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Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137)最新文献

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Application of fuzzy system theory in land use based long term distribution load forecasting 模糊系统理论在基于土地利用的长期配电网负荷预测中的应用
Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137) Pub Date : 1998-03-03 DOI: 10.1109/EMPD.1998.705544
S.K. Padmakumari, K. Mohandas, D. Thiruvengadam
{"title":"Application of fuzzy system theory in land use based long term distribution load forecasting","authors":"S.K. Padmakumari, K. Mohandas, D. Thiruvengadam","doi":"10.1109/EMPD.1998.705544","DOIUrl":"https://doi.org/10.1109/EMPD.1998.705544","url":null,"abstract":"Power distribution planning for maximum consumer satisfaction and system efficiency requires an accurate estimate of the load for the different areas in a geographical region. The land use based method of distribution load forecasting considers the causes of electric load growth due to addition of customers in a service area, growth of per capita usage and proposed developments in a given area, etc. This paper presents an application of fuzzy system theory for modelling long term distribution load forecasting. The land use based forecasting method has three major modules, a global model, a spatial model and a load model. For each small area, the spatial model has two scores: land use demand score and land use suitability score. These scores, set in the conventional land use method using rule of thumb, are replaced by a method based on fuzzy set theory.","PeriodicalId":434526,"journal":{"name":"Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127307024","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}
引用次数: 11
ASVG model for transient stability studies in unbalanced systems 不平衡系统暂态稳定性研究的ASVG模型
Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137) Pub Date : 1998-03-03 DOI: 10.1109/EMPD.1998.705499
Li Xiaolu, D. Xian-zhong, He Yang-zan, Yin Xianggen, Z. Hong, Li Jisheng, W. Feng, Ling Xu
{"title":"ASVG model for transient stability studies in unbalanced systems","authors":"Li Xiaolu, D. Xian-zhong, He Yang-zan, Yin Xianggen, Z. Hong, Li Jisheng, W. Feng, Ling Xu","doi":"10.1109/EMPD.1998.705499","DOIUrl":"https://doi.org/10.1109/EMPD.1998.705499","url":null,"abstract":"An advanced static VAr generator (ASVG) can be beneficial to power systems in many ways. In order to evaluate its dynamic performance, the device should be modeled appropriately in transient studies. This paper describes the dynamic behavior of ASVG in balanced systems and unbalanced systems. When bus voltage becomes unbalanced due to asymmetrical power systems failure or symmetrical operation, the negative sequence voltage component will cause negative sequence and 3-order harmonic voltage on the AC side of the ASVG. A model is presented for the transient stability studies in unbalanced systems.","PeriodicalId":434526,"journal":{"name":"Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137)","volume":"189 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122583000","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}
引用次数: 0
Voltage and power swing stabilization by decoupled control with AVR and phase shifter 采用AVR和移相器耦耦控制实现电压和功率摆幅稳定
Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137) Pub Date : 1998-03-03 DOI: 10.1109/EMPD.1998.705498
M. Hojo, Y. Mitani, K. Tsuji
{"title":"Voltage and power swing stabilization by decoupled control with AVR and phase shifter","authors":"M. Hojo, Y. Mitani, K. Tsuji","doi":"10.1109/EMPD.1998.705498","DOIUrl":"https://doi.org/10.1109/EMPD.1998.705498","url":null,"abstract":"With the development of power system controllers, it becomes feasible to control the output power of a synchronous generator directly and quickly by some FACTS controller like a solid-state phase shifter. The authors have proposed a scheme for power system stabilization by the direct generator power control which virtually linearizes swing equations. As the proposed control is capable of controlling the rotor swing to follow the prespecified linear response, it reveals some attractive characteristics; the controller is designed based on the linear system theory, the controller is robust even if some parameters are changed, and so on. The robustness guarantees the AVR to be designed independently of the stabilization for the rotor swing. In this paper, we propose a stabilizing control scheme for power swing as well as for voltage fluctuation by applying a decoupled control with a phase shifter and an AVR. The effectiveness of the proposed control has been supported with a series of simulation results from a view point of generator power and voltage stabilization.","PeriodicalId":434526,"journal":{"name":"Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122600308","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}
