Pub Date : 2009-04-06DOI: 10.1109/SUPERGEN.2009.5348229
Yue Yuan, Lei Wu, Weiwei Song, Zhihui Jiang
The microgrid can address the technical and commercial challenge of integrating distributed energy resources into the bulk electric grid, and also provide an effective approach to reducing the consequences of natural disaster (e.g. earthquake, hurricane and snowstorm). The microgrid features and its applications to emergency response and disaster relief are first presented in this paper. A control scheme that can maintain the coordinated operation of interconnected units in the microgrid to meet emergency response and disaster relief requirements is then proposed. To demonstrate the effectiveness of the proposed control scheme, simulation studies have been performed on a microgrid with multiple distributed energy resources. Simulation results clearly indicate that the proposed control scheme is effective to coordinate interconnected units and meet the emergency response and disaster relief requirements.
{"title":"Collaborative control of microgrid for emergency response and disaster relief","authors":"Yue Yuan, Lei Wu, Weiwei Song, Zhihui Jiang","doi":"10.1109/SUPERGEN.2009.5348229","DOIUrl":"https://doi.org/10.1109/SUPERGEN.2009.5348229","url":null,"abstract":"The microgrid can address the technical and commercial challenge of integrating distributed energy resources into the bulk electric grid, and also provide an effective approach to reducing the consequences of natural disaster (e.g. earthquake, hurricane and snowstorm). The microgrid features and its applications to emergency response and disaster relief are first presented in this paper. A control scheme that can maintain the coordinated operation of interconnected units in the microgrid to meet emergency response and disaster relief requirements is then proposed. To demonstrate the effectiveness of the proposed control scheme, simulation studies have been performed on a microgrid with multiple distributed energy resources. Simulation results clearly indicate that the proposed control scheme is effective to coordinate interconnected units and meet the emergency response and disaster relief requirements.","PeriodicalId":250585,"journal":{"name":"2009 International Conference on Sustainable Power Generation and Supply","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123307074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-04-06DOI: 10.1109/SUPERGEN.2009.5348168
Jiyong Li, Hong-hua Wang
The power available at the output of photovoltaic cells keeps changing with solar insolation and ambient temperature because photovoltaic cells exhibit a nonlinear current-voltage characteristic. So photovoltaic cells' maximum power point varies with solar insolation and ambient temperature. With the improved efficiencies of power electronics converters, it is now possible to operate photovoltaic power systems at its maximum power point (MPP) in order to improve the overall system efficiency. This paper presents a fuzzy control method for tracking maximum power point in photovoltaic power systems and the control system is established simultaneously. In this paper, simulation model of photovoltaic system's maximum power point tracking based on the fuzzy control method is developed in the MATLAB software. The results of simulation show that the fuzzy control algorithm significantly improves the efficiency during the tracking phase as compared to a conventional algorithm about maximum power point tracking (MPPT) in photovoltaic power systems. It is especially suitable for fast changing environmental conditions. Furthermore, the proposed algorithm is simple and can be easily implemented with any fast micro processor such as a digital signal processor.
{"title":"Maximum power point tracking of photovoltaic generation based on the fuzzy control method","authors":"Jiyong Li, Hong-hua Wang","doi":"10.1109/SUPERGEN.2009.5348168","DOIUrl":"https://doi.org/10.1109/SUPERGEN.2009.5348168","url":null,"abstract":"The power available at the output of photovoltaic cells keeps changing with solar insolation and ambient temperature because photovoltaic cells exhibit a nonlinear current-voltage characteristic. So photovoltaic cells' maximum power point varies with solar insolation and ambient temperature. With the improved efficiencies of power electronics converters, it is now possible to operate photovoltaic power systems at its maximum power point (MPP) in order to improve the overall system efficiency. This paper presents a fuzzy control method for tracking maximum power point in photovoltaic power systems and the control system is established simultaneously. In this paper, simulation model of photovoltaic system's maximum power point tracking based on the fuzzy control method is developed in the MATLAB software. The results of simulation show that the fuzzy control algorithm significantly improves the efficiency during the tracking phase as compared to a conventional algorithm about maximum power point tracking (MPPT) in photovoltaic power systems. It is especially suitable for fast changing environmental conditions. Furthermore, the proposed algorithm is simple and can be easily implemented with any fast micro processor such as a digital signal processor.","PeriodicalId":250585,"journal":{"name":"2009 International Conference on Sustainable Power Generation and Supply","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126656335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-04-06DOI: 10.1109/SUPERGEN.2009.5348311
Mei Yong, Wang Bolin
The leakage and picket effects of discrete fourier transform make it unable to measure the interharmonics of power systems. The windowed interpolating DFT can measure the interharmonics, while it needs the construction of window functions, which make the implementation and analysis complex. Simple transform in the frequency domain and multi-spectrum-line interpolation correction algorithm(MICA) instead of windowing functions and gives the corresponding interpolating algorithms. Matlab shows the algorithm has the character of simple implementation and high precision. Therefore, it presents a satisfy tool for measurement of interharmonics in power systems.
