Water leakage detection system for power transmission converter valve and monitoring and fault replacement method

The invention discloses a water leakage detection system for a power transmission converter valve and a monitoring and fault replacement method. The system comprises a water leakage detector, a coupler, a connecting line and a water leakage detection board card, wherein the water leakage detector comprises at least one alarm channel, the number of the water leakage detection board cards is two, the two water leakage detection board cards belong to two independent systems, and the two water leakage detection board cards and the water leakage detector are connected through a coupler and a connecting line. Under the condition that normal operation of the converter valve is not affected, system faults are switched, and the online replacement function is achieved. 本发明公开了一种输电换流阀用漏水检测系统及监测和故障更换方法，包括漏水检测器、耦合器、连接线和漏水检测板卡；漏水检测器包括至少一个报警通道，漏水检测板卡数量为两个，两个漏水检测板卡分属于两个独立的系统，两个漏水检测板卡和漏水检测器通过耦合器和连接线进行连接。在不影响换流阀正常运行下，对系统故障进行切换，实现在线更换功能。