某500kV变电站TSC支路电容器故障分析

介绍了某500kV变电站TSC支路电容器故障过程及现象,从故障时的运行参数、TSC电容器组的投运情况、谐波影响分析和设备老化方面对故障发生的原因进行了分析,通过分析确定故障的原因为电容器绝缘老化。同时,提出了对电容器组进行普查,必要时进行更换,加强电容器组日常维护等建议。

Fault Analysis of the TSC Branch Capacitor in a 500kV Substation

In this paper, the failure process of the TSC branch in a 500kV substation is presented. The cause of the failure is analyzed from the aspects of the operation parameters, the operation condition of the TSC capacitor, the harmonic influence and the capacitor's insulation aging. The capacitor's insulation aging is identified to be the exact cause of the failure. Some advices to avoid the failure are proposed, such as general survey of the capacitor, replacing some of the capacitor if it is necessary, strengthening the routine maintenance of the devices.