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《Journal of Anhui Electrical Engineering Professional Technique College》 2008-03
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The Analysis of the Relay Operation Due to the Opened Current Circuit

WANG Wei1,YE Yuan-bo2(1.Hefei Power Supply Company,Hefei 230022,China;2.Anhui Electrical Power Dispatch & Communication Center,Hefei 230022,China)  
Current differential relay is widely used in element protection.It is very important to ensure the current circuit in correct status for the current differential relay.From a accident that current open circuit results in the trip of the 500kV transformer,this paper carefully analyzes the reason of operation of the current differential relay and proposes technical ways to prevent such accident.
【CateGory Index】： TM77
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【Co-citations】
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2 ;The Study on the Logical Coor dination of the Line Protection Relay with the Circuit Breaker in 220 kV System[J];Anhui Electric Power;2008-03
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7 Gui Lin , Sun Yuguang , Wang Xiangheng , Wang Weijian , Li Li , Xie Zhuojian ( Tsinghua University, Beijing 100084, China) ( Mid South Design & Research Institute for Hydroelectric Projects, Changsha 410014, China) (3. Hunan Fengtan Generating Company Limited, Changsha 410007, China);PRACTICAL APPLICATION OF INTERNAL FAULT ANALYSIS SOFTWARE TO POWER GENERATORS[J];Dam Observation and Geotechnical Tests;2003-06
8 GUI Lin1,WANG Weijian1,XI Yu2,ZHANG Qungang2(1.Tsinghua University,Beijing 100084,China)(2.Northwest Investigation Design and Research Institute,Xi'an 710065,China);Comparison of the Main Protection Designs for Hydro-generators with Multi-branch Per Phase of Longyangxia and Laxiwa Hydropower Stations[J];Hydropower Automation and Dam Monitoring;2007-04
9 SHEN Bingke,WANG Weifu(Yellow River Engineering Consulting Co Ltd,Zhengzhou 450003,China);Design of Relay Protection for Generators and Transformers of Xixiayuan Hydropower Station[J];Hydropower Automation and Dam Monitoring;2007-05
10 WU Peizhi(East China Langyashan Pumped Storage Co.Ltd.,Chuzhou 239000,China);Shaft-current Prevention of Langyashan Pumped Storage Power Station[J];Hydropower Automation and Dam Monitoring;2008-05
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7 Sun Huihao~1,Liu Yulin~1,Wu Lei~1,Li Mengling~2 (1.Power General Corporation of Shengli Oil Field,Shandong Province Dongying City 257000 2.Gudao Oil Production Plant of Sengli Oil Field,Shandong Province Dongying City 257068);Research on Transformer Modeling and Simulation Based on EMTP/ATP[A];[C];2009
8 HU Tai LV Nian-ming LIU Bing-rong(Heshan Bureau of Guangdong Power Grid Corporation,Heshan 529700,Guangdong,China);Analysis and Precautions of Fault in 220kV Transformer When It Begins To Operate[A];[C];2006
9 Liu Hui(Chaohu Electric Power Company,Chaohu 238005,Anhui Province);The Reason And Countermeasure Of Gas Protection Action In Power Transformer[A];[C];2006
10 JIN Qichao LIU Minghui JI Yongping CUI Dezhi WANG Haibing Nanjing Talent Electric Co.,Ltd.,Nanjing 211800,China;The Problem of Estimating The Setting Value Error of Ratio Differential Protection[A];[C];2008
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