摘要
首先介绍了一起220kV线路光纤差动保护拒动事件,针对保护拒动现象,结合保护装置报文和现场实际接线情况,分析保护拒动原因。最终得出由于电流回路的多点接地及接地点位置错误导致了本次拒动的结论。同时提出了接地问题对保护正常工作的重要影响。希望对其他单位同行分析处理同类问题有所帮助。
This paper first introduces the cause of 220 kV line WXH-803 differential protection failure to trip. Against protection failure to trip phenomenon and combined the report of protection devices and the actual wiring, it analyses the failure to trip cause of protection and reaches the final conclusion that the more grounded and access location error led to resist operaton. At the same time, the grounding problem on the the normal work of protection has important influence. It is hoped it is helpful to the other units of peer in dealing with similar problems.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2009年第12期135-136,共2页
Power System Protection and Control
关键词
继电保护
差动
接地
零序电流
protection
differential
grounded
zero-sequence current
