Partial Discharge Detection Technique Using Polar Coordinate Phase-Resolved Pattern in Rail Transportation Gas-Insulated Substation

Abstract

It is known that there are several kinds of PD patterns to be applied to describe the insulation defects in rail transportation GIS. In order to solve the problems of discontinuous discharge region when using the traditional PRPD pattern, the polar coordinate phase-resolved PD pattern approach to characterize insulation defect states is presented. PRPS data sets are accessed through the experiments on the insulation defects physical models in the GIS test sample. The data collecting uses the UHF measuring setup. The steps to plot the proposed polar coordinate pattern based on PRPS data sets are described in details. It is proved through the experiments that, a much clearer characterization of the defect types can be made by this new proposed pattern. And the distinguishing characters can be extracted from the new pattern.