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IEEE Power Engineering Society General Meeting, 2004.最新文献

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Rotor cage fault diagnosis in induction motors based on spectral analysis of current Hilbert modulus 基于电流希尔伯特模量谱分析的异步电动机转子保持架故障诊断
IEEE Power Engineering Society General Meeting, 2004. Pub Date : 2004-06-10 DOI: 10.1109/PES.2004.1373123
Zhenxing Liu, Xiaolong Zhang, Xianggen Yin, Zhe Zhang
{"title":"Rotor cage fault diagnosis in induction motors based on spectral analysis of current Hilbert modulus","authors":"Zhenxing Liu, Xiaolong Zhang, Xianggen Yin, Zhe Zhang","doi":"10.1109/PES.2004.1373123","DOIUrl":"https://doi.org/10.1109/PES.2004.1373123","url":null,"abstract":"Hilbert transformation is an ideal phase shifting tool in data signal processing. Being Hilbert transformed, the conjugated one of a signal is obtained. The Hilbert modulus is defined as the square of a signal and its conjugation. This work presents a method by which rotor faults of squirrel cage induction motors, such as broken rotor bars and eccentricity, can be diagnosed. The method is based on the spectral analysis of the stator current Hilbert Modulus of the induction motors. Theoretical analysis and experimental results demonstrate that has the same rotor fault detecting ability as the extended Park' vector approach. The vital advantage of the former is the smaller hardware and software spending compared with the existing ones.","PeriodicalId":236779,"journal":{"name":"IEEE Power Engineering Society General Meeting, 2004.","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115355563","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: 26
Executive overview: energy storage options for a sustainable energy future 执行概述:可持续能源未来的能源存储选择
IEEE Power Engineering Society General Meeting, 2004. Pub Date : 2004-06-10 DOI: 10.1109/PES.2004.1373298
Robert B. Schainker
{"title":"Executive overview: energy storage options for a sustainable energy future","authors":"Robert B. Schainker","doi":"10.1109/PES.2004.1373298","DOIUrl":"https://doi.org/10.1109/PES.2004.1373298","url":null,"abstract":"Sustainability of electric power systems will involve very large use of renewable energy sources for power production. Some of these sources, e.g. wind and solar, have a characteristic stochastic behaviour, which makes their output power production difficult to predict and have high power output fluctuations. Energy storage devices will be needed at different locations in the power system, to level the mismatch between renewable power generators and consumption and/or to store the surplus of power from renewable sources for later use during nongeneration time periods or low power generation time periods. This presentation will give an overview of different storage technologies and how they can be used in a sustainable power system.","PeriodicalId":236779,"journal":{"name":"IEEE Power Engineering Society General Meeting, 2004.","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114422348","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: 210
The Italian power system: recent evolution 意大利电力系统:最近的演变
IEEE Power Engineering Society General Meeting, 2004. Pub Date : 2004-06-10 DOI: 10.1109/PES.2004.1373052
L. Salvaderi
{"title":"The Italian power system: recent evolution","authors":"L. Salvaderi","doi":"10.1109/PES.2004.1373052","DOIUrl":"https://doi.org/10.1109/PES.2004.1373052","url":null,"abstract":"The Italian power system has gradually carried out its deregulation, ruled in Europe by the Directive 96/92/EC and in Italy by the new \"Electric Law\", the so-called Bersani Decree 79/99 of 31 /3/1999. This work presents the overview and recent developments in Italian power system. This work addresses several issues regarding blackouts, cheap power, emission trading, clean coal technology, renewable power sources, etc,.","PeriodicalId":236779,"journal":{"name":"IEEE Power Engineering Society General Meeting, 2004.","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116887243","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
Performance of "WAMS East" in providing dynamic information for the North East blackout of August 14, 2003 “WAMS East”为2003年8月14日东北地区停电提供动态信息的表现
IEEE Power Engineering Society General Meeting, 2004. Pub Date : 2004-06-10 DOI: 10.1109/PES.2004.1373161
J. Hauer, N. Bhatt, K. Shah, S. Kolluri
{"title":"Performance of \"WAMS East\" in providing dynamic information for the North East blackout of August 14, 2003","authors":"J. Hauer, N. Bhatt, K. Shah, S. Kolluri","doi":"10.1109/PES.2004.1373161","DOIUrl":"https://doi.org/10.1109/PES.2004.1373161","url":null,"abstract":"The blackout that impacted the U.S. and Canada on August 14, 2003, was notable for its extent, complexity, and impact. It triggered a massive review of operating records to determine what happened, why it happened, and how to avoid it in future operations. Much of this work was done at NERC level, through the U.S.-Canada power system outage task force. Additional background information concerning the event was gathered together by a group of utilities that, collectively, have been developing a wide area measurement system (WAMS) for the eastern interconnection. Like its counterpart in the western interconnection, \"WAMS East\" has a primary backbone of synchronized phasor measurements that are continuously recorded at central locations. Operational data have been critical for understanding and responding to the August 14 blackout. Records collected on WAMS East demonstrate the contributions that well synchronized data offer in such efforts, and the value of strategically located continuous recording systems to facilitate their integration. This work examines overall performance of the WAMS East backbone, with a brief assessment of the technology involved. Later papers will provide a utility view of the NERC data review and its institutional implications.","PeriodicalId":236779,"journal":{"name":"IEEE Power Engineering Society General Meeting, 2004.","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117195166","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: 77
