刘永兴
LIU Yong-xing(Jiaxing Electric Power Bureau

• 1:嘉兴电力局

摘要(Abstract)：

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.

关键词(KeyWords)： 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

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 刘永兴
LIU Yong-xing(Jiaxing Electric Power Bureau

DOI: 10.19585/j.zjdl.2010.09.007

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