摘要
针对变电站多次发生220kV母联、主变断路器不明原因跳闸现象,通过试验分析发现,跳合闸保持继电器存在最小起动电流太小的问题,在变电站发生直流接地、交流电窜入直流系统等异常情况下易引起断路器误跳闸,分析了相应跳合闸保持继电器动作电流调整方法。
In view of frequent trip accidents of 220 kV bus coupling and main transformer circuit breaker for unknown causes in the substation after tests and analysis,it is found that the minimum starting current of trip/closing self-holding relay is insufficient so that it can easily cause a mistrip of breaker if abnormal circumstances occur in the substation such as DC grounding,AC intrusion into DC system etc.This paper analyzes the adjustment method of action current of trip/closing self-holding relay.
出处
《浙江电力》
2010年第9期23-25,共3页
Zhejiang Electric Power
关键词
断路器
继电器
自保持
起动电流整定
反措
circuit breaker
relay
self-holding
starting current setting
anti-accident measures