Investigation of power loss and voltage stability limits for large wind farm connections to a subtransmission network 大型风电场与子输电网连接的功率损耗和电压稳定限值的研究
IEEE Power Engineering Society General Meeting, 2004. Pub Date : 2004-06-10 DOI: 10.1109/PES.2004.1373280
L. Ha, T. Saha
{"title":"Investigation of power loss and voltage stability limits for large wind farm connections to a subtransmission network","authors":"L. Ha, T. Saha","doi":"10.1109/PES.2004.1373280","DOIUrl":"https://doi.org/10.1109/PES.2004.1373280","url":null,"abstract":"Today wind farms are growing both in size and in number. Being connected at higher voltage levels, their impacts are becoming more widespread. High demand for reactive power is known as one major characteristic of large wind farms that causes voltage problems to power networks. The larger the wind farm, the more severe this effect could be. If the network is not able to meet the wind farm reactive power requirement, the integration of the wind farm power into the system would be limited. The reactive power shortage due to the operation of the wind farm may lead to an increase in the network overall losses and have adverse effects on its voltage stability. This study explores the possibility of integrating the full power of two large wind farms into a subtransmission network, as well as their impacts on the network losses and voltage stability. It also considers these impacts when the network loading is increased. The study is carried out using computer analyses performed on a custom-designed yet realistic radial power system.","PeriodicalId":236779,"journal":{"name":"IEEE Power Engineering Society General Meeting, 2004.","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117341437","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: 63
Large power system stability enhancement using wide-area signals based hierarchical controller 基于广域信号的分级控制器增强大电力系统稳定性
IEEE Power Engineering Society General Meeting, 2004. Pub Date : 2004-06-10 DOI: 10.1109/PES.2004.1373138
F. Okou, L. Dessaint, O. Akhrif
{"title":"Large power system stability enhancement using wide-area signals based hierarchical controller","authors":"F. Okou, L. Dessaint, O. Akhrif","doi":"10.1109/PES.2004.1373138","DOIUrl":"https://doi.org/10.1109/PES.2004.1373138","url":null,"abstract":"A two-level hierarchical structure is proposed to improve power systems stability under severe contingencies. The solution consists of a local controller for each generator at the first level helped by a multivariable central one at the secondary level. The secondary level controller uses remote signals from all the generators to synthesize two outputs, which decouple the subsystems dynamics hence maximizing the local controllers' performances. The first level controllers use local signals exclusively to dampen local oscillations. A systematic procedure for the design of the wide-area signals based controller is given and is based on a reformulation of the multimachine power system model into a suitable and closed form. The hierarchical structure is used on a realistic power system and simulation results show that the system stability is considerably improved. A power system, unstable under the classical controllers (AVR-PSS/GOVERNOR), is rendered stable when we combine the central and local controllers' actions.","PeriodicalId":236779,"journal":{"name":"IEEE Power Engineering Society General Meeting, 2004.","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116284871","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: 80
The energy challenge 能源挑战
IEEE Power Engineering Society General Meeting, 2004. Pub Date : 2004-06-10 DOI: 10.1109/PES.2004.1373095
M. Chen
{"title":"The energy challenge","authors":"M. Chen","doi":"10.1109/PES.2004.1373095","DOIUrl":"https://doi.org/10.1109/PES.2004.1373095","url":null,"abstract":"The electric utility industry is undergoing a time of uncertainty as the deregulation process develops. This phenomenon not only applies to the United States but to the entire world. After more than a decade, questionable restructuring results in countries such as the United Kingdom, New Zealand or Argentina (to name some of the pioneering cases), give a clear indication of the difficulties and risks involved in the process. Moreover some serious events have taken place in this country since the inception of the energy reform; notably the California crises in the Summer of 2000, which included the bankruptcy of major traditional utilities, followed by the Enron debacle a year later with its very unfavorable impact on the rest of the industry","PeriodicalId":236779,"journal":{"name":"IEEE Power Engineering Society General Meeting, 2004.","volume":"257 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116481629","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: 83
