电缆局部放电波形特征与脉冲传播研究

Study on Partial Discharge Waveform Characteristics and Pulse Propagation of the Cable

为了研究电缆头局部放电的波形特征,制作了6种故障电缆头进行了局部放电试验,获取了典型的局放波形信号。对信号提取特征参数包括等效时间和等效频率,可以对波形信息进行有效表达,以区分不同类型的放电和噪声。结合脉冲在长电缆中传播的试验结果,分析了传播前后特征参数的变化情况,结果可用于测试信号的分类和定位。

For the study of partial discharge （PD） waveform characteristics,typical PD waveforms tests are put forward on six kinds of cable-joint faults.Equivalent time and frequency of the waveform are calculated.The two parameters can express the waveform characteristics effectively and distinguish different kinds of PD or noise.With the result of pulse propagation in the long cable,the change of parameters before and after propagation is analyzed.This results can be adapted for the classification and location of test signal.