FAST MEASUREMENTS OF PARTIAL DISCHARGES IN POLYETHYLENE CAVITIES WITH THE AID OF A SUBDIVIDED ELECTRODE ARRANGEMENT: A STUDY OF CIRCUIT PARAMETERS ON THE WAVESHAPE OF THE DETECTED PD CURRENTS

Michael G. Danikas

   Cavities enclosed in insulating materials are usually the source of partial discharges which in turn cause the deterioration of the surrounding material leading to ultimate failure. A study of fast partial discharge current measurements is essential to the understanding of discharge mechanisms. Especially the study of discharge currents with the aid of modern digitizers may give new insights as to the workings of partial discharges. In this paper, a detailed study of the electrode set-up together with the relevant circuit parameters influencing the partial discharge current waveshape are given.

Keywords: cavities, fast partial discharge measurements, electrode arrangement, insulation life time

[full-paper]