{"title":"Research of interharmonic measurement algorithm on power parameters","authors":"Mei Yong, Wang Bolin","doi":"10.1109/SUPERGEN.2009.5348311","DOIUrl":"https://doi.org/10.1109/SUPERGEN.2009.5348311","url":null,"abstract":"The leakage and picket effects of discrete fourier transform make it unable to measure the interharmonics of power systems. The windowed interpolating DFT can measure the interharmonics, while it needs the construction of window functions, which make the implementation and analysis complex. Simple transform in the frequency domain and multi-spectrum-line interpolation correction algorithm(MICA) instead of windowing functions and gives the corresponding interpolating algorithms. Matlab shows the algorithm has the character of simple implementation and high precision. Therefore, it presents a satisfy tool for measurement of interharmonics in power systems.","PeriodicalId":250585,"journal":{"name":"2009 International Conference on Sustainable Power Generation and Supply","volume":"292 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115214750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-04-06DOI: 10.1109/SUPERGEN.2009.5348030
Jianguo Yu, Yuzhang Wang, Li Xu, S. Weng
The study state of solid oxide fuel cell (SOFC) and hybrid power system in the developed country was investigated in this work. The comparison of various SOFCs and hybrid power systems in different countries is helpful for the development of SOFC. In addition, the effect of the cell structures on the performance of planar SOFC was studied. The performance of single cell with different shapes and different inlet gas channels was obtained by numerical simulation. These results show the voltage loss is enlarged with the increasing of size of the inlet gas channel.
{"title":"Development and investigation on the study state of solid oxide fuel cell and hybrid power system","authors":"Jianguo Yu, Yuzhang Wang, Li Xu, S. Weng","doi":"10.1109/SUPERGEN.2009.5348030","DOIUrl":"https://doi.org/10.1109/SUPERGEN.2009.5348030","url":null,"abstract":"The study state of solid oxide fuel cell (SOFC) and hybrid power system in the developed country was investigated in this work. The comparison of various SOFCs and hybrid power systems in different countries is helpful for the development of SOFC. In addition, the effect of the cell structures on the performance of planar SOFC was studied. The performance of single cell with different shapes and different inlet gas channels was obtained by numerical simulation. These results show the voltage loss is enlarged with the increasing of size of the inlet gas channel.","PeriodicalId":250585,"journal":{"name":"2009 International Conference on Sustainable Power Generation and Supply","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116094582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-04-06DOI: 10.1109/SUPERGEN.2009.5348027
A. P. McCabe, G. Aggidis
This paper describes an initial study into the optimisation of the shape of a wave energy collector using a genetic algorithm. The study investigates three descriptions of the surface geometry of a surging device, which are both compatible with panel-based hydrodynamic analysis software and form a suitable representation in the genetic algorithm. The analysis has been simplified by considering only the two-dimensional problem, that of optimising the cross-sectional shape of the surging body. Real-valued representation and continuous search space recombination and mutation are used in the genetic algorithm. A basic power absorption cost function is used to assess the relative performance of each candidate shape. The contribution of the results to the overall understanding of the optimization procedure and the direction of future research is discussed. In addition, the relative merits of the different geometric descriptions, and their value for further development are considered.
{"title":"A preliminary study into optimising the shape of a wave energy collector using a genetic algorithm","authors":"A. P. McCabe, G. Aggidis","doi":"10.1109/SUPERGEN.2009.5348027","DOIUrl":"https://doi.org/10.1109/SUPERGEN.2009.5348027","url":null,"abstract":"This paper describes an initial study into the optimisation of the shape of a wave energy collector using a genetic algorithm. The study investigates three descriptions of the surface geometry of a surging device, which are both compatible with panel-based hydrodynamic analysis software and form a suitable representation in the genetic algorithm. The analysis has been simplified by considering only the two-dimensional problem, that of optimising the cross-sectional shape of the surging body. Real-valued representation and continuous search space recombination and mutation are used in the genetic algorithm. A basic power absorption cost function is used to assess the relative performance of each candidate shape. The contribution of the results to the overall understanding of the optimization procedure and the direction of future research is discussed. In addition, the relative merits of the different geometric descriptions, and their value for further development are considered.","PeriodicalId":250585,"journal":{"name":"2009 International Conference on Sustainable Power Generation and Supply","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114480450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-04-06DOI: 10.1109/SUPERGEN.2009.5347993
Zhiqiang Wang, Guo-zhu Chen
Planar busbars have played a significant role in reducing the parasitic/stray inductance in modern high power converters, which is caused by physical current path loop from the IGBT to DC capacitors. Consequently, it may lead to such problems as non-ideal converter operation, over-voltages, voltage drop, current unbalance and resonance with DC capacitors as well as snubber capacitors, especially applied with active power filters (APF) usually with a wide range of current frequency. This paper presents a new physical structure for a voltage source inverter applied in 380V/400A APF with low inductance and oscillation busbar structure, in which the design considerations and analysis are given. The experimental and simulation results show that it obtained very low stray inductance and had good electromagnetic compatibility (EMC) performance.
