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Proceedings of 1996 Transmission and Distribution Conference and Exposition最新文献

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Methodology of urban re-development considerations in spatial load forecasting 空间负荷预测中考虑城市再开发的方法
Proceedings of 1996 Transmission and Distribution Conference and Exposition Pub Date : 1996-09-15 DOI: 10.1109/TDC.1996.547554
M. Chow, H. Tram
{"title":"Methodology of urban re-development considerations in spatial load forecasting","authors":"M. Chow, H. Tram","doi":"10.1109/TDC.1996.547554","DOIUrl":"https://doi.org/10.1109/TDC.1996.547554","url":null,"abstract":"Load forecasting in power systems is an important subject and has been studied from different points of view in order to achieve better load forecasting results. This paper addresses one of the challenges in spatial load forecasting area, urban re-development, and presents a theory and methodology to incorporate urban re-development into spatial load forecasting considerations.","PeriodicalId":105076,"journal":{"name":"Proceedings of 1996 Transmission and Distribution Conference and Exposition","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116785074","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: 31
A probabilistic approach to setting distance relays in transmission networks 传输网络中设置距离中继的概率方法
Proceedings of 1996 Transmission and Distribution Conference and Exposition Pub Date : 1996-09-15 DOI: 10.1109/TDC.1996.547556
J. Pinto de Sa, J. Afonso, R. Rodrigues
{"title":"A probabilistic approach to setting distance relays in transmission networks","authors":"J. Pinto de Sa, J. Afonso, R. Rodrigues","doi":"10.1109/TDC.1996.547556","DOIUrl":"https://doi.org/10.1109/TDC.1996.547556","url":null,"abstract":"The setting of back-up zones in distance relays has to deal with fault current infeeds between the relay and remote faults. Traditional approaches to this problem are conservative, sometimes leaving portions of a power system without sensitive or selective back-up protection. In this paper a probabilistic model for the relay errors resulting from the variation of the infeeds is developed. Other measurement inaccuracies are also considered in order to build a probabilistic approach to setting all zones of distance relays. The developed concepts are associated with automatic tools for computer aided protection coordination and applied to the Portuguese transmission grid.","PeriodicalId":105076,"journal":{"name":"Proceedings of 1996 Transmission and Distribution Conference and Exposition","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117313504","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: 27
Canadian National Power Quality Survey results 加拿大国家电力质量调查结果
Proceedings of 1996 Transmission and Distribution Conference and Exposition Pub Date : 1996-09-15 DOI: 10.1109/TDC.1996.545912
M. B. Hughes, J. Chan
{"title":"Canadian National Power Quality Survey results","authors":"M. B. Hughes, J. Chan","doi":"10.1109/TDC.1996.545912","DOIUrl":"https://doi.org/10.1109/TDC.1996.545912","url":null,"abstract":"In 1991 the Canadian Electrical Association (CEA) took a proactive approach to power quality problems and initiated a three year \"Canadian National Power Quality Survey\". This survey is now finished with a total of 550 customer sites having been monitored, each for a one month period. This paper presents a detailed discussion of how data from many different sites were combined into various \"average\" power quality profiles for different customer groups, such as industrial, commercial, and residential. The purpose of this paper is to report on the findings of the Canadian National Power Quality Survey and to share new information about the average electrical environment at utility customer premises.","PeriodicalId":105076,"journal":{"name":"Proceedings of 1996 Transmission and Distribution Conference and Exposition","volume":"626 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123120980","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: 30
Response of multiconductor power lines to nearby lightning return stroke electromagnetic fields 多导体电力线对附近雷电回击电磁场的响应
Proceedings of 1996 Transmission and Distribution Conference and Exposition Pub Date : 1996-09-15 DOI: 10.1109/TDC.1996.545950
F. Rachidi, C. Nucci, M. Ianoz, C. Mazzetti
