摘要
1月20日贵州省安顺电厂#2机组热工保护动作跳闸,在跳闸的过程中相继发生了两台断路器拒动的罕见事故。通过对液压机构的解剖,分析了断路器拒动的原因;通过保护动作时的特征量,统一了保护分析的时间轴,从而解释了断路器拒动过程中各保护的动作行为。经过分析,各保护动作行为正确,为今后断路器液压机构的维护和分析类似的事故积累了经验,并提供了借鉴。
On 20, Jan, there were two circuit breakers miss tripped during the MFT＇s tripping process of No. 2 generator at Anshun Power Plant in Guizhou. This paper analyzes the cause of breakers misstrip through dissecting their hydraulic mechanism. The time of different protections is unified according to their electric feature, and the protections＇ operating process is explained. The result of all protections＇ tripping is right. It may assist to maintain hydraulic mechanism better, also it can accumulate experience and reference for analyzing similar accident for the future.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2008年第18期103-107,共5页
Power System Protection and Control
关键词
保护分析
断路器
拒动
protection analyzing
circuit breaker
miss trip
