高压开关柜局部放电检测及应用

Detection and Application of Partial Discharge for High Voltage Switchgear

局部放电测试是发现开关柜早期缺陷有效手段之一,基于特高频法、暂态地电压法及超声波法的检测原理,分析了一起10 kV高压开关柜的局部放电案例,经停电处理,初步判断该放电类型为悬浮放电,并采取针对性措施,成功避免了缺陷的进一步扩大,保障了开关柜安全稳定运行。

The partial discharge test is one of the effective methods to detect the early defect of switchgear.Based on the testing principle of ultra high frequency(UHF),transient earth voltage(TEV),and ultrasonic(AE),this paper analyzed a case of partial discharge fault in 10 kV high-voltage switchgear.After outage processing,this discharge type was preliminarily judged as the suspension discharge and the pertinent measure was adopted,so as to successfully avoid the defects enlarged further,which guarantees the safe and stable operation of the switchgear.