heuristic fuzzy rules and input/output membership functions of fuzzy logic technique are optimally tuned from training examples by back propagation algorithm (BPA). Considerable time required for fuzzy inference system to match rules is saved using NFC. To illustrate the performance of NFC, transient stability study is carried out on a multi machine system and results are compared with conventional controller as well as fuzzy logic controller.
This paper presents an affective neuro – fuzzy controller (NFC) to improve the transient stability of multi-machine system with HVDC link. Fuzzy rules are used as neurons in artificial neural network (ANN) model. Excellent learning capability of ANN and heuristic fuzzy rules and input/output membership functions of fuzzy logic technique are optimally tuned from training examples by back propagation algorithm (BPA). Considerable time required for fuzzy inference system to match rules is saved using NFC. To illustrate the performance of NFC, transient stability study is carried out on a multi machine system and results are compared with conventional controller as well as fuzzy logic controller.
Enhancement of Power System Stability Using Self-Organized Neuro–Fuzzy Based HVDC Controls
doi:10.11648/j.epes.20130204.11
American Journal of Electrical Power and Energy Systems
2014-01-01
© Science Publishing Group
Nagu Bhookya
RamanaRao P. V
Sydulu Maheshwarapu
Enhancement of Power System Stability Using Self-Organized Neuro–Fuzzy Based HVDC Controls
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http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20130204.11
© Science Publishing Group
Estimation of the Consumer Peak Load for the Iraqi Distribution System Using Intelligent Methods
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20130205.11
The drastic increase of residential load consumption in recent years result in over loading feeder lines and transformers for the Iraqi northern area distribution system especially in the city of Mosul. Solution for this problem require up to date research study consumers load to find the proper solution to stop excess overload in the transformers and the feeders. This paper include the regional survey for samples of consumers representing typical types of different standard of living and energy consumption by distributing questioners contain list of information such as load type in daily use. Also current readings are recorded for the individual consumer for the months of the year 2006. In addition to those readings, energy consumption is recorded once every two months. The registered readings are used in conjunction with the list of questioners to find a sample (for different loads) that coincide with the list of questioner for current and energy readings. Resulting in the feasibility of using the sample to know the peak value of current for any consumer not included in the list of questioner and for any new consumer, since it become possible to decide the size of the transformers and feeder lines, to overcome the problem of overloading in any part of the distribution system. The Artificial Neural Network (ANN) is used in this paper to find the above mentioned sample.
The drastic increase of residential load consumption in recent years result in over loading feeder lines and transformers for the Iraqi northern area distribution system especially in the city of Mosul. Solution for this problem require up to date research study consumers load to find the proper solution to stop excess overload in the transformers and the feeders. This paper include the regional survey for samples of consumers representing typical types of different standard of living and energy consumption by distributing questioners contain list of information such as load type in daily use. Also current readings are recorded for the individual consumer for the months of the year 2006. In addition to those readings, energy consumption is recorded once every two months. The registered readings are used in conjunction with the list of questioners to find a sample (for different loads) that coincide with the list of questioner for current and energy readings. Resulting in the feasibility of using the sample to know the peak value of current for any consumer not included in the list of questioner and for any new consumer, since it become possible to decide the size of the transformers and feeder lines, to overcome the problem of overloading in any part of the distribution system. The Artificial Neural Network (ANN) is used in this paper to find the above mentioned sample.
Estimation of the Consumer Peak Load for the Iraqi Distribution System Using Intelligent Methods
doi:10.11648/j.epes.20130205.11
American Journal of Electrical Power and Energy Systems
2014-01-01
© Science Publishing Group
M. A. Al-Nama
M. S. Al-Hafid
A. S. Al-Fahadi
Estimation of the Consumer Peak Load for the Iraqi Distribution System Using Intelligent Methods
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http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20130205.11
© Science Publishing Group
Dynamic Active Power Control in Mosul City Ring System Using ESTATCOM
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20130205.12
Static synchronous compensation (STATCOM) is an application that utilizes a voltage source converter (VSC) to provide instantaneous reactive power support to the connected power system. Conventionally, STATCOMs are employed for reactive power support only. However, with the integration of energy storage (ES) into a STATCOM, it can provide active power support in addition to the reactive power support. The control method of a STATCOM with an energy storage device is discussed in this paper. To determine the switching level control, SPWM (Sinusoidal Pulse Width Modulation) methods is used. This paper will introduce an integrated STATCOM/BESS for the improvement of dynamic and transient stability and transmission capability. This work suggests a simple and easy to implement PI controller to control the operation of ESTATCOM placed at the weak point of Mosul city 132 kV ring system. The whole system including the ESTATCOM and its controller has been simulated after some kinds of disturbances and the results show improvements in the dynamic active and reactive power capabilities of the system.
Static synchronous compensation (STATCOM) is an application that utilizes a voltage source converter (VSC) to provide instantaneous reactive power support to the connected power system. Conventionally, STATCOMs are employed for reactive power support only. However, with the integration of energy storage (ES) into a STATCOM, it can provide active power support in addition to the reactive power support. The control method of a STATCOM with an energy storage device is discussed in this paper. To determine the switching level control, SPWM (Sinusoidal Pulse Width Modulation) methods is used. This paper will introduce an integrated STATCOM/BESS for the improvement of dynamic and transient stability and transmission capability. This work suggests a simple and easy to implement PI controller to control the operation of ESTATCOM placed at the weak point of Mosul city 132 kV ring system. The whole system including the ESTATCOM and its controller has been simulated after some kinds of disturbances and the results show improvements in the dynamic active and reactive power capabilities of the system.
Dynamic Active Power Control in Mosul City Ring System Using ESTATCOM
doi:10.11648/j.epes.20130205.12
American Journal of Electrical Power and Energy Systems
2014-01-01
© Science Publishing Group
Dhiya A. Al-Nimma
Majid S. M. Al-Hafidh
Saad Enad Mohamed
Dynamic Active Power Control in Mosul City Ring System Using ESTATCOM
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http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20130205.12
© Science Publishing Group
Critical Clearing Time Evaluation of Nigerian 330kV Transmission System
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20130206.11
Critical Clearing Time (CCT) is the largest possible time for which a power system is allowed to remain in fault condition without losing stability. Appropriate CCTs settings of protective equipments on power system greatly determine the reliability of power supply. This paper determines the CCTs for all the transmission lines in the Nigerian 24-bus, 39-lines 330kV transmission system. The Transient Stability Analysis (TSA) program adopted used the method of partitioned approach with explicit integration method. The result of TSA was considered satisfactory since about 87% of the values obtained fall within acceptable international range. It was concluded that the determination of appropriate CCTs for the Nigerian power system will enhance the operation of the power system by limiting effects of faults on the power system.
Critical Clearing Time (CCT) is the largest possible time for which a power system is allowed to remain in fault condition without losing stability. Appropriate CCTs settings of protective equipments on power system greatly determine the reliability of power supply. This paper determines the CCTs for all the transmission lines in the Nigerian 24-bus, 39-lines 330kV transmission system. The Transient Stability Analysis (TSA) program adopted used the method of partitioned approach with explicit integration method. The result of TSA was considered satisfactory since about 87% of the values obtained fall within acceptable international range. It was concluded that the determination of appropriate CCTs for the Nigerian power system will enhance the operation of the power system by limiting effects of faults on the power system.
Critical Clearing Time Evaluation of Nigerian 330kV Transmission System
doi:10.11648/j.epes.20130206.11
American Journal of Electrical Power and Energy Systems
2014-01-01
© Science Publishing Group
Adepoju Gafari Abiola
Tijani Muhammed Adekilekun
Critical Clearing Time Evaluation of Nigerian 330kV Transmission System
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http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20130206.11
© Science Publishing Group
Conceptual Framework of a Solar PV Based High Voltage Battery Charging Strategyfor PHEVs and Evs
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20130206.13
With the emergence of plugin hybrid electric vehicles (PHEVs) and electric vehicles (EVs) in the automotive market, the rate of the demand for electric power supply may be higher than the projected level. Distributed power generation is a feasible solution to balance the demand and supply of the power industry. In this work, a conceptual model of a solar photovoltaic (PV) based distributed generation system is proposed for charging the PHEVs and EVs. Outline of the overall system is developed with details of the background and feasibility analysis through hardware in the loop experiment of the proposed strategy.
With the emergence of plugin hybrid electric vehicles (PHEVs) and electric vehicles (EVs) in the automotive market, the rate of the demand for electric power supply may be higher than the projected level. Distributed power generation is a feasible solution to balance the demand and supply of the power industry. In this work, a conceptual model of a solar photovoltaic (PV) based distributed generation system is proposed for charging the PHEVs and EVs. Outline of the overall system is developed with details of the background and feasibility analysis through hardware in the loop experiment of the proposed strategy.
Conceptual Framework of a Solar PV Based High Voltage Battery Charging Strategyfor PHEVs and Evs
doi:10.11648/j.epes.20130206.13
American Journal of Electrical Power and Energy Systems
2014-01-01
© Science Publishing Group
Mohammad Saad Alam
Conceptual Framework of a Solar PV Based High Voltage Battery Charging Strategyfor PHEVs and Evs
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2014-01-01
10.11648/j.epes.20130206.13
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20130206.13
© Science Publishing Group
Time-Dependent Exergy Analysis of a 120 MW Steam Turbine Unit of Sapele Power Plant
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20130206.12
Time-dependent exergy model was used to assess the exergy losses that occurred in the major components of a 120 MW steam turbine unit of Sapele power station. Data used for the analysis were both base parameters and measured values recorded in the station operational logbook for the period of January 2007 to December 2011. Component’s exergy destruction increments as compared with its base value were highlighted and possible causes of the increment were identified. The boiler section had the highest value. The economiser had a maximumof 4.26 % in 2009 and minimum of 1.25 % in 2007. While the evaporator had a maximium of 5.02 % in 2009 and minimum of 1.50 % in 2008. The superheater had maximum of 4.64 % in 2011 and minimum of 1.48 % in 2007. For the reheater, the maximum was 3.57 % in 2011 while the minimum was 1.71 % in 2007. Tube fouling, defective burners, steam traps and air heater fouling were adduced for the increment. Upgrading components with better designs, optimizing system performance and elimination of conditions that degrade efficiency between maintenance outages were suggested for improving the performance of the boiler section. The analysis showed that for the three turbine stages, HP turbine had the highest increment while the LP turbine had the lowest. The loss in the three turbine stages were attributed to throttling losses at the governor valves and silica deposits at the nozzles and blades. Retrofitting of rotors, diaphragms or complete stator/ rotor modules (inner block) were suggested for improving the situation. The results generally showed that exergy loss increased with increased operation time. It was observed that deterioration and obsolescence may be the major problems and that plant rehabilitation is a feasible solution. It was noted that the suggested modification and refurbishment of Sapele power plant units is an attractive solution to improve the plant economy and keep production cost competitive in a restructured Nigerian power system.
