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.