Digital location of partial discharges in HV cables

A new technique is proposed for locating partial discharges (PD) in synthetically insulated high voltage cables. The novel method digitally separates the two PD pulses before they are filtered by predictor filters. An experiment on a 20 kV cable under real stress conditions was carried out to test the efficiency of the new technique for fault location and noise suppressiom. It demonstrated the influence of the pulse magnitude and distance in PD detection under noisy conditions.