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《Relay》 2006-03
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The special problems of 750 kV transmission line and its influences on relay protection

LI Rui-sheng~1,SUONAN Jia-le~2 (1.XJ Electric Protection and Automation Business Department,Xuchang 461000,China;2.Xi'an Jiaotong University,Xi'an 710049,China)  
Based on 750 kV power system parameters provided by Northwest China Electric Power Corporation and dynamic simulation project offered by Electric Power Research Institute,several special problems of 750 kV transmission line are presented through RTDS that should be paid attention.In addition,its influences to protective relaying are analyzed in this paper,such as capacitance current,transient process,transition resistance,connecting unloaded line to system,heavy load,and great fault current.It is expected that it can be helpful for studying or developing UHV transmission line protection device.
【CateGory Index】: TM773
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