Time-dependent exergy model was used to assess the exergy losses that occurred in the major components of a 120 MW steam turbine unit of Sapele power station. Data used for the analysis were both base parameters and measured values recorded in the station operational logbook for the period of January 2007 to December 2011. Component’s exergy destruction increments as compared with its base value were highlighted and possible causes of the increment were identified. The boiler section had the highest value. The economiser had a maximumof 4.26 % in 2009 and minimum of 1.25 % in 2007. While the evaporator had a maximium of 5.02 % in 2009 and minimum of 1.50 % in 2008. The superheater had maximum of 4.64 % in 2011 and minimum of 1.48 % in 2007. For the reheater, the maximum was 3.57 % in 2011 while the minimum was 1.71 % in 2007. Tube fouling, defective burners, steam traps and air heater fouling were adduced for the increment. Upgrading components with better designs, optimizing system performance and elimination of conditions that degrade efficiency between maintenance outages were suggested for improving the performance of the boiler section. The analysis showed that for the three turbine stages, HP turbine had the highest increment while the LP turbine had the lowest. The loss in the three turbine stages were attributed to throttling losses at the governor valves and silica deposits at the nozzles and blades. Retrofitting of rotors, diaphragms or complete stator/ rotor modules (inner block) were suggested for improving the situation. The results generally showed that exergy loss increased with increased operation time. It was observed that deterioration and obsolescence may be the major problems and that plant rehabilitation is a feasible solution. It was noted that the suggested modification and refurbishment of Sapele power plant units is an attractive solution to improve the plant economy and keep production cost competitive in a restructured Nigerian power system.
Time-Dependent Exergy Analysis of a 120 MW Steam Turbine Unit of Sapele Power Plant
doi:10.11648/j.epes.20130206.12
American Journal of Electrical Power and Energy Systems
2014-01-01
© Science Publishing Group
Obodeh, O.
Ugwuoke, P. E.
Time-Dependent Exergy Analysis of a 120 MW Steam Turbine Unit of Sapele Power Plant
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© Science Publishing Group
Fault Detection and Classification Based on DWT and Modern Approaches for T.L Compensated with FACTS
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20130206.15
A new approach for detecting and classifying a fault for transmission line compensated with Flexible AC Transmission System (FACTS) is presented in this paper. Unified Power Flow Controller (UPFC) is one of the most advanced FACTS devices that can simultaneously and independently control both the real and reactive power flow in a transmission line. The proposed technique consists of preprocessing module based on Discrete Wavelet Transform (DWT) in combination with Artificial Neural Network (ANN) or Gaussian Process (GP) for detecting and classifying fault events.
A new approach for detecting and classifying a fault for transmission line compensated with Flexible AC Transmission System (FACTS) is presented in this paper. Unified Power Flow Controller (UPFC) is one of the most advanced FACTS devices that can simultaneously and independently control both the real and reactive power flow in a transmission line. The proposed technique consists of preprocessing module based on Discrete Wavelet Transform (DWT) in combination with Artificial Neural Network (ANN) or Gaussian Process (GP) for detecting and classifying fault events.
Fault Detection and Classification Based on DWT and Modern Approaches for T.L Compensated with FACTS
doi:10.11648/j.epes.20130206.15
American Journal of Electrical Power and Energy Systems
2014-01-01
© Science Publishing Group
Noha Mahmoud Bastawy
Hossam El-din Talaat
Amr Mohamed Ibrahim
Fault Detection and Classification Based on DWT and Modern Approaches for T.L Compensated with FACTS
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155
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2014-01-01
2014-01-01
10.11648/j.epes.20130206.15
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20130206.15
© Science Publishing Group
Disruptions and Malfunction Control in ORC using Spiral Predictive Model
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20130206.14
This paper provides a critical and analytical assay in the process vicinity of an Organic Rankine Cycle (ORC) resulting in a representation of a controlling model named as Spiral Model as the best approach to implement for an efficient Plant Management (PM) and Risk Mitigation Planning (RMP), focusing on the robust and elegant energy production. There have been so many predictive and sensing process models presented for a gist and substantial control of the ORC plant in recent years but the proposed Spiral Predictive Model (SPM), eliminating all the limitation of all previously implemented models, provides the robustness by performing all the roles in increments; e.g. in the changing controllers, complex time-frequency characteristics, fault detectors for turbines against disruptions and the multi-switching techniques needs to be cascaded ahead of time with predictive and detective techniques. The proposed model optimizes the performance of ORC by response tracking and recursive correction which relegates the errors and sudden disturbance in the process flow. Fast response and recursive correction nicely handles Demand Response (DR) and parameters variations at different working modules which ultimately provide the dynamic performance capability. This study will be elaborating efficient model design and implementation to conjure up a well-designed working flow in an ORC plant.
This paper provides a critical and analytical assay in the process vicinity of an Organic Rankine Cycle (ORC) resulting in a representation of a controlling model named as Spiral Model as the best approach to implement for an efficient Plant Management (PM) and Risk Mitigation Planning (RMP), focusing on the robust and elegant energy production. There have been so many predictive and sensing process models presented for a gist and substantial control of the ORC plant in recent years but the proposed Spiral Predictive Model (SPM), eliminating all the limitation of all previously implemented models, provides the robustness by performing all the roles in increments; e.g. in the changing controllers, complex time-frequency characteristics, fault detectors for turbines against disruptions and the multi-switching techniques needs to be cascaded ahead of time with predictive and detective techniques. The proposed model optimizes the performance of ORC by response tracking and recursive correction which relegates the errors and sudden disturbance in the process flow. Fast response and recursive correction nicely handles Demand Response (DR) and parameters variations at different working modules which ultimately provide the dynamic performance capability. This study will be elaborating efficient model design and implementation to conjure up a well-designed working flow in an ORC plant.
Disruptions and Malfunction Control in ORC using Spiral Predictive Model
doi:10.11648/j.epes.20130206.14
American Journal of Electrical Power and Energy Systems
2014-01-01
© Science Publishing Group
Fareed ud Din
Abdul Rehman Raza
Muhammad Azam
Disruptions and Malfunction Control in ORC using Spiral Predictive Model
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2014-01-01
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http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20130206.14
© Science Publishing Group
Scenario of Electricity Trading in South Asia: Perspective and Feasibility of Trading between India and Bangladesh
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20130206.16
Uninterrupted electricity supply is the precondition of economic development of a country. Bangladesh has huge electrical power deficiency and to minimize this lagging, Government is importing 250 MW electrical power from India. India is itself an electricity deficiency country and has already relationship of trading with two south Asian countries, but the policies of those trading are not beneficial for those respective countries. On the other hand Bangladesh is richer than many other south Asian countries in respect to primary energy reserve. Proper management of this primary energy and electricity sector, to produce and use electricity properly could be a good solution of running electricity scarcity problem of Bangladesh. In some context inter-countries trading is important in south Asia to have a sustainable economic growth when it is beneficial and preserve the right for both countries. Purchasing power from India cannot be a fruitful solution because it will increase our dependency on them. By this trading we may reduce the electricity crisis instantly but could be a cause of long term negative effect on our overall economy. Moreover most of the energy specialists and learned people have negative opinion about this electricity trading. This trading cannot be the good and permanent solution to solve power scarcity problem of this country. Bangladesh should try to be self sufficient in electrical power by proper management and utilization of its own resources instead of spending money for purchasing power from India.
Uninterrupted electricity supply is the precondition of economic development of a country. Bangladesh has huge electrical power deficiency and to minimize this lagging, Government is importing 250 MW electrical power from India. India is itself an electricity deficiency country and has already relationship of trading with two south Asian countries, but the policies of those trading are not beneficial for those respective countries. On the other hand Bangladesh is richer than many other south Asian countries in respect to primary energy reserve. Proper management of this primary energy and electricity sector, to produce and use electricity properly could be a good solution of running electricity scarcity problem of Bangladesh. In some context inter-countries trading is important in south Asia to have a sustainable economic growth when it is beneficial and preserve the right for both countries. Purchasing power from India cannot be a fruitful solution because it will increase our dependency on them. By this trading we may reduce the electricity crisis instantly but could be a cause of long term negative effect on our overall economy. Moreover most of the energy specialists and learned people have negative opinion about this electricity trading. This trading cannot be the good and permanent solution to solve power scarcity problem of this country. Bangladesh should try to be self sufficient in electrical power by proper management and utilization of its own resources instead of spending money for purchasing power from India.
Scenario of Electricity Trading in South Asia: Perspective and Feasibility of Trading between India and Bangladesh
doi:10.11648/j.epes.20130206.16
American Journal of Electrical Power and Energy Systems
2014-01-01
© Science Publishing Group
Anmona Shabnam Pranti
Arif Mohammad Shahed Iqubal
Mohammad Shawkut Ali Khan
Mohammad Kayesar Ahmmed
Scenario of Electricity Trading in South Asia: Perspective and Feasibility of Trading between India and Bangladesh
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165
165
2014-01-01
2014-01-01
10.11648/j.epes.20130206.16
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20130206.16
© Science Publishing Group
Design, Modelling and Simulation of Fuzzy Controlled SVC for 750 km (λ/8) Transmission Line
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20140301.11
Flexible AC transmission system (FACTS) is a technology, which is based on power electronic devices, used to enhance the existing transmission capabilities in order to make the transmission system flexible and independent operation. The FACTS technology is a promising technology to achieve complete deregulation of Power System i.e. Generation, Transmission and Distribution as complete individual units. The loading capability of transmission system can also be enhanced nearer to the thermal limits without affecting the stability. Complete close-loop smooth control of reactive power can be achieved using shunt connected FACTS devices. Static VAR Compensator (SVC) is one of the shunt connected FACTS device, which can be utilized for the purpose of reactive power compensation. Intelligent FACTS devices make them adaptable and hence it is emerging in the present state of art. This paper attempts to design and simulate the Fuzzy logic control of firing angle for SVC in order to achieve better, smooth and adaptive control of reactive power. The design, modeling and simulations are carried out for λ /8 Transmission line and the compensation is placed at the receiving end (load end).
Flexible AC transmission system (FACTS) is a technology, which is based on power electronic devices, used to enhance the existing transmission capabilities in order to make the transmission system flexible and independent operation. The FACTS technology is a promising technology to achieve complete deregulation of Power System i.e. Generation, Transmission and Distribution as complete individual units. The loading capability of transmission system can also be enhanced nearer to the thermal limits without affecting the stability. Complete close-loop smooth control of reactive power can be achieved using shunt connected FACTS devices. Static VAR Compensator (SVC) is one of the shunt connected FACTS device, which can be utilized for the purpose of reactive power compensation. Intelligent FACTS devices make them adaptable and hence it is emerging in the present state of art. This paper attempts to design and simulate the Fuzzy logic control of firing angle for SVC in order to achieve better, smooth and adaptive control of reactive power. The design, modeling and simulations are carried out for λ /8 Transmission line and the compensation is placed at the receiving end (load end).
