一起GIS电缆终端气室局放异常缺陷分析

Defect Analysis of Cable Terminal In GIS

2017年6月,在对110kV福地站110kVGIS设备进行年度带电局放测试时发现,110kV地双线1236间隔电缆终端气室存在异常特高频信号,幅值最大53dB,无超声波信号。经进一步定位诊断认为,B相电缆终端位置存在悬浮放电可能。因此,决定将设备解体检查,并将B相电缆以及两侧终端一并更换。

In June 2017,during the annual on-band test of 110 kVGIS equipment at 110 kV Fudi Station,it was found that there was an abnormal UHF signal in the air Chamber of the 1236 interval cable terminal with an amplitude of up to 53 dB. No ultrasonic signal.After further positioning diagnosis,it is concluded that there may be suspension discharge in the terminal position of B-phase cable.Therefore,it was decided to dismantle the equipment and replace the B-phase cable and the two sides of the terminal.