电缆接头局部放电在线检测系统及其应用

On-line Detection System for Partial Discharge of Cable Joint and its Application

简要介绍了电缆接头局部放电测试系统的工作原理及主要抗干扰方法——极性鉴别。应用该检测系统对运行中的220 kV电缆接头进行了现场测试,结果证明综合呆用极性鉴别、小波分析等抗干扰方法,可以有效地测试到运行电缆接头的局部放电信号。

The paper introduces the principle of on-line detection system for partial discharge of cable joint and its main antiinterference method, polarity discrimination method. Using the system to measure 220 kV cable joints in operation on site, results show that true partial discharge signal of the cable joints can be obtained by a combination of the anti-interference methods, such as the polarity discrimination and wavelet analysis.