Design, Modelling and Simulation of Fuzzy Controlled SVC for 750 km (λ/8) Transmission Line
doi:10.11648/j.epes.20140301.11
American Journal of Electrical Power and Energy Systems
2014-01-01
© Science Publishing Group
Murali. Matcha
Sharath Kumar. Papani
Vijetha. Killamsetti
Design, Modelling and Simulation of Fuzzy Controlled SVC for 750 km (λ/8) Transmission Line
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2014-01-01
2014-01-01
10.11648/j.epes.20140301.11
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20140301.11
© Science Publishing Group
Combined Operation of SVC, PSS and Increasing Inertia of Machine for Power System Transient Stability Enhancement
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20140301.12
In this paper improvement of transient stability by coordination of PSS (Power System Stabilizer) and SVC (Static var Compensator) and increasing inertia of synchronous machine has been observed. Because single method is not sufficient for improving stability. For this purpose a 9 bus multi machine system has been considered. Transient stability improvement has been tested subjected to three phase fault at bus 3 after 0.5 second and fault has been cleared after 1 second. By the use of PSS, SVC and by increasing inertia method for the test system the electromechanical oscillation for generator electrical power has been reduced and the steady state power transfer has been enhanced. In this paper the Inertia of the machine is not so much increased. Because after increasing inertia of the machine rotor will be havier.so that it is kept always within limit as considering its reliability and economy. And field voltage is also kept limited.
In this paper improvement of transient stability by coordination of PSS (Power System Stabilizer) and SVC (Static var Compensator) and increasing inertia of synchronous machine has been observed. Because single method is not sufficient for improving stability. For this purpose a 9 bus multi machine system has been considered. Transient stability improvement has been tested subjected to three phase fault at bus 3 after 0.5 second and fault has been cleared after 1 second. By the use of PSS, SVC and by increasing inertia method for the test system the electromechanical oscillation for generator electrical power has been reduced and the steady state power transfer has been enhanced. In this paper the Inertia of the machine is not so much increased. Because after increasing inertia of the machine rotor will be havier.so that it is kept always within limit as considering its reliability and economy. And field voltage is also kept limited.
Combined Operation of SVC, PSS and Increasing Inertia of Machine for Power System Transient Stability Enhancement
doi:10.11648/j.epes.20140301.12
American Journal of Electrical Power and Energy Systems
2014-01-01
© Science Publishing Group
Bablesh Kumar Jha
Ramjee Prasad Gupta
Upendra Prasad
Combined Operation of SVC, PSS and Increasing Inertia of Machine for Power System Transient Stability Enhancement
3
1
14
14
2014-01-01
2014-01-01
10.11648/j.epes.20140301.12
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20140301.12
© Science Publishing Group
Experimental Identification of the Equivalent Conductive Resistance of a Thermal Elementary Model of an Induction Machine
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20140302.11
This paper proposes a basic thermal model to estimate the temperature in different points of an induction motor, totally enclosed with external ventilation, for different loads at steady state. This basic model consists simply of a conductive thermal resistance for each point considered in the machine. Thereafter, the intermediates thermal resistances of conduction of the model are deduced. This approach is very easy to implement, requiring no geometrical data, or thermo-physical coefficients, or complex methods of implementation of a thermal model. Indeed, by knowledge of total losses in the machine, the temperature of the carcass, and the temperature of any point inside of the latter allows to deduct the equivalent thermal resistance of conduction of the different points and so the corresponding temperature.
This paper proposes a basic thermal model to estimate the temperature in different points of an induction motor, totally enclosed with external ventilation, for different loads at steady state. This basic model consists simply of a conductive thermal resistance for each point considered in the machine. Thereafter, the intermediates thermal resistances of conduction of the model are deduced. This approach is very easy to implement, requiring no geometrical data, or thermo-physical coefficients, or complex methods of implementation of a thermal model. Indeed, by knowledge of total losses in the machine, the temperature of the carcass, and the temperature of any point inside of the latter allows to deduct the equivalent thermal resistance of conduction of the different points and so the corresponding temperature.
Experimental Identification of the Equivalent Conductive Resistance of a Thermal Elementary Model of an Induction Machine
doi:10.11648/j.epes.20140302.11
American Journal of Electrical Power and Energy Systems
2014-01-01
© Science Publishing Group
R. Khaldi
N. Benamrouche
M. Bouheraoua
Experimental Identification of the Equivalent Conductive Resistance of a Thermal Elementary Model of an Induction Machine
3
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20
20
2014-01-01
2014-01-01
10.11648/j.epes.20140302.11
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20140302.11
© Science Publishing Group
Transient Stability Enhancement of 30 Bus Multi- Machine Systems by using PSS & Increasing Inertia
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20140302.12
In this paper the transient stability enhancement of a 30- bus multi-machine system by using Power system stabilizer and increasing inertia has been observed, as single method is not sufficient for this purpose. We have created a three phase fault at time 0.04 seconds at bus 7 and cleared at time 0.5 seconds. On implementing PSS and on increasing the inertia of the machine we achieved a better response in terms of power swing when compared with initial condition. The inertia of the machine is kept within a certain limit. And 30 bus multi-machine system maintain its own permissible operating condition.
In this paper the transient stability enhancement of a 30- bus multi-machine system by using Power system stabilizer and increasing inertia has been observed, as single method is not sufficient for this purpose. We have created a three phase fault at time 0.04 seconds at bus 7 and cleared at time 0.5 seconds. On implementing PSS and on increasing the inertia of the machine we achieved a better response in terms of power swing when compared with initial condition. The inertia of the machine is kept within a certain limit. And 30 bus multi-machine system maintain its own permissible operating condition.
Transient Stability Enhancement of 30 Bus Multi- Machine Systems by using PSS & Increasing Inertia
doi:10.11648/j.epes.20140302.12
American Journal of Electrical Power and Energy Systems
2014-01-01
© Science Publishing Group
Nitin Mohan Lal
Arvind Kumar Singh
Transient Stability Enhancement of 30 Bus Multi- Machine Systems by using PSS & Increasing Inertia
3
2
26
26
2014-01-01
2014-01-01
10.11648/j.epes.20140302.12
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20140302.12
© Science Publishing Group
A Fault Analysis of 11kv Distribution System (A Case Study of Ado Ekiti Electrical Power Distribution District)
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20140302.13
The aim of this research work is to carry out fault analysis of 11KV distribution power system. Electric power is an essential facilitator for sustainable development of the modern nation state. While Nigeria is reported to suffer from severe shortages of electric power the condition of some of its newer constitutional units are unknown. In this work, electric power infrastructure and energy availability is studied for Ado-Ekiti, the principal economic and political hub of Ekiti State. During the study, the condition of all relevant equipment for power distribution at the 11 kV level was assessed. Power availability was also considered by collecting necessary data that had to do with energy supplied, faults and other outages. It was discovered that the distribution lines were in a rather poor state with as many as 25% of the poles not meeting a condition of "goodness", 33% of cross-arms being broken or unsatisfactory, about 10% of the insulators defective and almost 40% of the span not complying with standards. Hence this work presents a research on fault analysis of Ado Ekiti distribution power system.
The aim of this research work is to carry out fault analysis of 11KV distribution power system. Electric power is an essential facilitator for sustainable development of the modern nation state. While Nigeria is reported to suffer from severe shortages of electric power the condition of some of its newer constitutional units are unknown. In this work, electric power infrastructure and energy availability is studied for Ado-Ekiti, the principal economic and political hub of Ekiti State. During the study, the condition of all relevant equipment for power distribution at the 11 kV level was assessed. Power availability was also considered by collecting necessary data that had to do with energy supplied, faults and other outages. It was discovered that the distribution lines were in a rather poor state with as many as 25% of the poles not meeting a condition of "goodness", 33% of cross-arms being broken or unsatisfactory, about 10% of the insulators defective and almost 40% of the span not complying with standards. Hence this work presents a research on fault analysis of Ado Ekiti distribution power system.
A Fault Analysis of 11kv Distribution System (A Case Study of Ado Ekiti Electrical Power Distribution District)
doi:10.11648/j.epes.20140302.13
American Journal of Electrical Power and Energy Systems
2014-04-08
© Science Publishing Group
Kehinde Olusuyi
Ayodele Sunday Oluwole
Temitope Adefarati
Adedayo Kayode Babarinde
A Fault Analysis of 11kv Distribution System (A Case Study of Ado Ekiti Electrical Power Distribution District)
3
2
36
36
2014-04-08
2014-04-08
10.11648/j.epes.20140302.13
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20140302.13
© Science Publishing Group
Evaluation of Electricity Consumption of a Residential Flat in Egypt
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20140302.14
Energy saving is one of the most important demands in our world .The aim of this paper is to evaluate the annual electrical energy consumption of a residential flat in EGYPT and how to reduce it. This evaluation includes the compatibility of a flat for the Egyptian code requirements of residential buildings. This flat is of a total area of 160 m2 with one façade opening. A software package Visual-Doe 4.0 was used for this analysis. Three different climatic regions were used for this analysis: Cairo, Alexandria and Aswan cities with different weather conditions (due to their geographical location on latitude 30.1, 31.2 and 24 respectively). The results give the minimum requirements of walls insulation (2.5cm) for different orientation and different climatic location. Also an average maximum reduction of about 17.11 % of the total electrical energy consumption with insulation 5cm compared to the actual consumption is fulfilled
Energy saving is one of the most important demands in our world .The aim of this paper is to evaluate the annual electrical energy consumption of a residential flat in EGYPT and how to reduce it. This evaluation includes the compatibility of a flat for the Egyptian code requirements of residential buildings. This flat is of a total area of 160 m2 with one façade opening. A software package Visual-Doe 4.0 was used for this analysis. Three different climatic regions were used for this analysis: Cairo, Alexandria and Aswan cities with different weather conditions (due to their geographical location on latitude 30.1, 31.2 and 24 respectively). The results give the minimum requirements of walls insulation (2.5cm) for different orientation and different climatic location. Also an average maximum reduction of about 17.11 % of the total electrical energy consumption with insulation 5cm compared to the actual consumption is fulfilled
Evaluation of Electricity Consumption of a Residential Flat in Egypt
doi:10.11648/j.epes.20140302.14
American Journal of Electrical Power and Energy Systems
2014-04-11
© Science Publishing Group
Mofreh M. Nassief
Evaluation of Electricity Consumption of a Residential Flat in Egypt
3
2
44
44
2014-04-11
2014-04-11
10.11648/j.epes.20140302.14
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20140302.14
© Science Publishing Group
Transient Stability Improvement by Using PSS and Increasing Inertia of Synchronous Machine
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20140302.15
The main objective of this paper is to perform transient stability analysis using the electrical power system design and analysis software namely E-Tap. The purpose of performing transient stability on the power system is to study the stability of a system under various disturbances. The stability of the power system is the ability of generators to remain in synchronization even when subjected to disturbance. In this paper a 9-bus test system is considered fig.(1). Improvement of transient stability by coordination of PSS (Power System Stabilizer) and increasing inertia of synchronous machine has been observed
The main objective of this paper is to perform transient stability analysis using the electrical power system design and analysis software namely E-Tap. The purpose of performing transient stability on the power system is to study the stability of a system under various disturbances. The stability of the power system is the ability of generators to remain in synchronization even when subjected to disturbance. In this paper a 9-bus test system is considered fig.(1). Improvement of transient stability by coordination of PSS (Power System Stabilizer) and increasing inertia of synchronous machine has been observed
Transient Stability Improvement by Using PSS and Increasing Inertia of Synchronous Machine
doi:10.11648/j.epes.20140302.15
American Journal of Electrical Power and Energy Systems
2014-04-12
© Science Publishing Group
Pushpalata Khalkho
Arvind Kumar Singh
Transient Stability Improvement by Using PSS and Increasing Inertia of Synchronous Machine
3
2
49
49
2014-04-12
2014-04-12
10.11648/j.epes.20140302.15
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20140302.15
© Science Publishing Group
Unified Power Flow Controller (UPFC) Integrated with Electromagnetic Energy Storage System for System Stability Enhancement
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20140303.11
In this paper analysis the UPFC integrated with energy storage devices for improvement of system stability compensation. Before that, used traditional UPFC is to control all transmission line parameters simultaneously or selectively but don’t have appropriate control for throughout system. During large transients; traditional UPFC have restricted capability of power flow control. In this paper to do reduce or eliminate that negative aspect of established UPFC using substantial energy storage devices adapted with UPFC. In this proposed system Integration of Superconducting Magnetic Energy Storage (SMES) into UPFC is described. SMES is connected to UPFC through an interface with DC-DC chopper. UPFC with SMES system will inject or absorb real and reactive power to or from an influence system at really quick rate on a repetitive beginning of stability problem. Here Comparative Analysis of the two types, one is integration of electromagnetic energy storage into UPFC and another is integration of electrochemical energy storage into UPFC is done by means of MATLAB/SIMULINK software package.
