基于多种局放带电检测技术的GIS设备异常诊断与分析

Abnormal Diagnosis and Analysis of GIS Equipment Based on Live Detection Technologiesof Various Partial Discharge

针对某变电站GIS设备在例行检测过程中发现的异常信号,采用特高频、超声波与高频电流局放带电检测技术,结合SF_(6)气体成分,对缺陷进行了精确定位和诊断分析,确定了局放信号类型,并判断局放信号是由丙刀闸气室二次接线端子位置螺栓松动导致的悬浮电位放电缺陷,给出了相关处理意见和建议,为类似缺陷提供借鉴和参考。

In view of the abnormal signals found in the routine testing process of GIS equipment in a substation,the defects were accurately located and diagnosed by using UHF,ultrasonic and high-frequency current partial discharge charged detection technology combined with sulfur hexafluoride gas composition.The type of partial discharge signal is determined.The partial discharge signal is judged to be caused by the floating potential discharge defect caused by the looseness of the bolt at the secondary terminal of the C-knife air chamber.Relevant handling opinions and suggestions are given to provide reference and reference for similar defects.