一起110kV避雷器事故分析及引发对线路终端避雷器运行管理的思考

Discuss on the Operations Management of Line-terminal Arrester Based on a 110kV Arrester Accident Analysis

通过对1起110 kV线路终端无间隙复合外套金属氧化物避雷器爆炸事故同批次试品的解体检查试验,指出整体密封性能较差导致运行受潮,是加速了电阻片老化的主要原因;针对线路终端避雷器运行条件和运行管理的薄弱环节,提出运行管理和试验维护建议。

According to disassembly analysis and test on the gapless composite-coat metal oxide surge arresters among the same batch in an explosion accident of 110 kV line terminals, it is considered that poor sealing condition caused the operation wetting, and is the main reason for the accelerated aging of the resistors; some suggestions of operating management and testing maintenance are proposed for the operating conditions of the surge arrester at the line terminals and the weak links of the operating management.