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Application and Analysis of Injection-type Stator Earth Fault Protection for Large Hydroelectric Unit

LING Hong-zheng1,HAN Hai-yan1,CHEN Jia-sheng2,ZHANG Qi-xue2(1.Longtan Hydropower Development Co.,Ltd,Tian'e 547300;2.NARI Relay Electric Co.,Ltd,Nanjing 211106)  
The scheme of injection-type stator earth fault protection for Longtan Hydropower Station is introduced.Some key techniques involved are elaborated,and some precautions in its application to engineering practice are provided.According to the single-phase stator earthing experiment on some large hydraulic generators in China,the SEF(Stator Earth Fault) protection using injected low frequency signals is proved to be useful and practical.
【CateGory Index】: TV734
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【Citations】
Chinese Journal Full-text Database 4 Hits
1 ZHANG Qixue,XI Kangqing,CHEN Jiasheng,WANG Xiang,SHEN Quanrong(Nanjing NARI-Relays Electric Co Ltd,Nanjing 211100,China);Field Application and Analysis of the Stator Earth Fault Protection with Voltage Injection for Large-sized Generator[J];Automation of Electric Power Systems;2007-11
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【Co-citations】
Chinese Journal Full-text Database 10 Hits
1 WANG Wei1,YE Yuan-bo2(1.Hefei Power Supply Company,Hefei 230022,China;2.Anhui Electrical Power Dispatch & Communication Center,Hefei 230022,China);The Analysis of the Relay Operation Due to the Opened Current Circuit[J];Journal of Anhui Electrical Engineering Professional Technique College;2008-03
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7 ZHANG Binghai1,WANG Xianzhi1,ZHANG Li1,LI Xiaowen2(1.Hebei Electric Power Research Institute,Shijiazhuang 050021,China;2.Zhanghewan Pumped Storage Co.Ltd.,Shijiazhuang 050041,China);Influence of Working Modes of Pumped Storage Unit on Generator-transformer Protection[J];Hydropower Automation and Dam Monitoring;2008-06
8 Feng Yangzhou (Lanzhou Electric Power Bureau);The Software Realization of Judgment in the Secondary Connec tion of Current Loop[J];Electrotechnical Application;2006-03
9 He Xun (Kunming University of Science and Technology);Analysis and Countermeasure of Sympathetic Inrush in Operating Transformers[J];Electrotechnical Application;2006-04
10 Sun Huihao (Power General Corporation of Shengli Oil Field);Research on Transformer Modeling and Simulation Based on EMTP/ATP[J];Electrotechnical Application;2008-06
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Chinese Journal Full-text Database 9 Hits
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