{"title":"Response of multiconductor power lines to nearby lightning return stroke electromagnetic fields","authors":"F. Rachidi, C. Nucci, M. Ianoz, C. Mazzetti","doi":"10.1109/TDC.1996.545950","DOIUrl":"https://doi.org/10.1109/TDC.1996.545950","url":null,"abstract":"The calculation or voltages induced by indirect lightning on multiconductor lines has been the subject of several studies. The reported conclusions are not always in agreement with each other. In this paper, using a modeling procedure presented in a previous work, we study the shielding effect due to mutual coupling among the conductors of a three-phase line and between the ground wires and the line conductors. The results are compared with those published by other authors, and explanations of the disagreements are given. Additionally, a simplified method to evaluate lightning-induced voltages on a multiconductor line from the values obtained for the single conductor case is presented, and a simple formula which gives the magnitude reduction of the induced voltages due to the presence of other conductors is derived. It is shown that, for the examined case, the derived simple formula gives practically the same results as those obtained using the rigorous procedure. We have also compared results obtained using the simplified formula proposed by Rusck to evaluate the protective ratio of a ground wire with our results, and we have found that the values predicted by the Rusck formula are about 6% lower than ours.","PeriodicalId":105076,"journal":{"name":"Proceedings of 1996 Transmission and Distribution Conference and Exposition","volume":"359 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120878047","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: 88
The use of silicone gels for jointing power cables 使用硅胶连接电力电缆
Proceedings of 1996 Transmission and Distribution Conference and Exposition Pub Date : 1996-09-15 DOI: 10.1109/TDC.1996.547546
H. Yaworski, G. Craig, D. Roberts
{"title":"The use of silicone gels for jointing power cables","authors":"H. Yaworski, G. Craig, D. Roberts","doi":"10.1109/TDC.1996.547546","DOIUrl":"https://doi.org/10.1109/TDC.1996.547546","url":null,"abstract":"In the thirty years since the introduction of prefabricated cable accessories, advancements in materials science have produced the familiar push-on, heat shrink, and cold shrink splices. Further advancements in materials science technology have produced an insulation material that pushes the state of the art of prefabricated cable accessories to a new level. This paper discusses a new sealing and insulating material and its unique properties that lead to a simple, time saving, clamp-on accessory design for power cables up to 1 kV.","PeriodicalId":105076,"journal":{"name":"Proceedings of 1996 Transmission and Distribution Conference and Exposition","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126405770","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
DESIGN AND APPLICATION OF AERIAL SYSTEMS USING INSULATED AND COVERED WIRE AND CABLE 使用绝缘和覆盖电线电缆的航空系统的设计和应用
Proceedings of 1996 Transmission and Distribution Conference and Exposition Pub Date : 1996-09-15 DOI: 10.1109/TDC.1996.547593
A. Clapp, C. Landinger, W. Thue
{"title":"DESIGN AND APPLICATION OF AERIAL SYSTEMS USING INSULATED AND COVERED WIRE AND CABLE","authors":"A. Clapp, C. Landinger, W. Thue","doi":"10.1109/TDC.1996.547593","DOIUrl":"https://doi.org/10.1109/TDC.1996.547593","url":null,"abstract":"Insulated and covered wires and cables have been used in aerial power conductor applications for over fifty years. Despite this long history, the design, application and operation of these different types of conductor constructions are frequently misunderstood and confused with one another. Electric utilities have increasing needs for greater reliability and higher quality of service, growing concerns over electromagnetic fields, increased difficulty in obtaining right-of-way and tree trimming, and difficulty in maintaining clearances in congested areas. These challenges have resulted in expanded interest in using covered or insulated cables in aerial systems. This paper: (a) describes the differences between the constructions; (b) answers questions, concerns and misconceptions about these aerial designs; and (c) ranks the performance of each relative to desired attributes. A logical system for classifying covered wire and cable is also proposed.","PeriodicalId":105076,"journal":{"name":"Proceedings of 1996 Transmission and Distribution Conference and Exposition","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134120998","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
An alternative approach to evaluating electrical connectors for service-drop applications 另一种方法来评估电连接器的服务下降应用
Proceedings of 1996 Transmission and Distribution Conference and Exposition Pub Date : 1996-09-15 DOI: 10.1109/TDC.1996.545917
M. R. Soares, L. A. Costa, I.M.F. D'Angelo, J.W.M. Roosdorp, R.P. Leme
{"title":"An alternative approach to evaluating electrical connectors for service-drop applications","authors":"M. R. Soares, L. A. Costa, I.M.F. D'Angelo, J.W.M. Roosdorp, R.P. Leme","doi":"10.1109/TDC.1996.545917","DOIUrl":"https://doi.org/10.1109/TDC.1996.545917","url":null,"abstract":"This paper reports on the performance evaluation of a wedge-connector type for service-drop applications in electrical overhead lines. This connector uses a new design concept in which both components are mechanically compliant, including the wedge. The development and associated performance evaluations of the connector were carried out jointly by one of Brazil's largest power utility companies, located in the Minas Gerais state, and one of its connection systems suppliers. The paper focuses on the performance evaluation of the connector under severe test conditions using an alternative test program recommended by a Brazilian national committee for power distribution.","PeriodicalId":105076,"journal":{"name":"Proceedings of 1996 Transmission and Distribution Conference and Exposition","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132871603","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