引用次数: 2
Theory and practice of semiconductor lightning eliminator 半导体消雷器的理论与实践
Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137) Pub Date : 1998-03-03 DOI: 10.1109/EMPD.1998.702741
Xie Guangrun, Chen Cixuan, Chen Yunping, Wen Xishan, Yu Jianhui
{"title":"Theory and practice of semiconductor lightning eliminator","authors":"Xie Guangrun, Chen Cixuan, Chen Yunping, Wen Xishan, Yu Jianhui","doi":"10.1109/EMPD.1998.702741","DOIUrl":"https://doi.org/10.1109/EMPD.1998.702741","url":null,"abstract":"The paper introduces the structure and function of the semiconductor lightning eliminator (SLE). It is pointed that the SLE can limit the main discharge current and reduce the rate of lightning current rise. Therefore SLE is very suitable for the lightning protection of microelectronic equipment and flammable and explosive facilities.","PeriodicalId":434526,"journal":{"name":"Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124962663","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}
引用次数: 5
Real-time pricing related short-term load forecasting 实时定价相关的短期负荷预测
Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137) Pub Date : 1998-03-03 DOI: 10.1109/EMPD.1998.702588
C. Chang, Minjun Yi
{"title":"Real-time pricing related short-term load forecasting","authors":"C. Chang, Minjun Yi","doi":"10.1109/EMPD.1998.702588","DOIUrl":"https://doi.org/10.1109/EMPD.1998.702588","url":null,"abstract":"The production cost of electricity is not constant over time. It is dependent on the instantaneous load being supplied, the available generation and the state of the network. Real-time pricing (RTP), which sets the electricity selling price approximately equal to marginal cost, is proposed as a potential method for ensuring overall economic rationality, and for limiting the demands required by all consumers at times of limited supply or emergency conditions. Any tariff change will influence customer's electricity consumption behavior. Some customers will respond to the real-time pricing by modifying or rescheduling electricity usage. This makes the short-term load forecasting problem more complicated than before. By combining the power of supervised and unsupervised neural networks, this paper presents a new solution for RTP related short-term load forecasting problem. The simulation result on realistic load and weather data confirms the good performance of this load forecaster.","PeriodicalId":434526,"journal":{"name":"Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137)","volume":"357 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123545880","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}
引用次数: 15
Exploring power system emergency control 探索电力系统应急控制
Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137) Pub Date : 1998-03-03 DOI: 10.1109/EMPD.1998.705446
W.R. Lachs, D. Sutanto
{"title":"Exploring power system emergency control","authors":"W.R. Lachs, D. Sutanto","doi":"10.1109/EMPD.1998.705446","DOIUrl":"https://doi.org/10.1109/EMPD.1998.705446","url":null,"abstract":"Maintaining the integrity of an interconnected grid is the paramount requirement if power system collapses are to be avoided. Current automatic measures for dealing with power system emergencies respond to the symptoms and not the causes and dismember the grid rather than keeping it whole. There are fundamental deficiencies in existing approaches, such as emergency control from the apex of a hierarchy, the inability to provide for multiple contingencies and improper understanding of the process of breakdown. A direction for emergency control is charted by addressing these hidden issues.","PeriodicalId":434526,"journal":{"name":"Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137)","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121105488","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}
引用次数: 1
Investigation of transformer inrush current using a dyadic wavelet 用二进小波分析变压器涌流
Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137) Pub Date : 1998-03-03 DOI: 10.1109/EMPD.1998.702607
Qi Li, David T. W. Chan
