特大容量发电机断路器隔离开关拒动分析及其对策

Analysis and Treatment on Disconnecting Rejection Failure of Extra-large Capacity Isolator in Generator Circuit Breaker

向家坝水电站发电机与主变之间安装有国产特大容量断路器,在发电机运行过程中,某台发电机断路器隔离开关出现了拒动故障,通过分析断路器隔离开关控制回路及操动机构原理,查找故障原因,最终提出了合理的解决对策。

A domestic extra-large capacity generator circuit breaker is installed between the generator and main transfbrmer in Xiangjiaba Hydropower Station. During generator operation, the isolator of a generator circuit breaker appears disconnecting rejection failure. The fault reasons are analyzed from the control circuit and operating mechanism principal of isolator, and the reasonable treatments are finally proposed.