In this paper analysis the UPFC integrated with energy storage devices for improvement of system stability compensation. Before that, used traditional UPFC is to control all transmission line parameters simultaneously or selectively but don’t have appropriate control for throughout system. During large transients; traditional UPFC have restricted capability of power flow control. In this paper to do reduce or eliminate that negative aspect of established UPFC using substantial energy storage devices adapted with UPFC. In this proposed system Integration of Superconducting Magnetic Energy Storage (SMES) into UPFC is described. SMES is connected to UPFC through an interface with DC-DC chopper. UPFC with SMES system will inject or absorb real and reactive power to or from an influence system at really quick rate on a repetitive beginning of stability problem. Here Comparative Analysis of the two types, one is integration of electromagnetic energy storage into UPFC and another is integration of electrochemical energy storage into UPFC is done by means of MATLAB/SIMULINK software package.
Unified Power Flow Controller (UPFC) Integrated with Electromagnetic Energy Storage System for System Stability Enhancement
doi:10.11648/j.epes.20140303.11
American Journal of Electrical Power and Energy Systems
2014-05-06
© Science Publishing Group
Saravanan Kandasamy
Dawit Leykuen Berhanu
Getnet Zewde Somanu
Unified Power Flow Controller (UPFC) Integrated with Electromagnetic Energy Storage System for System Stability Enhancement
3
3
59
59
2014-05-06
2014-05-06
10.11648/j.epes.20140303.11
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20140303.11
© Science Publishing Group
Assessment of a Viability of Wind Power in Iraq
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20140303.12
Wind energy is now being used in almost every country of the world as an important and pollution free renewable source of energy. This study deals with the feasibility of utilizing winds in generating electricity in Iraq by using the daily average wind speed data since (1/4/2011 to 1/4/2012) for fifteen stations from different regions have been selected for this purpose and for three height (12,50,100 m)and applied it with wind turbine (3Kw). The wind power and the wind power density for the selected stations have been calculated and the maximum values at Basrah (Albrjsuh), the medium values at Baghdad (Abughraib) and the lowest values in northern region Mosul (Bashiqah). Byusing the graphical method to calculate the Weibull distribution .the highest values foe Weibull parameters at Basrah (Albrjsuh), the medium values at Baghdad (Abughraib) and the lowest values in Mosul (Bashiqah). The regression statistical analysis correlation was found for all stations and the most effective values was in at Basrah (Albrjsuh), the medium values at Baghdad (Abughraib) and the lowest values was Mosul (Bashiqah).
Wind energy is now being used in almost every country of the world as an important and pollution free renewable source of energy. This study deals with the feasibility of utilizing winds in generating electricity in Iraq by using the daily average wind speed data since (1/4/2011 to 1/4/2012) for fifteen stations from different regions have been selected for this purpose and for three height (12,50,100 m)and applied it with wind turbine (3Kw). The wind power and the wind power density for the selected stations have been calculated and the maximum values at Basrah (Albrjsuh), the medium values at Baghdad (Abughraib) and the lowest values in northern region Mosul (Bashiqah). Byusing the graphical method to calculate the Weibull distribution .the highest values foe Weibull parameters at Basrah (Albrjsuh), the medium values at Baghdad (Abughraib) and the lowest values in Mosul (Bashiqah). The regression statistical analysis correlation was found for all stations and the most effective values was in at Basrah (Albrjsuh), the medium values at Baghdad (Abughraib) and the lowest values was Mosul (Bashiqah).
Assessment of a Viability of Wind Power in Iraq
doi:10.11648/j.epes.20140303.12
American Journal of Electrical Power and Energy Systems
2014-07-07
© Science Publishing Group
Osama Tarek Al-Taai
Qassim Mahdi Wadi
Amani Ibraheem Al-Tmimi
Assessment of a Viability of Wind Power in Iraq
3
3
70
70
2014-07-07
2014-07-07
10.11648/j.epes.20140303.12
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20140303.12
© Science Publishing Group
The Linear Induction Motor (LIM) & Single Linear Induction Motor (SLIM)
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20140304.11
First of all mentions linear induction machines in 1890, only two years after the discovery of the rotary induction principle. Basically the concept of the linear device consists in imagining a rotary machine to be cut along a radial plane and 'unrolled' so that the primary member then consists of a single row of coils in slots in a laminated steel core. The differences between rotary and linear motors are outlined and reasons for the slow application of linear motors are explained. Principal developments in linear machines since the 1950s are described. Induction motor which can be used to power capsules in an xv capsules in a pneumatic capsule pipeline system. Several optimal design schemes of a single sided linear induction motor (SLIM) adopted in linear metro are presented in this paper Firstly the equivalent circuit of SLIM fully considering the end effects, half-filled slots, back iron saturation and skin effect is proposed ,based on one dimensional air gap magnetic equations In the circuit, several coefficients including longitudinal end effect coefficients Kr(s) and Kx(s), transversal end edge effect coefficients Cr(s) and Cx (s), and skin effect coefficient K fare achieved by using the dummy electric potential method and complex power equivalence between primary and secondary sides Furthermore, several optimal design restraint equations of SLIM are provided in order to improve the operational efficiency and reduce the primary weight. The result tries to establish a new concept for elevators through a new construction technique and assembly of the system with counterweight, which increases the reliability and comfort with cost reduction.
First of all mentions linear induction machines in 1890, only two years after the discovery of the rotary induction principle. Basically the concept of the linear device consists in imagining a rotary machine to be cut along a radial plane and 'unrolled' so that the primary member then consists of a single row of coils in slots in a laminated steel core. The differences between rotary and linear motors are outlined and reasons for the slow application of linear motors are explained. Principal developments in linear machines since the 1950s are described. Induction motor which can be used to power capsules in an xv capsules in a pneumatic capsule pipeline system. Several optimal design schemes of a single sided linear induction motor (SLIM) adopted in linear metro are presented in this paper Firstly the equivalent circuit of SLIM fully considering the end effects, half-filled slots, back iron saturation and skin effect is proposed ,based on one dimensional air gap magnetic equations In the circuit, several coefficients including longitudinal end effect coefficients Kr(s) and Kx(s), transversal end edge effect coefficients Cr(s) and Cx (s), and skin effect coefficient K fare achieved by using the dummy electric potential method and complex power equivalence between primary and secondary sides Furthermore, several optimal design restraint equations of SLIM are provided in order to improve the operational efficiency and reduce the primary weight. The result tries to establish a new concept for elevators through a new construction technique and assembly of the system with counterweight, which increases the reliability and comfort with cost reduction.
The Linear Induction Motor (LIM) & Single Linear Induction Motor (SLIM)
doi:10.11648/j.epes.20140304.11
American Journal of Electrical Power and Energy Systems
2014-07-14
© Science Publishing Group
Nahid Ahmadinia
The Linear Induction Motor (LIM) & Single Linear Induction Motor (SLIM)
3
4
75
75
2014-07-14
2014-07-14
10.11648/j.epes.20140304.11
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20140304.11
© Science Publishing Group
Transient Stability of 11-Bus System Using SVC and Improvement of Voltage Profile in Transmission Line Using Series Compensator
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20140304.12
Power system stability is defined as the ability of power system to preserve its steady stability or recover the initial steady state after any deviation of the system’s operation. Present time power systems are being operated nearer to their stability limits due to economic and environmental reasons. Maintaining a stable and secure operation of a power system is therefore a very important and challenging issue. Transient stability has been given much attention by power system researchers and planners in recent years, and is being regarded as one of the major sources of power system insecurity. Shunt FACTS devices play an important role in improving the transient stability, increasing transmission capacity and damping low frequency oscillations. In this work 11-bus power system network has been modeled using MATLAB SIMULINK software. The power system network under study consist of three units of power plant each producing 20 KV and step up by two winding transformer to 230 KV. For parallel operation of two different power plants, the frequency and the terminal voltage has been kept constant to avoid circulating current in the existing network. A Static VAR Compensator and a series compensator have been used in the considered network for improving the transient stability and to increase the transmission capacity of the system.
Power system stability is defined as the ability of power system to preserve its steady stability or recover the initial steady state after any deviation of the system’s operation. Present time power systems are being operated nearer to their stability limits due to economic and environmental reasons. Maintaining a stable and secure operation of a power system is therefore a very important and challenging issue. Transient stability has been given much attention by power system researchers and planners in recent years, and is being regarded as one of the major sources of power system insecurity. Shunt FACTS devices play an important role in improving the transient stability, increasing transmission capacity and damping low frequency oscillations. In this work 11-bus power system network has been modeled using MATLAB SIMULINK software. The power system network under study consist of three units of power plant each producing 20 KV and step up by two winding transformer to 230 KV. For parallel operation of two different power plants, the frequency and the terminal voltage has been kept constant to avoid circulating current in the existing network. A Static VAR Compensator and a series compensator have been used in the considered network for improving the transient stability and to increase the transmission capacity of the system.
Transient Stability of 11-Bus System Using SVC and Improvement of Voltage Profile in Transmission Line Using Series Compensator
doi:10.11648/j.epes.20140304.12
American Journal of Electrical Power and Energy Systems
2014-08-27
© Science Publishing Group
Ramlal Das
D. K. Tanti
Transient Stability of 11-Bus System Using SVC and Improvement of Voltage Profile in Transmission Line Using Series Compensator
3
4
85
85
2014-08-27
2014-08-27
10.11648/j.epes.20140304.12
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20140304.12
© Science Publishing Group
Smart Energy Management System for Utility Source and Photovoltaic Power System Using FPGA and ZigBee
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20140305.11
Renewable energy resources are being used to overcome energy shortage. From the point of view of energy management the interconnectivity of electric utility with renewable energy resources is difficult. Renewable energy resources need to be managed with electric utility. A Smart Energy Management System (SEMS) is designed and developed for monitoring an efficient load management of electric utility and photovoltaic power system is presented in this research. The design consists of an Energy Management Center (EMC) and Field Programmable Gate Array (FPGA). Energy Management Center shows the runtime data and also keeps the data log and offers control of the load shifting between utility source and photovoltaic power system. Analog to digital converter is used to interface the current and voltage sensors with FPGA. ZigBee is connected for wireless radio data transmission between the FPGA and energy management & monitoring center. The SEMS increases the efficiency of energy up to 10.5 percent in comparison with normal systems.
