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

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.