一起10kV中性点消弧线圈有载分接开关放电故障浅析

Analysis of Discharge Failure of On-load Tap-changer with 10 kV Neutral Point arc Suppression Coil

真空有载分接开关作为接地变压器中性点消弧线圈的调匝装置,是调节接地短路电容电流必不可少的部分,本文介绍了一起110kV某变电站10kV线路发生接地短路时分接开关的放电故障经过,分析判断了故障过程和故障原因,并提出了具有针对性的预防和改进措施。

The vacuum on-load tap-changer is used as the monitoring device for the neutral point arc-suppression coil of the grounding transformer. It is an indispensable part to adjust the grounding short-circuit capacitor current. This paper introduces the tap changer when a 10 kV line of a substation of 110 kV is grounded. After the discharge failure, the fault process and the cause of the fault are analyzed and judged, and targeted prevention and improvement measures are proposed.