Renewable energy resources are being used to overcome energy shortage. From the point of view of energy management the interconnectivity of electric utility with renewable energy resources is difficult. Renewable energy resources need to be managed with electric utility. A Smart Energy Management System (SEMS) is designed and developed for monitoring an efficient load management of electric utility and photovoltaic power system is presented in this research. The design consists of an Energy Management Center (EMC) and Field Programmable Gate Array (FPGA). Energy Management Center shows the runtime data and also keeps the data log and offers control of the load shifting between utility source and photovoltaic power system. Analog to digital converter is used to interface the current and voltage sensors with FPGA. ZigBee is connected for wireless radio data transmission between the FPGA and energy management & monitoring center. The SEMS increases the efficiency of energy up to 10.5 percent in comparison with normal systems.
Smart Energy Management System for Utility Source and Photovoltaic Power System Using FPGA and ZigBee
doi:10.11648/j.epes.20140305.11
American Journal of Electrical Power and Energy Systems
2014-10-17
© Science Publishing Group
Yousaf H. Khattak
Tahir Mahmood
Khurshid Alam
Tahir Sarwar
Inayat Ullah
Hanif Ullah
Smart Energy Management System for Utility Source and Photovoltaic Power System Using FPGA and ZigBee
3
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94
94
2014-10-17
2014-10-17
10.11648/j.epes.20140305.11
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20140305.11
© Science Publishing Group
A Fuzzy Logic Distance Relay
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20140305.12
This paper presents a new approach to protect the transmission line by a design and implementation of distance relay using Fuzzy logic module. The proposed module uses sample of voltage and current signals to calculate line impedance (ZL). Simulation studies are performed and influence of changing system parameters such as type of faults like single line to ground fault, three phase to ground fault and double line to ground fault, also fault resistance and fault location; were taken the results show that the module respond in a very high speed relay, the performance of this distance relay is fast and accurate as compared with other relays the detection is with in less than 1⁄8 of the period.
This paper presents a new approach to protect the transmission line by a design and implementation of distance relay using Fuzzy logic module. The proposed module uses sample of voltage and current signals to calculate line impedance (ZL). Simulation studies are performed and influence of changing system parameters such as type of faults like single line to ground fault, three phase to ground fault and double line to ground fault, also fault resistance and fault location; were taken the results show that the module respond in a very high speed relay, the performance of this distance relay is fast and accurate as compared with other relays the detection is with in less than 1⁄8 of the period.
A Fuzzy Logic Distance Relay
doi:10.11648/j.epes.20140305.12
American Journal of Electrical Power and Energy Systems
2014-10-31
© Science Publishing Group
Maamoon Fadhel Al-Kababjie
Muhamed Nashwan Al-Kaleajie
A Fuzzy Logic Distance Relay
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100
100
2014-10-31
2014-10-31
10.11648/j.epes.20140305.12
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20140305.12
© Science Publishing Group
Research Methods for Power System Stability Using Adaptive Neural Fuzzy Inference Systems
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20140306.11
The performance of the Automatic Voltage Regulate (AVR) and the Power System Stability (PSS) methods may be degraded stability of the power system. This paper presents an Adaptive Neural Fuzzy Inference Systems (ANFIS) algorithm for stability of the power system, we use an Adaptive Network based Fuzzy Interference System architecture extended to response with multivariable systems. By using a hybrid learning method, the suggested ANFIS can setting structure diagram input - output based on both human knowledge and stipulated input-output data pairs. Simulation results present the convergence of the algorithm is improved.
The performance of the Automatic Voltage Regulate (AVR) and the Power System Stability (PSS) methods may be degraded stability of the power system. This paper presents an Adaptive Neural Fuzzy Inference Systems (ANFIS) algorithm for stability of the power system, we use an Adaptive Network based Fuzzy Interference System architecture extended to response with multivariable systems. By using a hybrid learning method, the suggested ANFIS can setting structure diagram input - output based on both human knowledge and stipulated input-output data pairs. Simulation results present the convergence of the algorithm is improved.
Research Methods for Power System Stability Using Adaptive Neural Fuzzy Inference Systems
doi:10.11648/j.epes.20140306.11
American Journal of Electrical Power and Energy Systems
2014-11-10
© Science Publishing Group
Phan Xuan Le
Nguyen Le Thai
Nguyen Le Minh Tri
Research Methods for Power System Stability Using Adaptive Neural Fuzzy Inference Systems
3
6
106
106
2014-11-10
2014-11-10
10.11648/j.epes.20140306.11
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20140306.11
© Science Publishing Group
Decomposition-Coordination Model and Algorithm for Parallel Calculation of Power System State Estimation Problem
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20140306.12
Power system state estimation is the process of computing a reliable estimate of the system state vector composed of bus voltages’ magnitudes and angles from telemetered measurements on the system. This estimate of the state vector provides the description of the system necessary for operation, security monitoring and control. Many methods are described in literature for solving the state estimation problem, the most important of which are the classical weighted least squares and the non-quadratic method. However, both showed drawbacks when it comes to application to large-scale power system networks. In this paper, a new method in the name of decomposition-coordination approach using the weighted least squares is introduced in solving the large-scale power system state estimation problem. The estimation criterion is reformulated; voltage measurement, real and reactive power injections, real and reactive power flows, and real and reactive power flows in tie-line models of a decomposed system are developed. Two level structure of solving the estimation problem is introduced. The first level solves the sub-problem using gradient procedure methods while the second level determines the interconnection variables using predictive method. The positive characteristic of the method is that the coordinator has little work of predicting interconnection variables instead of solving the state estimation problem. The method can be used to solve a multi-area state estimation using parallel or distributed processing architectures.
Power system state estimation is the process of computing a reliable estimate of the system state vector composed of bus voltages’ magnitudes and angles from telemetered measurements on the system. This estimate of the state vector provides the description of the system necessary for operation, security monitoring and control. Many methods are described in literature for solving the state estimation problem, the most important of which are the classical weighted least squares and the non-quadratic method. However, both showed drawbacks when it comes to application to large-scale power system networks. In this paper, a new method in the name of decomposition-coordination approach using the weighted least squares is introduced in solving the large-scale power system state estimation problem. The estimation criterion is reformulated; voltage measurement, real and reactive power injections, real and reactive power flows, and real and reactive power flows in tie-line models of a decomposed system are developed. Two level structure of solving the estimation problem is introduced. The first level solves the sub-problem using gradient procedure methods while the second level determines the interconnection variables using predictive method. The positive characteristic of the method is that the coordinator has little work of predicting interconnection variables instead of solving the state estimation problem. The method can be used to solve a multi-area state estimation using parallel or distributed processing architectures.
Decomposition-Coordination Model and Algorithm for Parallel Calculation of Power System State Estimation Problem
doi:10.11648/j.epes.20140306.12
American Journal of Electrical Power and Energy Systems
2014-12-10
© Science Publishing Group
Mashauri Adam Kusekwa
Decomposition-Coordination Model and Algorithm for Parallel Calculation of Power System State Estimation Problem
3
6
118
118
2014-12-10
2014-12-10
10.11648/j.epes.20140306.12
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20140306.12
© Science Publishing Group
Detection and Identification of PQ Disturbances Using S-Transform and Artificial Intelligent Technique
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20150401.11
This paper proposes a new technique based on S-transform time-frequency analysis and Fuzzy expert system for classifying power quality (PQ) disturbances. The S-transform is a new time frequency analysis method. It has the features of both continuous wavelet transform (CWT) and short time Fourier transform (STFT). Through S-transform time-frequency analysis, a set of feature components are extracted for identifying PQ disturbances such as; the amplitude of the S-transform matrix and the total harmonic distortion (THD). The two parameters are the inputs to Fuzzy-expert system that uses some rules on these inputs to characterize the PQ events in the captured waveform (e.g. sag, swell, interruption, surge, sag with harmonic and swell with harmonic). Several simulation using Matlab environment and practical data are used to validate the proposed technique. The results depict that the proposed technique has the ability to accurately identify and characterize PQ disturbances.
This paper proposes a new technique based on S-transform time-frequency analysis and Fuzzy expert system for classifying power quality (PQ) disturbances. The S-transform is a new time frequency analysis method. It has the features of both continuous wavelet transform (CWT) and short time Fourier transform (STFT). Through S-transform time-frequency analysis, a set of feature components are extracted for identifying PQ disturbances such as; the amplitude of the S-transform matrix and the total harmonic distortion (THD). The two parameters are the inputs to Fuzzy-expert system that uses some rules on these inputs to characterize the PQ events in the captured waveform (e.g. sag, swell, interruption, surge, sag with harmonic and swell with harmonic). Several simulation using Matlab environment and practical data are used to validate the proposed technique. The results depict that the proposed technique has the ability to accurately identify and characterize PQ disturbances.
Detection and Identification of PQ Disturbances Using S-Transform and Artificial Intelligent Technique
doi:10.11648/j.epes.20150401.11
American Journal of Electrical Power and Energy Systems
2015-03-02
© Science Publishing Group
Ahmed Hussain Elmetwaly
Abdelazeem Abdallah Abdelsalam
Azza Ahmed Eldessouky
Abdelhay Ahmed Sallam
Detection and Identification of PQ Disturbances Using S-Transform and Artificial Intelligent Technique
4
1
9
9
2015-03-02
2015-03-02
10.11648/j.epes.20150401.11
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20150401.11
© Science Publishing Group
Factors Affecting the Harmonics Generated by a Group of CFLs: Experimental Measurements
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20150401.12
The penetration of nonlinear loads on power systems increases the harmonics that can cause detrimental problems to power systems such as an increase in voltage distortion, equipment failure, system resonance, increase system losses and decrease system efficiency. Many factors affect the harmonics produced by nonlinear loads. Hence, the aim of this paper is to evaluate the impacts of system voltage, impedance, frequency and background voltage distortion on the harmonics generated by a group of Compact Fluorescent Lamps (CFLs). Experimental measurements are performed for this purpose.
The penetration of nonlinear loads on power systems increases the harmonics that can cause detrimental problems to power systems such as an increase in voltage distortion, equipment failure, system resonance, increase system losses and decrease system efficiency. Many factors affect the harmonics produced by nonlinear loads. Hence, the aim of this paper is to evaluate the impacts of system voltage, impedance, frequency and background voltage distortion on the harmonics generated by a group of Compact Fluorescent Lamps (CFLs). Experimental measurements are performed for this purpose.
Factors Affecting the Harmonics Generated by a Group of CFLs: Experimental Measurements
doi:10.11648/j.epes.20150401.12
American Journal of Electrical Power and Energy Systems
2015-03-04
© Science Publishing Group
Muhyaddin J. H. Rawa
David W. P. Thomas
Factors Affecting the Harmonics Generated by a Group of CFLs: Experimental Measurements
4
1
16
16
2015-03-04
2015-03-04
10.11648/j.epes.20150401.12
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20150401.12
© Science Publishing Group
Analysis of Partial Discharge Patterns for Generator Stator Windings
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20150402.11
Forced outage of generators due to stator winding insulation failure can result in significant financial loss because of the high cost repair and loss of production. In recent years, the demand for insulation diagnosis is increasing to prevent unexpected failures, as the capacity of generators has increased. Insulation diagnosis is composed of the insulation resistance measurement, polarization index measurement, dissipation factor (DF) tip-up test, AC current increasing ratio measurement, and the partial discharge (PD) measurement. In this paper, the results of the PD measurement and PD pulse pattern analysis performed on a healthy generator and two generators that experienced dielectric breakdown failure during operation is presented.
