摘要
某110kV变电站中一条35kV线路发生永久性故障,保护装置在第一次正确动作并重合后,未再次正确动作,造成主变保护越级跳闸,并最终导致35kV母线失压。文中深入探讨了保护拒动的原因,阐述了事故检查处理过程,对保护装置在运行过程中暴露出的弱点进行了系统的分析,并对此提出具体解决方案。
A permanent fault of 35kV power line in a certain 110kV power station is occurred,the relay protection device didn't act correctly anymore after its first accurate act and reclose,caused the override trip of transformer protection,finally caused the 35kV bus voltage failure.This paper studies the reason of protection device miss trip,describes the process of fault treatment,analyses the weakness of the relay protection device in operation,then puts forward solution for solving the weakness.
出处
《华中电力》
2012年第2期15-16,19,共3页
Central China Electric Power
关键词
CT
饱和
越级跳闸
故障分析
CT saturation
override trip
fault analysis
