±800kV换流站极1低端换流器旁路刀闸故障分析

Analysis on the Failures of Low Voltage Converter Bypass Switch in ±800 kV Converter Station

在±800kV祁连站极1低端换流器不带线路开路试验,进行极1低端换流器由隔离转连接时,出现了旁路BPI刀闸拉开后自动合上的故障现象;分析了旁路BPI刀闸误动的原因,给出了相应的解决方法,并在调试间隙进行实施,有效地解决了刀闸误动故障,为以后直流系统调试提供了参考。

In the open circuit test with no load connected of low voltage converter at Qilian Station (±800 kV), when the very low voltage converter is switched from off to on, the BPI bypass switch closes automatically after being opened. This paper analyzes the cause of the inadvertent actuation of BPI bypass switch, and gives the corresponding solutions, which are implemented during the debugging and effectively solve the inadvertent actuation problem of the bypass switch, providing a reference for the future debugging of DC system.