Forced outage of generators due to stator winding insulation failure can result in significant financial loss because of the high cost repair and loss of production. In recent years, the demand for insulation diagnosis is increasing to prevent unexpected failures, as the capacity of generators has increased. Insulation diagnosis is composed of the insulation resistance measurement, polarization index measurement, dissipation factor (DF) tip-up test, AC current increasing ratio measurement, and the partial discharge (PD) measurement. In this paper, the results of the PD measurement and PD pulse pattern analysis performed on a healthy generator and two generators that experienced dielectric breakdown failure during operation is presented.
Analysis of Partial Discharge Patterns for Generator Stator Windings
doi:10.11648/j.epes.20150402.11
American Journal of Electrical Power and Energy Systems
2015-03-12
© Science Publishing Group
Tae-Sik Kong
Hee-Dong Kim
Tae-Sung Park
Kyeong-Yeol Kim
Ho-Yol Kim
Analysis of Partial Discharge Patterns for Generator Stator Windings
4
2
22
22
2015-03-12
2015-03-12
10.11648/j.epes.20150402.11
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20150402.11
© Science Publishing Group
Trapezoidal Control of a Coiled Synchronous Motor Optimizing Electric Vehicle Consumption
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.s.2015040201.13
In this paper, we present a systemic trapezoidal control methodology of a coiled rotor axial flux synchronous motor dedicated to electric traction, taking into account of several constraints such as the speed limit, the energy saving, the cost of the power chain and the reliability of the whole system. Indeed the control law developed allows to impose the electromotive forces in phase with the phase currents, which reduces vehicle consumption. Also based on the technique of overfluxing during periods of high acceleration to reduce the phase current of the motor and then the vehicle consumption. This optimization technique is based on the increase of the excitation current for a given torque, thereby increasing the electric motor constant. Therefore, the phase current is lowered leading to a reduction in consumption. During the phases of constant speed operation and high decelerations, the value of the excitation current is calculated iteratively to minimize the consummation. Finally, the results obtained are with good level which encourages the electronic integration phase of this control law.
In this paper, we present a systemic trapezoidal control methodology of a coiled rotor axial flux synchronous motor dedicated to electric traction, taking into account of several constraints such as the speed limit, the energy saving, the cost of the power chain and the reliability of the whole system. Indeed the control law developed allows to impose the electromotive forces in phase with the phase currents, which reduces vehicle consumption. Also based on the technique of overfluxing during periods of high acceleration to reduce the phase current of the motor and then the vehicle consumption. This optimization technique is based on the increase of the excitation current for a given torque, thereby increasing the electric motor constant. Therefore, the phase current is lowered leading to a reduction in consumption. During the phases of constant speed operation and high decelerations, the value of the excitation current is calculated iteratively to minimize the consummation. Finally, the results obtained are with good level which encourages the electronic integration phase of this control law.
Trapezoidal Control of a Coiled Synchronous Motor Optimizing Electric Vehicle Consumption
doi:10.11648/j.epes.s.2015040201.13
American Journal of Electrical Power and Energy Systems
2014-11-06
© Science Publishing Group
Aicha Khlissa
Houcine Marouani
Souhir Tounsi
Trapezoidal Control of a Coiled Synchronous Motor Optimizing Electric Vehicle Consumption
4
2
25
25
2014-11-06
2014-11-06
10.11648/j.epes.s.2015040201.13
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.s.2015040201.13
© Science Publishing Group
Systemic Design and Modelling of a Coiled Rotor Synchronous Motor Dedicated to Electric Traction
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.s.2015040201.11
In this paper, we present a methodology of design and modeling of the controlling parameters of synchronous motor with wound rotor, based on the analytical method. This methodology ensures a wide operating speed range of electric vehicles. It takes into account several physical and technological constraints. The model is highly parameterized and quickly helps to provide the dimensions and power train controlling parameters values by varying the mechanical characteristics of the vehicle. It is compatible with all brands of electric vehicle power with single motor. The analytical modeling approach is validated entirely by the finite element method.
In this paper, we present a methodology of design and modeling of the controlling parameters of synchronous motor with wound rotor, based on the analytical method. This methodology ensures a wide operating speed range of electric vehicles. It takes into account several physical and technological constraints. The model is highly parameterized and quickly helps to provide the dimensions and power train controlling parameters values by varying the mechanical characteristics of the vehicle. It is compatible with all brands of electric vehicle power with single motor. The analytical modeling approach is validated entirely by the finite element method.
Systemic Design and Modelling of a Coiled Rotor Synchronous Motor Dedicated to Electric Traction
doi:10.11648/j.epes.s.2015040201.11
American Journal of Electrical Power and Energy Systems
2014-11-05
© Science Publishing Group
Aicha Khlissa
Houcine Marouani
Souhir Tounsi
Systemic Design and Modelling of a Coiled Rotor Synchronous Motor Dedicated to Electric Traction
4
2
7
7
2014-11-05
2014-11-05
10.11648/j.epes.s.2015040201.11
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.s.2015040201.11
© Science Publishing Group
Methodology for Electrothermal Characterization of Permanent Magnet Motor and Its Equivalent to Coiled Rotor
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.s.2015040201.12
In this paper, we present a methodology for electrothermal characterization of two configurations: permanent magnet motor and its equivalent to wound rotor. This modeling approach is in the aim to evaluating the different temperatures in different active parts of the two configurations, to choose the type and characteristics of the cooling system to use. A comparative study between the two solutions is presented.
In this paper, we present a methodology for electrothermal characterization of two configurations: permanent magnet motor and its equivalent to wound rotor. This modeling approach is in the aim to evaluating the different temperatures in different active parts of the two configurations, to choose the type and characteristics of the cooling system to use. A comparative study between the two solutions is presented.
Methodology for Electrothermal Characterization of Permanent Magnet Motor and Its Equivalent to Coiled Rotor
doi:10.11648/j.epes.s.2015040201.12
American Journal of Electrical Power and Energy Systems
2014-11-06
© Science Publishing Group
Souhir Tounsi
Methodology for Electrothermal Characterization of Permanent Magnet Motor and Its Equivalent to Coiled Rotor
4
2
16
16
2014-11-06
2014-11-06
10.11648/j.epes.s.2015040201.12
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.s.2015040201.12
© Science Publishing Group
Determination of the Parameters of the Synchronous Motor with Dual Excitation
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.s.2015040201.14
This paper describes the electric parameters determination for Synchronous Motor with Dual Excitation, using the joined method analytic/finite elements. Indeed several models of mutual and principal inductances and electric motor constant are developed analytically and validated by the finite elements method. These models are fortunately parameterized allowing to the formulation of several optimization problems such as the motor ripple torque.
This paper describes the electric parameters determination for Synchronous Motor with Dual Excitation, using the joined method analytic/finite elements. Indeed several models of mutual and principal inductances and electric motor constant are developed analytically and validated by the finite elements method. These models are fortunately parameterized allowing to the formulation of several optimization problems such as the motor ripple torque.
Determination of the Parameters of the Synchronous Motor with Dual Excitation
doi:10.11648/j.epes.s.2015040201.14
American Journal of Electrical Power and Energy Systems
2014-11-06
© Science Publishing Group
Moez Hadj Kacem
Souhir Tounsi
Rafik Neji
Determination of the Parameters of the Synchronous Motor with Dual Excitation
4
2
32
32
2014-11-06
2014-11-06
10.11648/j.epes.s.2015040201.14
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.s.2015040201.14
© Science Publishing Group
Modelling and Control of Electric Vehicle Power Train
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.s.2015040201.15
This paper describes the choice and the design of electric vehicles power train structure reducing considerably the energy consumption. Indeed The converter feeding the motor is naturally with IGBTs leading on the one hand to important losses and on the other hand to many control problems. This structure is replaced by another with electromagnetic switch leading to a strong reduction of the losses and to an increase of the electric motor control reliability. The power train contains an energy recuperation system during the deceleration phases, where the motor functions in generator. The motor is controlled by vector control method maintaining the current Id equal to zero, leading to the maintain of the current in phase with electromotive force, what also leads to the reduction of the energy consumption. A supper-capacity is added in parallel with the energy accumulator leads to an increase of the storage energy capacity. All these factors lead to the increase of the autonomy for a known stocked energy.
This paper describes the choice and the design of electric vehicles power train structure reducing considerably the energy consumption. Indeed The converter feeding the motor is naturally with IGBTs leading on the one hand to important losses and on the other hand to many control problems. This structure is replaced by another with electromagnetic switch leading to a strong reduction of the losses and to an increase of the electric motor control reliability. The power train contains an energy recuperation system during the deceleration phases, where the motor functions in generator. The motor is controlled by vector control method maintaining the current Id equal to zero, leading to the maintain of the current in phase with electromotive force, what also leads to the reduction of the energy consumption. A supper-capacity is added in parallel with the energy accumulator leads to an increase of the storage energy capacity. All these factors lead to the increase of the autonomy for a known stocked energy.
Modelling and Control of Electric Vehicle Power Train
doi:10.11648/j.epes.s.2015040201.15
American Journal of Electrical Power and Energy Systems
2014-12-27
© Science Publishing Group
Souhir Tounsi
Modelling and Control of Electric Vehicle Power Train
4
2
41
41
2014-12-27
2014-12-27
10.11648/j.epes.s.2015040201.15
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.s.2015040201.15
© Science Publishing Group
Design and Optimization of Axial Flux Brushless DC Motor Dedicated to Electric Traction
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.s.2015040201.16
In this paper, we present an analytic model of the whole motor converter taking in account of several systemic and physical constraints. Being couple to a model of the losses of the power chain and to a model of the mass of the motor, this analytic model puts a problem of conjoined optimization of the consumption and the cost of the motor. This problem is solved by genetic algorithms method.
In this paper, we present an analytic model of the whole motor converter taking in account of several systemic and physical constraints. Being couple to a model of the losses of the power chain and to a model of the mass of the motor, this analytic model puts a problem of conjoined optimization of the consumption and the cost of the motor. This problem is solved by genetic algorithms method.
