110kV GIS设备避雷器故障定位分析

Fault Location Analysis of Arrester for 110kV GIS Equipment

对110kV GIS设备进行超声波、特高频、高频电流法测试,发现避雷器气室存在悬浮电位放电,超声波信号、特高频信号异常,且两种信号具有很强的相关性。由避雷器气室内存在多个信号源,初步判断信号来自避雷器气室内部靠近C相金属导杆与盆子连接处。

The 110kV GIS equipment was tested by ultrasonic UHF and high-frequency current methods.It was found that there was a floating potential discharge in the air chamber of the arrester.The ultrasonic signal and UHF signal were abnormal,and the two signals have strong correlation.In view of multiple signal sources in the gas chamber of the arrester,the source of the signal is initially determined to be close to the junction of the C-phase metal guide rod and the basin at the interior of the gas chamber of the arrester.