{"title":"Investigation of transformer inrush current using a dyadic wavelet","authors":"Qi Li, David T. W. Chan","doi":"10.1109/EMPD.1998.702607","DOIUrl":"https://doi.org/10.1109/EMPD.1998.702607","url":null,"abstract":"This paper presents the application of a dyadic wavelet to investigate transformer inrush current. Inrush currents are simulated using the Electromagnetic Transient Program (EMTP). Different values of remnant flux and point of voltage switch-on are chosen to produce various inrush current waveforms. The dyadic wavelet is applied to analyze the signature of the simulated inrush waveforms. Preliminary results are presented.","PeriodicalId":434526,"journal":{"name":"Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114935297","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}
引用次数: 13
Fuzzy dynamic programming for robust direct load control 鲁棒直接负荷控制的模糊动态规划
Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137) Pub Date : 1998-03-03 DOI: 10.1109/EMPD.1998.702747
K. Huang, H.T. Yang, C. Liao, C. Huang
{"title":"Fuzzy dynamic programming for robust direct load control","authors":"K. Huang, H.T. Yang, C. Liao, C. Huang","doi":"10.1109/EMPD.1998.702747","DOIUrl":"https://doi.org/10.1109/EMPD.1998.702747","url":null,"abstract":"This paper develops a fuzzy dynamic programming (FDP) approach to solving the direct load control (DLC) problem of power system air conditioner loads (ACLs). The interrupted capacities of the ACLs and the system load demands are all regarded as fuzzy variables. The scheduling of the DLC and the unit commitment (UC) is integrated into the FDP structure to reduce the system peak load as well as the total operating costs, The solution approach has been practically tested on the Taiwan power 38-unit system with 15 ACLs groups. In the tests, the Monte-Carlo simulation technique is employed to assess the robustness of the solution obtained from the proposed FDP approach for various load uncertainties. The results are given and compared to those without consideration of the load uncertainties.","PeriodicalId":434526,"journal":{"name":"Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129751447","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}
引用次数: 10
Dynamic analysis of voltage instability in the Vietnam system 越南电网电压不稳定的动态分析
Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137) Pub Date : 1998-03-03 DOI: 10.1109/EMPD.1998.705497
T. Tran-Quoc, T. Vu-Duc, R. Feuillet, N. Hadjsaid, J.C. Sabonnadibre, C. Praing, L. Tran-Dinh
{"title":"Dynamic analysis of voltage instability in the Vietnam system","authors":"T. Tran-Quoc, T. Vu-Duc, R. Feuillet, N. Hadjsaid, J.C. Sabonnadibre, C. Praing, L. Tran-Dinh","doi":"10.1109/EMPD.1998.705497","DOIUrl":"https://doi.org/10.1109/EMPD.1998.705497","url":null,"abstract":"In this paper, a dynamic analysis of voltage instability in the Vietnam 500/220 kV system is presented. Long-term simulation is used by taking into account dynamics of slow controllers. In order to predict voltage collapse, time domain simulation, calculation of indicator of voltage instability risk and eigenvalue methods are presented. Finally the paper presents several operating strategies in order to prevent the voltage stability in this system.","PeriodicalId":434526,"journal":{"name":"Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133297017","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}
引用次数: 3
A new method to incorporate FACTS devices in optimal power flow 一种将FACTS器件纳入最优潮流的新方法
Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137) Pub Date : 1998-03-03 DOI: 10.1109/EMPD.1998.705461
S. Ge, T. Chung, Y. K. Wong
{"title":"A new method to incorporate FACTS devices in optimal power flow","authors":"S. Ge, T. Chung, Y. K. Wong","doi":"10.1109/EMPD.1998.705461","DOIUrl":"https://doi.org/10.1109/EMPD.1998.705461","url":null,"abstract":"In this paper, a new method to incorporating FACTS devices in optimal power flow (OPF) problem is presented. This method can provide an enhanced economic solution with the use of controllable FACTS devices. Two types of FACTS devices, thyristor controlled series compensators (TCSC) and thyristor controlled phase shifters (TCPS), are considered in this method. The specified power flow control constraints due to the use of FACTS devices are included in the OPF problem. The proposed method decomposes the solution of such modified OPF problem into two subproblems' iteration. The first subproblem is a power flow control problem and the second subproblem is a conventional OPF problem. The two subproblems are solved iteratively until convergence. Case studies are presented to show the effectiveness of the proposed method.","PeriodicalId":434526,"journal":{"name":"Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114708894","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}
引用次数: 13
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