57th Annual Conference for Protective Relay Engineers, 2004最新文献

Primary high-current testing of relays with low ratio current transformers 采用低比电流互感器的继电器的一次大电流试验

57th Annual Conference for Protective Relay Engineers, 2004 Pub Date : 2004-10-08 DOI: 10.1109/PAPCON.2004.1338380

S. Zocholl, J. Mooney

{"title":"Primary high-current testing of relays with low ratio current transformers","authors":"S. Zocholl, J. Mooney","doi":"10.1109/PAPCON.2004.1338380","DOIUrl":"https://doi.org/10.1109/PAPCON.2004.1338380","url":null,"abstract":"This paper serves as one of few references describing primary high-current testing of protective relays using low ratio current transformers. Accurate measurement of high-current magnitudes requires high ratio current transformers. However, it is the practice to apply low ratio CTs based on small motor loads. The protection engineer then relies on the motor relay to trip for the enormous current of a phase-to-phase fault in the motor cable. The assumption is that fault current exceeding 300 times the CT rating can produce a secondary current large enough for a fast instantaneous trip. This leap of faith is based on the lack of knowledge of the highly distorted secondary waveform and how it is processed in the relay. The tests show the limitations of Fourier and cosine filters used in microprocessor relays that extract the fundamental phasors and eliminate harmonics. The tests validate the operation of a cosine-peak adaptive filter designed to cope with the highly distorted saturated waveforms produced by the low ratio CTs subjected to high current. This paper also reports on the results of primary high-current tests of overcurrent, motor, and distance relays using low ratio CTs. Lastly, this paper compares the internal unfiltered event records with MATLAB/spl reg/ simulations of the same cases.","PeriodicalId":305674,"journal":{"name":"57th Annual Conference for Protective Relay Engineers, 2004","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115596380","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: 8

Synchronized phasor measurement in protective relays for protection, control, and analysis of electric power systems 电力系统保护、控制和分析用保护继电器中的同步相量测量

57th Annual Conference for Protective Relay Engineers, 2004 Pub Date : 2004-04-01 DOI: 10.1049/CP:20040246

G. Benmouyal, E. Schweitzer, Armando Guzman

引用次数: 130

Green power - wind generated protection and control considerations 绿色电力——风力发电保护与控制的考虑

57th Annual Conference for Protective Relay Engineers, 2004 Pub Date : 2004-04-01 DOI: 10.1109/CPRE.2004.238417

D. Hornak, N. Chau

{"title":"Green power - wind generated protection and control considerations","authors":"D. Hornak, N. Chau","doi":"10.1109/CPRE.2004.238417","DOIUrl":"https://doi.org/10.1109/CPRE.2004.238417","url":null,"abstract":"Wind-generated energy systems have some unique challenges for protection and control engineers. The typical wind farm is not a new form of generation being interconnected to the bulk power system. The success of the evolving Green Power Interconnected Projects is very dependent on the following of a logical method used by electrical systems, leading to a long life for the assets and investments for the project. The protection and control aspects of the multifunction numerical devices enhance the ability to operate reliably and to maintain the project electrical systems for the life of the asset. Power system faults will happen, and analysis tools imbedded in the numerical systems assist the engineer to ensure that the protection operates as designed. This allows adjustments to be made, if necessary. This paper will address the following topics for a typical wind farm: wind turbine-generator protection and control; 34.5 kV distribution wind farm substation and feeders protection; wind farm transmission interconnection; monitoring, command and control of the wind turbines and the interconnection system; start up and commissioning of the wind farm and associated substations; unusual operating and maintenance experience.","PeriodicalId":305674,"journal":{"name":"57th Annual Conference for Protective Relay Engineers, 2004","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128106973","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: 28

Understanding and reducing arc flash hazards 了解和减少电弧闪光危害

57th Annual Conference for Protective Relay Engineers, 2004 Pub Date : 2004-04-01 DOI: 10.1109/CPRE.2004.238413

J. Weigel, J. Clough, B. Leuschner

引用次数: 5

Maximizing power system stability through wide area protection 通过广域保护最大化电力系统稳定性

57th Annual Conference for Protective Relay Engineers, 2004 Pub Date : 2004-04-01 DOI: 10.1109/CPRE.2004.238557

