一起由非全相继电器异常动作引起的跳闸故障分析

Analysis of Some Trip Accident Caused by the Abnormal Action of Open-phase Relay

针对一起由非全相继电器异常动作引起的跳闸事故,结合非全相,自动重合闸及防跳功能分析了整个动作过程。从机构防跳和操作箱防跳的二次回路着手,分析了两类防跳的启动条件,结果表明采用机构防跳可使系统减少1次冲击,可以提高系统的暂态稳定性,降低断路器在短时间内动作次数,延长断路器寿命。

Combining the open-phase relay,automatic reclosing and anti-bouncer functions,this paper analyzes the whole process of the trip accident caused by the abnormal action of open-phase relay. Preceding from secondary circuit of mechanism anti-bouncer and operating box anti-bouncer,this article analyzes the starting conditions of two types of anti-bouncer. The result shows that taking mechanism anti-bouncer,the power system can be reduced by one shock and improved the transient stability of the system. In condition,it will be reducing the number of operation in a short time and prolonging the life of the circuit breaker.