交直流电压条件下GIS局部放电检测对比研究

为了探寻一种较为有效的检测GIS内金属导电微粒类典型缺陷的方法,建立了一套模拟GIS交流电压下和正、负极性直流电压下局部放电检测平台.利用脉冲电流法、超声波检测法对局部放电信号进行检测,对获得的大量实验数据和图谱进行比较分析.通过分析研究,提出了利用正极性直流电压下局部放电检测法对金属导电微粒类缺陷进行检测,该检测方法对金属导电微粒类缺陷最为有效,能够及时发现该类典型缺陷,且对GIS绝缘性能破坏小,具有良好的实际应用价值.

Study on Partial Discharge Detection in GIS under AC Voltage and DC Voltage

In order to explore an effective method for detecting the typical defects of metal conductive particles in GIS,a simulation platform was established to detect the partial discharge signals in both AC and DC voltage conditions.The partial discharge signals were detected by ERA and UT methods,and a large number of experimental data and maps were then obtained.Then,a method for detecting the typical defects of metal conductive particles by using the partial discharge detection under positive DC voltage was proposed by conducting comparative analysis and investigation.This detection method is most effective to detect the typical defects of metal conductive particles.It can discover the typical defects in time and only has a little damage to the insulating properties of GIS,so that it has important application value.