联合测试方法在局部放电检测中的应用

Joint Testing Method Applied in Partial Discharge Detection

气体绝缘组合开关设备(GIS)的局部放电检测方法各有优缺点,选择几种检测方法的联合测试方法,可提高局部放电检测的准确度。介绍了上海市电力公司采用的联合测试方法的具体做法,通过对同时提取GIS局部放电的超高频、超声波、高频电流等信号的对比分析,提高了局部放电的定位精度和缺陷类型识别的准确性。实例验证了联合测试方法有重要工程意义。

There are various ways in gas insulated switchgear（GIS） partial discharge detection each with advantages and disadvantages,but the joint testing method to choose several detecting ways can improve the accuracy of the partial discharge（PD） detection.The joint testing method adapted by SMEPC is described.Joint test method extractes information on UHF signals,ultrasound signals or high-frequency current signals,improves PD location accuracy and defect recognition accuracy.An instance of the joint testing method shows its significance in engineering.