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

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Spacer cable and ABC distribution lines. Long-term analysis 间隔电缆和ABC配电线路。长期的分析
Proceedings of 1996 Transmission and Distribution Conference and Exposition Pub Date : 1996-09-15 DOI: 10.1109/TDC.1996.545938
M. R. Soares, F. R. Britto, F. Nishimura, L.D. Cicareili
{"title":"Spacer cable and ABC distribution lines. Long-term analysis","authors":"M. R. Soares, F. R. Britto, F. Nishimura, L.D. Cicareili","doi":"10.1109/TDC.1996.545938","DOIUrl":"https://doi.org/10.1109/TDC.1996.545938","url":null,"abstract":"CEMIG-Companhia Energetica de Minas Gerais-is one of the largest electric-power installations in Latin America, situated in the state of Minas Gerais, southeast Brazil. It has some 5000 MW of generation capacity and distributes electric power among 4 million customers through 20000 km of transmission lines and more than 250000 km of distribution lines. To improve both the electric power supply quality and personnel safety, CEMIG has pioneered the use of aerial cable systems, such as the spacer cable and aerial bundled cable (ABC), in its Brazilian distribution system. As from 1991, it has been jointly working with a Brazilian cable manufacturer and an American spacer cable manufacturer to develop material technologies and construction patterns. This paper presents a comparative economic analysis of aerial cable systems and those in the conventional pattern: concrete poles, 2.4 m long wooden crossarms and bare conductors. The analysis takes into consideration the initial investment and operational costs of lines along with their lifetime period. The paper concludes with a recommendation of intensive utilization of spacer cable for medium-voltage lines and pre-assembled cables in low-voltage circuits. Only special applications should require the ABC lines.","PeriodicalId":105076,"journal":{"name":"Proceedings of 1996 Transmission and Distribution Conference and Exposition","volume":"36 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":"126828906","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: 12
A comparison of the heat dissipation performance of twin wall HDPE and earthenware cable ducts 双壁HDPE与陶瓷电缆管道的散热性能比较
Proceedings of 1996 Transmission and Distribution Conference and Exposition Pub Date : 1996-09-15 DOI: 10.1109/TDC.1996.547566
A. Harbidge, I. Jefferson, C. Rogers, M. Coates
{"title":"A comparison of the heat dissipation performance of twin wall HDPE and earthenware cable ducts","authors":"A. Harbidge, I. Jefferson, C. Rogers, M. Coates","doi":"10.1109/TDC.1996.547566","DOIUrl":"https://doi.org/10.1109/TDC.1996.547566","url":null,"abstract":"This paper presents the results of an extensive experimental programme conducted to investigate the heat dissipation characteristics of twin wall HDPE (high density polyethylene) cable duct. The results are compared with those for more traditional material ducts. The perceptions of some UK cable engineers are that cables installed in twin wall HDPE ducts should be de-rated by an extra 10% because of the insulating effect of the void between the twin walls. Within the paper there is a brief description of the experimental methodology used to simulate steady state conditions for cables installed in ducts. The analysis of the results reveals that there are only small differences in the heat dissipation characteristics between twin wall HDPE and clayware duct cable ratings are thus affected by only a minimal amount. The results also offer cable engineers more information on the prediction of temperatures in and around cables installed in ducts. It is hoped that the information presented will reduce the number of over-sized cables in operation, and hence reduce initial costs.","PeriodicalId":105076,"journal":{"name":"Proceedings of 1996 Transmission and Distribution Conference and Exposition","volume":"55 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":"126862413","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
Reliability centered maintenance for transmission systems 以可靠性为中心的传输系统维护
Proceedings of 1996 Transmission and Distribution Conference and Exposition Pub Date : 1996-09-15 DOI: 10.1109/TDC.1996.545920
M. E. Beehler
{"title":"Reliability centered maintenance for transmission systems","authors":"M. E. Beehler","doi":"10.1109/TDC.1996.545920","DOIUrl":"https://doi.org/10.1109/TDC.1996.545920","url":null,"abstract":"The regulatory and market forces that are challenging the electric utility industry require more proactive methods of utility asset management. An important component of asset management for electric utilities is the maintenance of existing transmission lines. Therefore, some utilities are working to implement a condition-based, predictive transmission line maintenance program using the concepts of reliability centered maintenance. These concepts are discussed.","PeriodicalId":105076,"journal":{"name":"Proceedings of 1996 Transmission and Distribution Conference and Exposition","volume":"18 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":"115346464","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: 65
