The deduction of partial discharge pulse current from its radiating UHF signal

Abstract

In this paper, a new method for obtaining partial discharge (PD) characteristic based on ultra-high frequency (UHF) measurements is presented. According to electromagnetic theory, the PD electromagnetic radiation can be regarded as the dipoles radiation. Based on which, the radiation model of partial discharge pulse current is established. The waveform parameter of PD pulse current can be obtained by spectrum analysis of its radiation UHF signal, and the waveform of PD pulse current can be deduced by the time integral of its radiation UHF signal. The result of simulating experiment shows that the method for deducing PD pulse current is effective and is contributed to the PD pattern recognition and insulation defect diagnoses