换流变压器分接开关压力释放阀误动作原因分析

针对一起换流变压器分接开关压力释放阀动作的事件,结合事件报文和现场检查情况,通过对压力释放阀的结构原理、分接开关的切换时序、事件报文进行综合分析,判断出压力释放阀误动作的主要原因是其存在缺陷和性能出现劣化,提出了运维、检修建议,为换流站(变电站)的运检管理和事故分析提供参考。

Misoperation causes analysis on pressure relief valve for tapping switch of converter transformer

For converter transformer tap-changer with pressure relief valve action events, combined with event message and field inspection situation, based on the comprehensive analysis of the structure principle of the pressure relief valve, tap switching sequence and event message, the misoperation causes of the pressure release valve was judged.The suggestions were put forward for the operations and maintenance, which can provide the reference for the inspection management and accident analysis of the converter substation.