{"title":"Study on planar busbar regarding stray inductance minimization and oscillation suppression for high power converter","authors":"Zhiqiang Wang, Guo-zhu Chen","doi":"10.1109/SUPERGEN.2009.5347993","DOIUrl":"https://doi.org/10.1109/SUPERGEN.2009.5347993","url":null,"abstract":"Planar busbars have played a significant role in reducing the parasitic/stray inductance in modern high power converters, which is caused by physical current path loop from the IGBT to DC capacitors. Consequently, it may lead to such problems as non-ideal converter operation, over-voltages, voltage drop, current unbalance and resonance with DC capacitors as well as snubber capacitors, especially applied with active power filters (APF) usually with a wide range of current frequency. This paper presents a new physical structure for a voltage source inverter applied in 380V/400A APF with low inductance and oscillation busbar structure, in which the design considerations and analysis are given. The experimental and simulation results show that it obtained very low stray inductance and had good electromagnetic compatibility (EMC) performance.","PeriodicalId":250585,"journal":{"name":"2009 International Conference on Sustainable Power Generation and Supply","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122162438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-04-06DOI: 10.1109/SUPERGEN.2009.5348214
Zhangang Yang, C. Yanbo, Chengshan Wang
To provide a test facility for possible demonstrations of advanced distributed generation system integration strategies, a single-phase laboratory-scale Microgrid system is set up. Two distributed generators are included in this Microgrid, a photovoltaic simulator and a wind turbine simulator. Both of them are connected to the AC grid via flexible power electronic interface respectively. For stable collaborative operation, a battery energy storage interfaced with a bi-directional inverter is necessary in this Microgrid. In the grid-connected mode, both the distributed generators converters and the bi-directional inverter are the grid-following unit. While switching from grid-connected mode to islanded mode, the bi-directional inverter is setting the voltage and frequency of the Microgrid through absorbing or releasing energy. The operation experimental results show that the laboratory-scale Microgrid system can operate in grid-connected or islanded mode, with a seamless transfer from one mode to the other, and hence increase the reliability of energy supplies.
{"title":"Construction, operation and control of a laboratory-scale microgrid","authors":"Zhangang Yang, C. Yanbo, Chengshan Wang","doi":"10.1109/SUPERGEN.2009.5348214","DOIUrl":"https://doi.org/10.1109/SUPERGEN.2009.5348214","url":null,"abstract":"To provide a test facility for possible demonstrations of advanced distributed generation system integration strategies, a single-phase laboratory-scale Microgrid system is set up. Two distributed generators are included in this Microgrid, a photovoltaic simulator and a wind turbine simulator. Both of them are connected to the AC grid via flexible power electronic interface respectively. For stable collaborative operation, a battery energy storage interfaced with a bi-directional inverter is necessary in this Microgrid. In the grid-connected mode, both the distributed generators converters and the bi-directional inverter are the grid-following unit. While switching from grid-connected mode to islanded mode, the bi-directional inverter is setting the voltage and frequency of the Microgrid through absorbing or releasing energy. The operation experimental results show that the laboratory-scale Microgrid system can operate in grid-connected or islanded mode, with a seamless transfer from one mode to the other, and hence increase the reliability of energy supplies.","PeriodicalId":250585,"journal":{"name":"2009 International Conference on Sustainable Power Generation and Supply","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122198503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-04-06DOI: 10.1109/SUPERGEN.2009.5348292
M. Peng, Y. Liu, C. Guo, Butian Huang, W. Zhao
This paper presents a novel diagnosis method combining element-oriented Petri nets with temporal order information. With the use of element-oriented Petri nets with time-stamp, the proposed method models the protection system philosophy of crucial elements in power system, such as transmission lines, buses and transformers. The advantages of the approach involve the following aspects: Firstly, the diagnosis model is easy to recognize the causality between data. Secondly, element-oriented Petri nets are employed to deal with a problem of combination explosion and a procedure of modeling is easier. Thirdly, the temporal order information could be utilized totally and properly so that the inaccurate information would be eliminated, and the accuracy of diagnosis would be improved and the processing on the same breakers with different results corresponding to different temporal order information would have satisfactory effectiveness. Moreover, case studies verified the validity of both the diagnosis model and method, as well as the potential of their application into fault diagnosis.
