电缆局部放电测试中本体放电和干扰的识别及放电点的准确定位

Discrimination between Intrinsic PD and Interfering Singnal in Cable PD Measurement and Pinpoint of PD Spot

根据交联电缆放电模型,阐述了电磁波行波在电缆传输中的特性参数和识别电缆放电的图像特征,并介绍干扰信号的识别和排除方法。同时根据电缆的放电传播方式,介绍了电缆发生放电时放电点的定位方法,着重介绍了端头放电的波形识别和定位方法。实践证明该办法是有效的。

This paper presents the characteristics of traveling wave transmitted by cable, identification of the cable PD pattern and identification/removal of interfering signals based on a PD model of XLPE cables. It also presnts PD location technique based on the cable PD pattern, focus being laid on identification of the waveform of the cable end PD and the location technique. This technique proved to be effective in practices.