Evaluation of grounding methods used for maintenance of transmission lines 输电线路维修用接地方法的评价
Proceedings of 1996 Transmission and Distribution Conference and Exposition Pub Date : 1996-09-15 DOI: 10.1109/TDC.1996.545962
L. Dvorak, L. Romero
{"title":"Evaluation of grounding methods used for maintenance of transmission lines","authors":"L. Dvorak, L. Romero","doi":"10.1109/TDC.1996.545962","DOIUrl":"https://doi.org/10.1109/TDC.1996.545962","url":null,"abstract":"The paper evaluates four basic grounding methods used for maintenance of transmission lines. These methods are: three-phase bracket grounding; combination grounding; single-phase worksite grounding; and three-phase worksite grounding. The results are summarized and evaluated to assess the effectiveness of the grounding methods and to determine the countermeasures needed to mitigate the electrical shock hazards that may exist during ground faults at the work site. The voltage and current measurements were performed with specially designed sensors to correctly record the data.","PeriodicalId":105076,"journal":{"name":"Proceedings of 1996 Transmission and Distribution Conference and Exposition","volume":"18 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":"126671798","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
A new approach for arcing faults detection and fault distance calculation in spectral domain 一种谱域电弧故障检测与故障距离计算的新方法
Proceedings of 1996 Transmission and Distribution Conference and Exposition Pub Date : 1996-09-15 DOI: 10.1109/TDC.1996.547574
V. Terzija, Z. Radojevic, M. Djurić
{"title":"A new approach for arcing faults detection and fault distance calculation in spectral domain","authors":"V. Terzija, Z. Radojevic, M. Djurić","doi":"10.1109/TDC.1996.547574","DOIUrl":"https://doi.org/10.1109/TDC.1996.547574","url":null,"abstract":"In order to avoid autoreclosure onto permanent faults, a new numerical algorithm for arcing faults detection and fault distance calculation is presented. It provides the results independently from other protective devices, which is an important improvement to the existing methods. The new approach, the mathematical model established in the spectral domain and the solution for the earthless faults are given. For the purpose of unknown fault distance and arc voltage amplitude estimation, the least error squares method is used. The new algorithm is tested through numerous computer simulations and in the laboratory environment.","PeriodicalId":105076,"journal":{"name":"Proceedings of 1996 Transmission and Distribution Conference and Exposition","volume":"17 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":"114827414","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
Operating experience of Hokkaido-Honshu high voltage direct current link 北海道-本州高压直流线路运行经验
Proceedings of 1996 Transmission and Distribution Conference and Exposition Pub Date : 1996-09-15 DOI: 10.1109/TDC.1996.545929
M. Sampei, H. Magoroka, M. Hatano
{"title":"Operating experience of Hokkaido-Honshu high voltage direct current link","authors":"M. Sampei, H. Magoroka, M. Hatano","doi":"10.1109/TDC.1996.545929","DOIUrl":"https://doi.org/10.1109/TDC.1996.545929","url":null,"abstract":"The Hokkaido-Honshu HVDC link was increased to 600 MW in 1993. In the DC link, new devices and equipment, such as light-triggered thyristors, dead-tank type DC filters and so on, are employed. This DC link features a unique control system, automatic frequency control (AFC), applying modern control theory. This paper describes the new techniques and operating experiences. The Tohoku Region, where one terminal is located, was hit by a large earthquake in 1994. The effects and damage to the equipment is described in this paper.","PeriodicalId":105076,"journal":{"name":"Proceedings of 1996 Transmission and Distribution Conference and Exposition","volume":"119 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":"132996448","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: 7
Design, installation, and field experience with a real-time portable transformer monitoring system 具有便携式实时变压器监测系统的设计、安装和现场经验
Proceedings of 1996 Transmission and Distribution Conference and Exposition Pub Date : 1996-09-15 DOI: 10.1109/TDC.1996.545913
F. Hoppe, R. Thompson
{"title":"Design, installation, and field experience with a real-time portable transformer monitoring system","authors":"F. Hoppe, R. Thompson","doi":"10.1109/TDC.1996.545913","DOIUrl":"https://doi.org/10.1109/TDC.1996.545913","url":null,"abstract":"A portable transformer monitoring system has been developed and installed to monitor and store critical operating parameters of power transformers. The system's hardware, firmware, and software have been designed using an \"open\" architecture to provide maximum flexibility for parameter measurement and data presentation. A two-bank system can be placed in service in under three hours without requiring equipment outages and is readily expandable to include thermal modeling, alarm functions, pump and fan control, diagnostics and real-time ratings. The system can be interfaced to existing SCADA or EMS.","PeriodicalId":105076,"journal":{"name":"Proceedings of 1996 Transmission and Distribution Conference and Exposition","volume":"44 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":"133386560","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