D. Karlsson, L. Broski, S. Ganesan

{"title":"Maximizing power system stability through wide area protection","authors":"D. Karlsson, L. Broski, S. Ganesan","doi":"10.1109/CPRE.2004.238557","DOIUrl":"https://doi.org/10.1109/CPRE.2004.238557","url":null,"abstract":"This paper describes basic principles and purpose for applying wide area protection schemes, also known as remedial action schemes (RAS) or system protection schemes (SPS). In the areas of power system automation and substation automation, there are two different trends: centralization and decentralization. More and more dynamic functions are moving from local and regional control centers towards central or national control centers. At the same time we also observe more \"intelligence\" and \"decision-power\" moving closer towards the actual power system substations. Greater functional integration is being enclosed in substation hardware. This raises discussions concerning reliability (security and dependability). The main targets for this paper are to: (1) sort out the terminology used in this area; (2) describe different application areas and related requirements; (3) illustrate different design principles - \"top-down\", \"bottom-up\", hierarchy, flat, etc., for different applications; (4) identify similarities and differences between classic equipment protection and system protection -concerning philosophy as well as concerning product and system design; and (5) show the value of wide area protection; (6) illustrate the great breakthrough for wide area protection, since the introduction of synchronized phasor measurements, based on PMUs (phasor measurement units).","PeriodicalId":305674,"journal":{"name":"57th Annual Conference for Protective Relay Engineers, 2004","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114392943","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: 24

Applying distance protection to cable circuits 对电缆电路进行距离保护

57th Annual Conference for Protective Relay Engineers, 2004 Pub Date : 2004-04-01 DOI: 10.1109/CPRE.2004.238353

B. Kasztenny, I. Voloh, J. Hubertus

引用次数: 14

Distribution incipient faults and abnormal events: case studies from recorded field data 分布初期故障和异常事件:来自现场记录数据的案例研究

57th Annual Conference for Protective Relay Engineers, 2004 Pub Date : 2004-04-01 DOI: 10.1109/CPRE.2004.238414

C. Benner, B. Russell

引用次数: 6

Verification of models in protection related analysis programs 保护相关分析程序中模型的验证

57th Annual Conference for Protective Relay Engineers, 2004 Pub Date : 2004-04-01 DOI: 10.1049/CP:20040109

A. Apostolov, J. Ingleson

引用次数: 1

Pilot protection communication channel requirements 导频保护通信通道要求

57th Annual Conference for Protective Relay Engineers, 2004 Pub Date : 2004-04-01 DOI: 10.1109/CPRE.2004.238555

S. Ward, T. Dahlin, B. Ince

{"title":"Pilot protection communication channel requirements","authors":"S. Ward, T. Dahlin, B. Ince","doi":"10.1109/CPRE.2004.238555","DOIUrl":"https://doi.org/10.1109/CPRE.2004.238555","url":null,"abstract":"Pilot relaying has been applied for transmission line protection since the 30's. The well known communication channels (pilot wire or power line carrier) are increasingly being replaced by digital channels. Dark fiber (dedicated fiber optic cable), multiplexed fiber optic systems (T1 and SONET) and 56 kbps phone lines (DDS - digital data service) are now made available for pilot protection purposes. The new channels provide much higher data transfer rate but reliability and security performance criteria developed for the telecommunications industry are not easily translated to teleprotection applications. A number of new terms are introduced to the protection engineer and it might not be all that obvious what precautions need to be taken from a protective relaying point of view. This paper discusses the requirements for the communication channel for common pilot schemes, direct transfer trip and current differential relaying. It addresses issues such as channel asymmetry and channel switching in T1 and SONET networks and the affect on pilot relaying performance. It also provides basic description of digital communication techniques and terminology that the relay engineer may encounter in his work.","PeriodicalId":305674,"journal":{"name":"57th Annual Conference for Protective Relay Engineers, 2004","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126647968","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: 22

Distribution automation to improve circuit reliability 配电自动化，提高电路可靠性

57th Annual Conference for Protective Relay Engineers, 2004 Pub Date : 2004-04-01 DOI: 10.1109/CPRE.2004.238415

K. Clark

引用次数: 3