Application of fuzzy logic technology for spatial load forecasting 模糊逻辑技术在空间负荷预测中的应用
Proceedings of 1996 Transmission and Distribution Conference and Exposition Pub Date : 1996-09-15 DOI: 10.1109/TDC.1996.547580
M. Chow, H. Tram
{"title":"Application of fuzzy logic technology for spatial load forecasting","authors":"M. Chow, H. Tram","doi":"10.1109/TDC.1996.547580","DOIUrl":"https://doi.org/10.1109/TDC.1996.547580","url":null,"abstract":"Utilities are required to provide reliable power to customers. In the design stages, utilities need to plan ahead for anticipated future load growth under different possible scenarios. Their decisions and designs can affect the gain or loss of millions of dollars for their companies as well as customer satisfaction and future economic growth in their territory. This paper proposes and describes the general methodology to use fuzzy logic to fuse the available information for spatial load forecasting. The proposed scheme can provide distribution planners other alternatives to aggregate their information for spatial load forecasting.","PeriodicalId":105076,"journal":{"name":"Proceedings of 1996 Transmission and Distribution Conference and Exposition","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132297335","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: 74
Load modeling for distribution circuit state estimation 配电电路状态估计的负荷建模
Proceedings of 1996 Transmission and Distribution Conference and Exposition Pub Date : 1996-09-15 DOI: 10.1109/TDC.1996.545907
A. Ghosh, D. Lubkeman, R.H. Jones
{"title":"Load modeling for distribution circuit state estimation","authors":"A. Ghosh, D. Lubkeman, R.H. Jones","doi":"10.1109/TDC.1996.545907","DOIUrl":"https://doi.org/10.1109/TDC.1996.545907","url":null,"abstract":"Due to the limited availability of telemetered data on distribution circuits, an integral part of any practical distribution circuit state estimator is a load modeling procedure that provides estimates of load demands at all circuit nodes. Traditional load modeling techniques used for distribution power flows are designed for system peak studies, and are not suitable for providing real-time statistical load estimates. This paper presents a real-time load modeling technique which incorporates the use of customer class curves and provides a measure of the uncertainty (statistics) in the estimates. It also incorporates the possibility of multiple line flow measurements and makes use of customer billing information. The load modeling technique is combined with a probabilistic distribution circuit state estimation algorithm. Results of the combined load modeling and state estimation algorithm are provided on an actual 934-bus distribution circuit illustrating its feasibility.","PeriodicalId":105076,"journal":{"name":"Proceedings of 1996 Transmission and Distribution Conference and Exposition","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117168608","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: 142
Specification, performance, testing and qualification of extra-heavy-duty connectors for high-voltage applications 高压应用的超重型连接器的规格、性能、测试和鉴定
Proceedings of 1996 Transmission and Distribution Conference and Exposition Pub Date : 1996-09-15 DOI: 10.1109/TDC.1996.545952
L. Lam, R. Morin
{"title":"Specification, performance, testing and qualification of extra-heavy-duty connectors for high-voltage applications","authors":"L. Lam, R. Morin","doi":"10.1109/TDC.1996.545952","DOIUrl":"https://doi.org/10.1109/TDC.1996.545952","url":null,"abstract":"The reliability of substation connectors is a constant concern for electrical utilities and represents one of the weak links of Hydro-Quebec's 735 kV power system. This paper describes some of the early findings of current-cycling tests on 4000 kcmil aluminum cable connectors and defines the need for more stringent qualification test specifications. Use of the ANSI C119.4 light-duty (125 cycles) test specification revealed a strong dependency on basic parameters such as surface roughness, dimension, type and surface finish of hardware, surface preparation, mounting techniques, etc. The first batch of test samples failed dramatically at an early stage in the current and load cycling tests. Some recommendations are formulated.","PeriodicalId":105076,"journal":{"name":"Proceedings of 1996 Transmission and Distribution Conference and Exposition","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117187520","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
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