INFLUENCE OF AGING ON CLASSIFICATION OF PD IN HV COMPONENTS

In this presentation the influence of degradation of discharging diele ctric on phase-resolved patterns of partial discharges (PD) is studied . Using conventional PD detection and statistical analysis, internal d ischarges in a flat cavity, and in epoxy insulation of two HV componen ts were analyzed during long term tests. The results indicate that agi ng progress was accompanied by few consecutive changes in the phaseres olved patterns. This observation might become important for two applic ations: the developing of databases of different discharging defects, and the analysis of discharge degradation of dielectrics.