Design and Optimization of Axial Flux Brushless DC Motor Dedicated to Electric Traction
doi:10.11648/j.epes.s.2015040201.16
American Journal of Electrical Power and Energy Systems
2015-02-05
© Science Publishing Group
Mariem Ben Amor
Souhir Tounsi
Mohamed Salim Bouhlel
Design and Optimization of Axial Flux Brushless DC Motor Dedicated to Electric Traction
4
2
48
48
2015-02-05
2015-02-05
10.11648/j.epes.s.2015040201.16
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.s.2015040201.16
© Science Publishing Group
Marketing and Energy Pricing
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20150403.11
Climate protection, energy efficiency, saving of the fossil fuels is important for our society. Many countries adopted the programs for solving these tasks. These programs include many technical measures for climate protection, saving of fossil fuels and energy efficiency. However not only technical measures, but also economical measures have an impact on performance of these important tasks. In this article I will try to show that application of the basic marketing principles in pricing for energy positively affects the efficiency of the use of energy recourses .For long time the energy companies had a monopoly in the supply of energy to consumers. Because the energy tariffs depend mainly from their overall needs. Taking into account common society tasks, the energy sector needs of new approaches for energy pricing. Principles of marketing can help for energy companies to be more flexible in the dealing with consumers and to establish energy tariffs according to individual conditions of energy supply. Using the general principles of marketing in energy industry you can create a flexible system of prices for energy which will be able to control the scheme of energy consumption, will be able to provide the opportunity for consumers to choose quality, security and reliability of services. Implementation of the main principles of marketing in energy pricing allows to move from the general energy tariff for large groups of consumers to the individual tariff for each consumer. f schemes and conditions of the supply of energy will give the additional saving of energy. Having opportunities to choose, the consumers will try to optimize their own energy consumption and will choose a time, when he will be able to pay for more modern equipments for its energy supply. So, using the general principles of marketing in energy pricing we will try to solve the problems of middle class population, where payments for energy are essential for theirs budget.
Climate protection, energy efficiency, saving of the fossil fuels is important for our society. Many countries adopted the programs for solving these tasks. These programs include many technical measures for climate protection, saving of fossil fuels and energy efficiency. However not only technical measures, but also economical measures have an impact on performance of these important tasks. In this article I will try to show that application of the basic marketing principles in pricing for energy positively affects the efficiency of the use of energy recourses .For long time the energy companies had a monopoly in the supply of energy to consumers. Because the energy tariffs depend mainly from their overall needs. Taking into account common society tasks, the energy sector needs of new approaches for energy pricing. Principles of marketing can help for energy companies to be more flexible in the dealing with consumers and to establish energy tariffs according to individual conditions of energy supply. Using the general principles of marketing in energy industry you can create a flexible system of prices for energy which will be able to control the scheme of energy consumption, will be able to provide the opportunity for consumers to choose quality, security and reliability of services. Implementation of the main principles of marketing in energy pricing allows to move from the general energy tariff for large groups of consumers to the individual tariff for each consumer. f schemes and conditions of the supply of energy will give the additional saving of energy. Having opportunities to choose, the consumers will try to optimize their own energy consumption and will choose a time, when he will be able to pay for more modern equipments for its energy supply. So, using the general principles of marketing in energy pricing we will try to solve the problems of middle class population, where payments for energy are essential for theirs budget.
Marketing and Energy Pricing
doi:10.11648/j.epes.20150403.11
American Journal of Electrical Power and Energy Systems
2015-05-26
© Science Publishing Group
Valentyna Novosad
Marketing and Energy Pricing
4
3
28
28
2015-05-26
2015-05-26
10.11648/j.epes.20150403.11
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20150403.11
© Science Publishing Group
An Experimental Approach to Determine the Effect of Different Orientation of Dimples on Flat Plates
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20150403.12
Dimples play a very important role in the heat transfer enhancement of electronic cooling systems. In the current paper, the flow and heat transfer characteristics of spherical dimples of non uniform diameter were investigated. The experiment was carried out under laminar forced convection conditions using air as a working fluid. The overall Nusselt number and heat transfer coefficient at different dimple structures were obtained for various inlet air flow rates. From the obtained results, it was observed that the heat transfer coefficient and Nusselt number were high for the plate in which the diameter of dimples increases centrally in the direction of flow as compared to the other cases.
Dimples play a very important role in the heat transfer enhancement of electronic cooling systems. In the current paper, the flow and heat transfer characteristics of spherical dimples of non uniform diameter were investigated. The experiment was carried out under laminar forced convection conditions using air as a working fluid. The overall Nusselt number and heat transfer coefficient at different dimple structures were obtained for various inlet air flow rates. From the obtained results, it was observed that the heat transfer coefficient and Nusselt number were high for the plate in which the diameter of dimples increases centrally in the direction of flow as compared to the other cases.
An Experimental Approach to Determine the Effect of Different Orientation of Dimples on Flat Plates
doi:10.11648/j.epes.20150403.12
American Journal of Electrical Power and Energy Systems
2015-05-29
© Science Publishing Group
Amjad Khan
Mohammed Zakir Bellary
Mohammad Ziaullah
Abdul Razak Kaladgi
An Experimental Approach to Determine the Effect of Different Orientation of Dimples on Flat Plates
4
3
33
33
2015-05-29
2015-05-29
10.11648/j.epes.20150403.12
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20150403.12
© Science Publishing Group
Design and Modeling of a Synchronous Renewable Energy Generation System
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.s.2015040301.12
In this paper we describe a design and modeling methodology of synchronous generation system for renewable energy. Our choice fell on a synchronous generator structure with permanent magnet and axial flux simple to manufacturing to reduce the production cost of the energy generation system. The modeling approach presented leads to a scientific results of high level and opens the line of research to the study of the optimization of the energy recovered by the energy accumulator.
In this paper we describe a design and modeling methodology of synchronous generation system for renewable energy. Our choice fell on a synchronous generator structure with permanent magnet and axial flux simple to manufacturing to reduce the production cost of the energy generation system. The modeling approach presented leads to a scientific results of high level and opens the line of research to the study of the optimization of the energy recovered by the energy accumulator.
Design and Modeling of a Synchronous Renewable Energy Generation System
doi:10.11648/j.epes.s.2015040301.12
American Journal of Electrical Power and Energy Systems
2015-01-19
© Science Publishing Group
Wiem Nhidi
Souhir Tounsi
Mohamed Salim Bouhlel
Design and Modeling of a Synchronous Renewable Energy Generation System
4
3
11
11
2015-01-19
2015-01-19
10.11648/j.epes.s.2015040301.12
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.s.2015040301.12
© Science Publishing Group
Design and Optimization of Axial Flux Brushless DC Generator Dedicated to Generation of Renewable Energy
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.s.2015040301.11
In this paper, we present a design model of permanent magnet generator dedicated to generate renewable energy, taking in account of several systemic and physical constraints. Being couple to a model of the losses of the power chain and to a model of the mass of the generator, this analytic model puts a problem of conjoined optimization of the recovered energy and the cost of the generator. This problem is solved by genetic algorithms method.
In this paper, we present a design model of permanent magnet generator dedicated to generate renewable energy, taking in account of several systemic and physical constraints. Being couple to a model of the losses of the power chain and to a model of the mass of the generator, this analytic model puts a problem of conjoined optimization of the recovered energy and the cost of the generator. This problem is solved by genetic algorithms method.
Design and Optimization of Axial Flux Brushless DC Generator Dedicated to Generation of Renewable Energy
doi:10.11648/j.epes.s.2015040301.11
American Journal of Electrical Power and Energy Systems
2015-01-19
© Science Publishing Group
Souhir Tounsi
Design and Optimization of Axial Flux Brushless DC Generator Dedicated to Generation of Renewable Energy
4
3
5
5
2015-01-19
2015-01-19
10.11648/j.epes.s.2015040301.11
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.s.2015040301.11
© Science Publishing Group
An Experimental Study on Heat Transfer Enhancement of Flat Plates Using Dimples
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20150404.11
Dimples play a very important role in heat transfer enhancement of electronic cooling systems. In the current paper, the fluid flow and heat transfer characteristics of spherical dimples at different angle of orientation from the centre with apex facing the inlet were investigated. The experiment was carried out for laminar Natural convection conditions with air as a working fluid. The overall Nusselt numbers and heat transfer coefficient at different orientation angle of dimples were obtained. From the obtained results, it was observed that the Nusselt numbers and heat transfer coefficient increases with decrease in the orientation angle of dimples.
Dimples play a very important role in heat transfer enhancement of electronic cooling systems. In the current paper, the fluid flow and heat transfer characteristics of spherical dimples at different angle of orientation from the centre with apex facing the inlet were investigated. The experiment was carried out for laminar Natural convection conditions with air as a working fluid. The overall Nusselt numbers and heat transfer coefficient at different orientation angle of dimples were obtained. From the obtained results, it was observed that the Nusselt numbers and heat transfer coefficient increases with decrease in the orientation angle of dimples.
An Experimental Study on Heat Transfer Enhancement of Flat Plates Using Dimples
doi:10.11648/j.epes.20150404.11
American Journal of Electrical Power and Energy Systems
2015-05-29
© Science Publishing Group
Amjad Khan
Mohammed Zakir Bellary
Mohammad Ziaullah
Abdul Razak Kaladgi
An Experimental Study on Heat Transfer Enhancement of Flat Plates Using Dimples
4
4
38
38
2015-05-29
2015-05-29
10.11648/j.epes.20150404.11
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20150404.11
© Science Publishing Group
Influence of Power Quality Problem on the Performance of an Induction Motor
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20150404.12
This paper presents the application of MATLAB® Simulink as a useful tool for predicting the performance of an induction motor. The influence of power quality problem on the performance of an induction motor is critically investigated. Mathematical modelling of an induction motor subjected to an unsymmetrical voltage conditions are presented. The results obtained from the simulation reveal the presence of rotor noise and vibration during operation of induction motor under voltage unbalance.
This paper presents the application of MATLAB® Simulink as a useful tool for predicting the performance of an induction motor. The influence of power quality problem on the performance of an induction motor is critically investigated. Mathematical modelling of an induction motor subjected to an unsymmetrical voltage conditions are presented. The results obtained from the simulation reveal the presence of rotor noise and vibration during operation of induction motor under voltage unbalance.
Influence of Power Quality Problem on the Performance of an Induction Motor
doi:10.11648/j.epes.20150404.12
American Journal of Electrical Power and Energy Systems
2015-06-02
© Science Publishing Group
Amaize Aigboviosa Peter
Ignatius Kema Okakwu
Emmanuel Seun Oluwasogo
Akintunde Samson Alayande
Abel Ehimen Airoboman
Influence of Power Quality Problem on the Performance of an Induction Motor
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4
44
44
2015-06-02
2015-06-02
10.11648/j.epes.20150404.12
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20150404.12
© Science Publishing Group
Smart Generator Monitoring System in Industry Using Microcontroller
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20150404.13
The electrical power systems are highly non-linear, extremely huge and complex networks. On the other hand, all the developed and countries have not sufficient supply of power. My Project focuses the detection of power failure and takes reflex action to solve the problem with help of GSM communication. The power failure will be detect by relay, and it communicates to Microcontroller to alerts the authorized person. In addition to that, parameters of Generator like Fuel level, Oil level, Temperature, battery status, etc., are monitored and communicated to authorized person. The acquired parameters are processed and recorded in the system memory. If there is any abnormality in their process, according to some predefined instruction and policies that are stored on the embedded system EEPROM then GSM alerts to concerned person immediately.
The electrical power systems are highly non-linear, extremely huge and complex networks. On the other hand, all the developed and countries have not sufficient supply of power. My Project focuses the detection of power failure and takes reflex action to solve the problem with help of GSM communication. The power failure will be detect by relay, and it communicates to Microcontroller to alerts the authorized person. In addition to that, parameters of Generator like Fuel level, Oil level, Temperature, battery status, etc., are monitored and communicated to authorized person. The acquired parameters are processed and recorded in the system memory. If there is any abnormality in their process, according to some predefined instruction and policies that are stored on the embedded system EEPROM then GSM alerts to concerned person immediately.
