35kV开关柜局部放电检测分析

Detection and Analysis of the Partial Discharge in 35 kV Switchgear

通过对35 k V开关柜进行带电测试,发现柜内存在局部放电。利用特高频及高频传感器进行准确定位,停电检查后发现开关柜中穿柜套管的等电位接触不良造成悬浮放电。针对开关柜的结构设计缺陷,采取改变等电位连接的方式,并提出了针对此类缺陷的防范措施。

The partial discharge was found in a 35 kV switchgear when the online detect was conducted. By using UHF and HF methods, the defect was loeated accurately that a suspended discharge occurred caused by potential poor contact on the wall bussing, which was confirmed by off-line examination. Aiming at structural design defects of switchgear, the equal potential connecting structure was changed, and preventive measures were proposed to against such defects.