Suppression of the Electrical Tree Growth in Solid Insulation Using a Transverse Layer of Dielectric Barrier

Abstract

A solid insulation with a transverse layer of dielectric materials is described to investigate the effect on the growth of electrical trees. A needle to plane electrode is used for the simulation of the sharp protrusion in underground cable that causing tree inception field. A simulation field in polyester resin with a layer of dielectric barrier in different distance from the needle tip is presented using charge simulation method. The layer of dielectric barrier is chosen to demonstrate the suppression of the electric tree growth. The obtained results clear that the electric field simulated from charge simulation method in the presence of dielectric barrier having suddenly decreasing value in the barrier location, which reduce the probability of tree growth