{"title":"A new fault diagnosis approach in power system based on element-oriented petri nets with time-stamp","authors":"M. Peng, Y. Liu, C. Guo, Butian Huang, W. Zhao","doi":"10.1109/SUPERGEN.2009.5348292","DOIUrl":"https://doi.org/10.1109/SUPERGEN.2009.5348292","url":null,"abstract":"This paper presents a novel diagnosis method combining element-oriented Petri nets with temporal order information. With the use of element-oriented Petri nets with time-stamp, the proposed method models the protection system philosophy of crucial elements in power system, such as transmission lines, buses and transformers. The advantages of the approach involve the following aspects: Firstly, the diagnosis model is easy to recognize the causality between data. Secondly, element-oriented Petri nets are employed to deal with a problem of combination explosion and a procedure of modeling is easier. Thirdly, the temporal order information could be utilized totally and properly so that the inaccurate information would be eliminated, and the accuracy of diagnosis would be improved and the processing on the same breakers with different results corresponding to different temporal order information would have satisfactory effectiveness. Moreover, case studies verified the validity of both the diagnosis model and method, as well as the potential of their application into fault diagnosis.","PeriodicalId":250585,"journal":{"name":"2009 International Conference on Sustainable Power Generation and Supply","volume":"210 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129411551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-04-06DOI: 10.1109/SUPERGEN.2009.5348062
H. M. Yang, L. Cui, J. Wen, S. Cheng, H. Wang
This paper proposes a damping method for inter-area oscillation based on energy storage system(ESS) installed to a transmission line. A new fuzzy logical controller (FLC) for ESS is proposed too. The input signal of the controller is the variation rate of the deviation between the phase angles of the intertie's terminal buses which is easy to measure in practical system and makes the controller more robust. Simulations results on single machine infinite bus system demonstrate the effectiveness of the suggested FLC strategy for ESS to damping inter-area oscillation.
{"title":"Inter-area oscillation damping control based on energy storage systems and fuzzy logical control","authors":"H. M. Yang, L. Cui, J. Wen, S. Cheng, H. Wang","doi":"10.1109/SUPERGEN.2009.5348062","DOIUrl":"https://doi.org/10.1109/SUPERGEN.2009.5348062","url":null,"abstract":"This paper proposes a damping method for inter-area oscillation based on energy storage system(ESS) installed to a transmission line. A new fuzzy logical controller (FLC) for ESS is proposed too. The input signal of the controller is the variation rate of the deviation between the phase angles of the intertie's terminal buses which is easy to measure in practical system and makes the controller more robust. Simulations results on single machine infinite bus system demonstrate the effectiveness of the suggested FLC strategy for ESS to damping inter-area oscillation.","PeriodicalId":250585,"journal":{"name":"2009 International Conference on Sustainable Power Generation and Supply","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129512760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-04-06DOI: 10.1109/SUPERGEN.2009.5348167
Jian-hua Zhang, Xingying Chen, B. Wang, Ping Wang, Hao-Ming Liu
The short-circuit current contribution of wind turbines has not received much attention so far. This paper establishes the doubly fed induction generator mathematical model and carried on corresponding short circuit analysis. Regarding the sudden short circuit process as a superimpose of steady state operation and transient state operation provoked by reverse voltage, stator three-phase short circuit current expression is obtained by carrying on the Laplace transformation and the inverse transformation to the state space equation. And the expression is confirmed by simulation. In addition, the character and attenuation rule of stator short circuit current component are analyzed, and maximum resistance of short circuit protective device is set.
{"title":"Three-phase short circuit analysis of DFIG-based wind generation and the crowbar biggest resistance setting","authors":"Jian-hua Zhang, Xingying Chen, B. Wang, Ping Wang, Hao-Ming Liu","doi":"10.1109/SUPERGEN.2009.5348167","DOIUrl":"https://doi.org/10.1109/SUPERGEN.2009.5348167","url":null,"abstract":"The short-circuit current contribution of wind turbines has not received much attention so far. This paper establishes the doubly fed induction generator mathematical model and carried on corresponding short circuit analysis. Regarding the sudden short circuit process as a superimpose of steady state operation and transient state operation provoked by reverse voltage, stator three-phase short circuit current expression is obtained by carrying on the Laplace transformation and the inverse transformation to the state space equation. And the expression is confirmed by simulation. In addition, the character and attenuation rule of stator short circuit current component are analyzed, and maximum resistance of short circuit protective device is set.","PeriodicalId":250585,"journal":{"name":"2009 International Conference on Sustainable Power Generation and Supply","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129705177","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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