Numerical investigation of the effect of valve reactor design on thyristor stress in a HVDC thyristor valve 高压直流晶闸管阀芯电抗器设计对晶闸管应力影响的数值研究
Proceedings of 1996 Transmission and Distribution Conference and Exposition Pub Date : 1996-09-15 DOI: 10.1109/TDC.1996.545954
M. Tadokoro, T. Yamamoto, Y. Shoji, K. Yamaji, H. Irokawa
{"title":"Numerical investigation of the effect of valve reactor design on thyristor stress in a HVDC thyristor valve","authors":"M. Tadokoro, T. Yamamoto, Y. Shoji, K. Yamaji, H. Irokawa","doi":"10.1109/TDC.1996.545954","DOIUrl":"https://doi.org/10.1109/TDC.1996.545954","url":null,"abstract":"The overvoltage on the thyristor elements is of particular interest for practical design. Dependence of the behavior of the overvoltage on characteristics of the anode reactor was investigated mostly by numerical simulation by transient voltage program. The point in the valve, to which the core of the anode reactor is connected, critically changes the voltage that appears on the thyristor elements. The stray capacitance of the winding to the core is another important characteristic value. A structure supported thyristor valve for DC transmission of /spl plusmn/500 kV, 2800 MW was developed with the aid of the understanding about this voltage behavior.","PeriodicalId":105076,"journal":{"name":"Proceedings of 1996 Transmission and Distribution Conference and Exposition","volume":"27 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":"133396451","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: 7
A study of equipment sizes and constraints for a unified power flow controller 统一潮流控制器的设备尺寸及约束研究
Proceedings of 1996 Transmission and Distribution Conference and Exposition Pub Date : 1996-09-15 DOI: 10.1109/TDC.1996.545956
J. Bian, D. Ramey, R. J. Nelson, A. Edris
{"title":"A study of equipment sizes and constraints for a unified power flow controller","authors":"J. Bian, D. Ramey, R. J. Nelson, A. Edris","doi":"10.1109/TDC.1996.545956","DOIUrl":"https://doi.org/10.1109/TDC.1996.545956","url":null,"abstract":"This paper provides a quantitative measurement of the benefit that a unified power flow controller (UPFC) can provide to increase firm power transfer between two large power systems. Included is a complete model for a UPFC control system that contains bus voltage control by the shunt inverter, real power transfer between the shunt and series inverters, and real and reactive power control for the transmission line into which the series inverter is inserted. A significant part of the model is representation of dynamic limits that coordinate injected current limits for the shunt inverter, power transfer limits between inverters, voltage injection limits for the series inverter, current limits for the series inverter, and line voltage limits for the transmission line. This paper contains a simple system simulation to demonstrate the coordinated dynamic control and illustrate issues that system planning engineers must consider in defining applications for a UPFC.","PeriodicalId":105076,"journal":{"name":"Proceedings of 1996 Transmission and Distribution Conference and Exposition","volume":"21 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":"115063243","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: 110
Loadability of generation/transmission systems with unified steady-state and dynamic security constraints 统一稳态和动态安全约束下的发输电系统可负荷性
Proceedings of 1996 Transmission and Distribution Conference and Exposition Pub Date : 1996-09-15 DOI: 10.1109/TDC.1996.547568
D. Gan, Z. Qu, H. Cai, X. Wang
{"title":"Loadability of generation/transmission systems with unified steady-state and dynamic security constraints","authors":"D. Gan, Z. Qu, H. Cai, X. Wang","doi":"10.1109/TDC.1996.547568","DOIUrl":"https://doi.org/10.1109/TDC.1996.547568","url":null,"abstract":"Estimation of loadability of a generation/transmission system is of practical importance in power system operation and planning. This paper presents a formulation to address the problem using the terminology of mathematical programming theory. Both steady-state and dynamic security are taken into account in the proposed formulation. An iterative solution procedure, which is computationally effective, is developed to solve the formulation numerically. The procedure generates a slightly conservative estimate on the loadability of a generation/transmission system. Simulation results of a test power system are provided.","PeriodicalId":105076,"journal":{"name":"Proceedings of 1996 Transmission and Distribution Conference and Exposition","volume":"18 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":"130037711","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: 6
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