Simulation of Partial Discharges in Solid Dielectric Material: A Study on PD Magnitudes to the Parallel and

Abstract — The assessment of partial discharges (PDs) gives important information pertaining to the reliability of the high voltage power equipment. PDs occur in weaker regions like voids, cracks, and imperfections present inside the insulation. The PD is generally accepted as the predominant cause of long term degradation and failure of electrical insulation. Simulation environment is a significant approach towards the study of PD mechanism. In this paper, simulations of partial discharge with the single void whose axis parallel and perpendicular to the electric field was analyzed. The analysis has been carried out on characteristic parameters like PD magnitude, partial discharge inception voltage (PDIV) and apparent charge with respect to the geometric parameters of the void and also under different stress conditions. This study acknowledges the influence of PD activity inside the solid dielectric material. The relationship of PD magnitude with respect to the axes of the cavity in the direction of the electric field was compared. The computed and simulation results were presented. Keyword— Partial Discharges, Solid Insulation, Cylindrical Void, Apparent Charge.