一起变电站异常局放信号的声电联合定位测试

Sonic-electrical combined orientation study on an abnormal PD signal in a substaiton

针对本单位某35kV变电站35kV开关柜出现暂态地电位信号偏大的问题,本文对该变电站进行了局放检测、定性、定位测试。为了定性、定位的准确,本文采用了声电联合的测试方法。首先根据局放的特高频、超声、高频电流检测信号的谱图,判断其放电类型为悬浮放电,然后根据定位结果,找到了其放电源的位置。

Since high level TEV signal have been detected in various locations in a 35kV substation, we carried out PD detection, recognition and orientation experiment in the substation. First, according the UHF, ultrasonic and high frequency current probes＇ measurement, we judged that it＇s floating discharge. Then, according the orientation process, we found the location of the PD source.