摘要
对一起发电机出口断路器失灵保护误动事故进行了论述和分析,提出了现有发电机断路器失灵保护中的电流判据会导致保护拒动的问题,分析了小电流接地系统单相接地及相间短路等故障时,断路器失灵保护电流判据无法起动的原因,对改进发电机断路器失灵保护判据提出了采用有流判据及增加电压等判据的建议。
This paper discussed and analyzed a mal-operation of generator circuit breaker failure protection, brought out the issues that existed in the current criteria which may lead to protection failure. By analyzing the single phase-to-ground fault and phase-to-phase fault in small current earthing system.To determine the reason that cause incapable pick up of overcurrent element, thus to put forward some suggests to improve the criteria for generator circuit breaker failure protection.
出处
《电气技术》
2012年第12期74-77,共4页
Electrical Engineering
关键词
断路器失灵
发电机断路器
误动
小电流接地
保护判据
breaker failure
generator circuit breaker
mal-operation
small current earthing
protectioncriteria
