摘要
凤滩水力发电厂1号发电机转子过压保护投运近10a,氧化锌阀片泄漏电流有增大的趋势,其中个别已超标,且灭磁开关为双断口直流断路器,有合闸不到位的现象发生。在厂部的"十五"技改中,对1号发电机转子过压保护进行了更换。
Over-voltage protection unit of number 1 generator rotor in Fengtan Hydroelectric Power Plant had been running for nearly ten years, It seems that the leakage current through ZnO varistor increased. Leakage current through several ZnO varistor exceed criterion and the switching-in of double-break DC circuit breaker is not suitable.By technical renovation during the tenth five-year in fengtan hydroelectric power plant , Over-voltage protection unit of number 1 generator rotor was replaced.
关键词
氧化锌
直流断路器
技术改造
ZnO
DC circuit breaker
technical renovation