HTS fault current limiter concept 高温超导故障限流器概念
IEEE Power Engineering Society General Meeting, 2004. Pub Date : 2004-06-10 DOI: 10.1109/PES.2004.1373103
S. Kalsi, A. Malozemoff
{"title":"HTS fault current limiter concept","authors":"S. Kalsi, A. Malozemoff","doi":"10.1109/PES.2004.1373103","DOIUrl":"https://doi.org/10.1109/PES.2004.1373103","url":null,"abstract":"Fault current limiter (FCL) concepts based on non-inductive high temperature superconducting (HTS) coils were studied. The coils employed second generation (2G) HTS wire based on YBCO coated conductor currently under development at American superconductor corporation (AMSC) and other places. Two FCL concepts were studied: a) series and b) shunt. The series limiter employs a coil in series with the load and limits current by its increased resistance during the current limiting phase. This design is best for a single fault current limiting action, with resetting after the several minutes required cooling it down to its prefault temperature. The shunt limiter employs an inductor in parallel with the HTS coils. Once the HTS coil transitions to its normal state, fault current is limited by the impedance of the external inductor. An advantage of the shunt limiter is that with proper design, it could withstand multiple closely timed current limiting events. Since the 2G wire is becoming available in long lengths, now is the right time to initiate a commercial FCL product development program.","PeriodicalId":236779,"journal":{"name":"IEEE Power Engineering Society General Meeting, 2004.","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124094451","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: 77
A novel GA-based and meta-heuristics method for short-term unit commitment problem 一种基于遗传算法和元启发式的短期机组承诺问题求解方法
IEEE Power Engineering Society General Meeting, 2004. Pub Date : 2004-06-10 DOI: 10.1109/PES.2004.1373009
Gwo-Ching Liao, T. Tsao
{"title":"A novel GA-based and meta-heuristics method for short-term unit commitment problem","authors":"Gwo-Ching Liao, T. Tsao","doi":"10.1109/PES.2004.1373009","DOIUrl":"https://doi.org/10.1109/PES.2004.1373009","url":null,"abstract":"This paper presents a hybrid chaos search genetic algorithm / fuzzy system and simulated annealing method (CGAFS-SA) for solving short-term thermal generating unit commitment (UC) problems. The UC problem involves determining the start-up and shutdown schedules for generating units to meet the forecasted demand at the minimum cost. The commitment schedule must satisfy other constraints such as the generating limits per unit, reserve and individual units. We combined a genetic algorithm with the chaos search. First, it generates a set of feasible unit commitment schedules, and then puts the solution to the SA. The CGAFS has good global optimal search capabilities, but poor local optimal search capabilities. The SA method on the other hand, has good local optimal search capabilities. Through this combined approach an optimal solution can be found. Numerical simulations were carried out using four cases; ten, twenty, thirty and forty thermal units power systems over a 24-hour period. The result demonstrated the accuracy of the proposed CGAFS-SA approach.","PeriodicalId":236779,"journal":{"name":"IEEE Power Engineering Society General Meeting, 2004.","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129909343","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
Inverse Fourier transform for transient calculations 瞬态计算的傅里叶反变换
IEEE Power Engineering Society General Meeting, 2004. Pub Date : 2004-06-10 DOI: 10.1109/PES.2004.1373023
A. Morched
{"title":"Inverse Fourier transform for transient calculations","authors":"A. Morched","doi":"10.1109/PES.2004.1373023","DOIUrl":"https://doi.org/10.1109/PES.2004.1373023","url":null,"abstract":"A method is presented for the calculation of the energisation transients in overhead transmission lines. The method is capable of handling lumped and distributed parameters and of taking into account their frequency variation. The method is based on calculating the frequency spectrum of the transient under investigation, and then inverting to the time domain. The poles of the spectrum laying on the imaginary axis are isolated before inversion is carried out. The steady state part of the time response is calculated separately and added. Numerical inversion problems are studied and rules for carrying out this process are given. The method is tested for the case of single conductor lines and results are presented. The effect of varying the line length or ground resistivity on the energisation transient is discussed. In a separate paper the extension of the method to the case of a general N conductor transmission line is presented with the relevant results. The method presented provides an accurate but not a cumbersome means for calculating energisation transients.","PeriodicalId":236779,"journal":{"name":"IEEE Power Engineering Society General Meeting, 2004.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129930969","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
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