Smart Generator Monitoring System in Industry Using Microcontroller
doi:10.11648/j.epes.20150404.13
American Journal of Electrical Power and Energy Systems
2015-06-06
© Science Publishing Group
S. Boopathi
M. Jagadeeshraja
L. Manivannan
M. Dhanasu
Smart Generator Monitoring System in Industry Using Microcontroller
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4
50
50
2015-06-06
2015-06-06
10.11648/j.epes.20150404.13
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20150404.13
© Science Publishing Group
Research About China’s Electricity Market Reform Based on Hall's Three Dimensions Structure Model
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20150404.14
To promote the development of the national economy, how to improve the electricity market and establish effective competition mechanisms becomes the focus of the new round of electricity market reform in China. Referring to the basic thoughts of Hall’s three dimensions structure theory of system engineering discipline, and analyzing from three levels of logic dimension, time dimension and knowledge dimension, this paper provides recommends on the implementation of electricity market reform in China. Through the compared analysis of two reform programs in the logic dimension, we obtain the modified electricity reform program for current China that is keeping the grid company having the whole business of transmission and distribution, establishing electricity sale companies, establishing power trading center and promoting power direct trading.
To promote the development of the national economy, how to improve the electricity market and establish effective competition mechanisms becomes the focus of the new round of electricity market reform in China. Referring to the basic thoughts of Hall’s three dimensions structure theory of system engineering discipline, and analyzing from three levels of logic dimension, time dimension and knowledge dimension, this paper provides recommends on the implementation of electricity market reform in China. Through the compared analysis of two reform programs in the logic dimension, we obtain the modified electricity reform program for current China that is keeping the grid company having the whole business of transmission and distribution, establishing electricity sale companies, establishing power trading center and promoting power direct trading.
Research About China’s Electricity Market Reform Based on Hall's Three Dimensions Structure Model
doi:10.11648/j.epes.20150404.14
American Journal of Electrical Power and Energy Systems
2015-07-25
© Science Publishing Group
Jun Dong
Rong Li
Research About China’s Electricity Market Reform Based on Hall's Three Dimensions Structure Model
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4
56
56
2015-07-25
2015-07-25
10.11648/j.epes.20150404.14
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20150404.14
© Science Publishing Group
Reduction of Total Harmonic Distortion for A Three Phase Fault in a Distribution Network by Using PID, Fuzzy & Hybrid PID-Fuzzy Controller Based DVR
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20150405.11
The use of electric energy is, in developed countries around the world, a natural part of life. It is used everywhere for living, work and travelling, at any residence, commercial building, industry and so on. The number of electrical devices connected to the power system, during the century, has increased enormously, with the main increase having been during the last 20 – 25 years. The total power demand has also increased but not at the same rate as the number of devices connected. This is due to more power efficient equipment being used, both for new devices and older replaced devices. There are differences for different voltage levels and of course a large variation among different countries. Due to complexity of power system combined with other factors such as increasing susceptibility of equipment. With electricity demand growing, low power quality is on the rise & becoming notoriously difficult to remedy [1]. Distribution system needs to be protected against voltage sags, dips & swells that adversely affect the reliability & quality of power supply at the utility end. The Dynamic voltage restorer (DVR), which has been utilized in optimized way so as to improve performance, has been put under new technique of sag detection. The applications of Fuzzy logic controller have taken new dimension in various fields. In this paper, the essentials of control scheme with immediate voltage generation to regulate the unbalance voltage phase in three phase system and a tested method to improve the reliability within the distribution system is presented. The 13kV distribution system is having a three phase fault which controlled by non-linear techniques and their performance levels are compared. The capability of DVR is demonstrated using MATLAB/SIMULINK simulation models. This paper emphasizes the importance of DVR application for better power quality, by comparing the mitigated voltage and current THD values among PID, Fuzzy, PID-Fuzzy have been compared on account of the amount of compensation being injected into the system under voltage sag condition for non-linear loads.
The use of electric energy is, in developed countries around the world, a natural part of life. It is used everywhere for living, work and travelling, at any residence, commercial building, industry and so on. The number of electrical devices connected to the power system, during the century, has increased enormously, with the main increase having been during the last 20 – 25 years. The total power demand has also increased but not at the same rate as the number of devices connected. This is due to more power efficient equipment being used, both for new devices and older replaced devices. There are differences for different voltage levels and of course a large variation among different countries. Due to complexity of power system combined with other factors such as increasing susceptibility of equipment. With electricity demand growing, low power quality is on the rise & becoming notoriously difficult to remedy [1]. Distribution system needs to be protected against voltage sags, dips & swells that adversely affect the reliability & quality of power supply at the utility end. The Dynamic voltage restorer (DVR), which has been utilized in optimized way so as to improve performance, has been put under new technique of sag detection. The applications of Fuzzy logic controller have taken new dimension in various fields. In this paper, the essentials of control scheme with immediate voltage generation to regulate the unbalance voltage phase in three phase system and a tested method to improve the reliability within the distribution system is presented. The 13kV distribution system is having a three phase fault which controlled by non-linear techniques and their performance levels are compared. The capability of DVR is demonstrated using MATLAB/SIMULINK simulation models. This paper emphasizes the importance of DVR application for better power quality, by comparing the mitigated voltage and current THD values among PID, Fuzzy, PID-Fuzzy have been compared on account of the amount of compensation being injected into the system under voltage sag condition for non-linear loads.
Reduction of Total Harmonic Distortion for A Three Phase Fault in a Distribution Network by Using PID, Fuzzy & Hybrid PID-Fuzzy Controller Based DVR
doi:10.11648/j.epes.20150405.11
American Journal of Electrical Power and Energy Systems
2015-07-20
© Science Publishing Group
Danish Chaudhary
Aziz Ahmed
Anwar Shahzad Siddiqui
Reduction of Total Harmonic Distortion for A Three Phase Fault in a Distribution Network by Using PID, Fuzzy & Hybrid PID-Fuzzy Controller Based DVR
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70
70
2015-07-20
2015-07-20
10.11648/j.epes.20150405.11
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20150405.11
© Science Publishing Group
CSP-Biogas Combined Microgrid System for Rural and Remote Areas of Bangladesh
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20150405.12
Power plays a vital role for a developing country like Bangladesh. Like the rest of the countries of the world, the demand of power is rising day by day in our country. But Bangladesh has been facing electricity shortage for many years. In our country, a major portion of total population still does not have the access to electricity. For becoming a developed country, Bangladesh has to overcome the problem of power crisis. Renewable energy can be a great source to solve this problem. Already some government and non-government organization are working on renewable sources like solar energy, bioenergy, wind energy, etc. In this paper we mainly focused to develop and implement microgrid system with CSP-biogas combined power plant for providing electricity in rural and remote areas of Bangladesh
Power plays a vital role for a developing country like Bangladesh. Like the rest of the countries of the world, the demand of power is rising day by day in our country. But Bangladesh has been facing electricity shortage for many years. In our country, a major portion of total population still does not have the access to electricity. For becoming a developed country, Bangladesh has to overcome the problem of power crisis. Renewable energy can be a great source to solve this problem. Already some government and non-government organization are working on renewable sources like solar energy, bioenergy, wind energy, etc. In this paper we mainly focused to develop and implement microgrid system with CSP-biogas combined power plant for providing electricity in rural and remote areas of Bangladesh
CSP-Biogas Combined Microgrid System for Rural and Remote Areas of Bangladesh
doi:10.11648/j.epes.20150405.12
American Journal of Electrical Power and Energy Systems
2015-08-13
© Science Publishing Group
Atiqur Rahman
Miftah Al Karim
CSP-Biogas Combined Microgrid System for Rural and Remote Areas of Bangladesh
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5
76
76
2015-08-13
2015-08-13
10.11648/j.epes.20150405.12
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.20150405.12
© Science Publishing Group
Design of Voice Coil Type Linear Actuator for Hydraulic Servo Valve Operation
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.s.2015040501.11
In this study, we proposed governing equations for voice coil type linear actuator for valve operation. We draw up governing equations which are composed by combination of electromagnetic theories and empirical knowledge, and deduct the values of major design factors by use of them. We suggested the governing equations to determine the values of design parameters of linear actuator as like bobbin size, length of yoke and plunger and turn number of coil. And we also calculated the life test time of linear actuator for verification of reliability of the prototype. In addition, for reducing the life test time, the acceleration model of linear actuator is proposed and the acceleration factor is calculated considering the field operating conditions. Finally we have proven the propriety of the governing equations by accelerated life test using the valve assembly adopted the voice coil type linear actuator prototype.
In this study, we proposed governing equations for voice coil type linear actuator for valve operation. We draw up governing equations which are composed by combination of electromagnetic theories and empirical knowledge, and deduct the values of major design factors by use of them. We suggested the governing equations to determine the values of design parameters of linear actuator as like bobbin size, length of yoke and plunger and turn number of coil. And we also calculated the life test time of linear actuator for verification of reliability of the prototype. In addition, for reducing the life test time, the acceleration model of linear actuator is proposed and the acceleration factor is calculated considering the field operating conditions. Finally we have proven the propriety of the governing equations by accelerated life test using the valve assembly adopted the voice coil type linear actuator prototype.
Design of Voice Coil Type Linear Actuator for Hydraulic Servo Valve Operation
doi:10.11648/j.epes.s.2015040501.11
American Journal of Electrical Power and Energy Systems
2015-09-10
© Science Publishing Group
Baek Ju Sung
Design of Voice Coil Type Linear Actuator for Hydraulic Servo Valve Operation
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8
8
2015-09-10
2015-09-10
10.11648/j.epes.s.2015040501.11
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.s.2015040501.11
© Science Publishing Group
A Comparative Analysis of Cogging Torque Reduction in BLDC Motor Using Bifurcation and Slot Opening Variation
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.s.2015040501.12
The utility of PM-BLDC machines is extending its tentacles in industrial arena. The key features of BLDC machines include high starting torque density and extending speed range, though the cogging torque is a threat for its performance. Various techniques have been devised to minimize cogging torque, out of which two approaches Bifurcation and Slot Opening methods have been focused in this paper. Usage of SPEED Software in comparing the reduction of cogging torque for the above two techniques is the highlight of this paper.
The utility of PM-BLDC machines is extending its tentacles in industrial arena. The key features of BLDC machines include high starting torque density and extending speed range, though the cogging torque is a threat for its performance. Various techniques have been devised to minimize cogging torque, out of which two approaches Bifurcation and Slot Opening methods have been focused in this paper. Usage of SPEED Software in comparing the reduction of cogging torque for the above two techniques is the highlight of this paper.
A Comparative Analysis of Cogging Torque Reduction in BLDC Motor Using Bifurcation and Slot Opening Variation
doi:10.11648/j.epes.s.2015040501.12
American Journal of Electrical Power and Energy Systems
2015-09-10
© Science Publishing Group
G. Suresh Babu
T. Murali Krishna
B. Vikram Reddy
A Comparative Analysis of Cogging Torque Reduction in BLDC Motor Using Bifurcation and Slot Opening Variation
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12
12
2015-09-10
2015-09-10
10.11648/j.epes.s.2015040501.12
http://www.sciencepublishinggroup.com/journal/paperinfo.aspx?journalid=165&doi=10.11648/j.epes.s.2015040501.12
© Science Publishing Group