新疆吉林台二级水电站220kV GISⅠ段母线击穿烧毁原因分析及处理

Cause Analysis and Treatment of 220kV GIS Section Ⅰ Busbar Breakdown Burning in Xinjiang Jilintai Ⅱ Hydropower Station

2017年10月,新疆喀什吉林台二级水电站220kV母线差动保护动作,220kVⅠ段、Ⅱ段母线失压,两段母线上各间隔断路器动作跳闸,主变跳闸,两台机组甩负荷,然后机组全停。本文通过对现场检查情况进行分析,查找出了问题原因所在,并进行了针对性维修,此经验可供其他工程发生类似问题进行修复时参考。

Xinjiang Kashi Jilintai II hydropower station 220kV busbar differential protection action happened in October 2017.220kV section I and section II busbar suffered from decompression.All interval circuit breakers on two busbars were acted and tripped,main transformer was tripped,two units were load shedding,and then the unit was stopped completely.In the paper,site inspection condition is analyzed,the cause of failure is investigated,the unit is repaired in a targeted mode,and the experience can be used as repair reference for similar problems in other projects.