Improvement of High-Voltage Glass Insulators

Abstract

High-voltage suspension insulator Cement shell Electric field intensity Partial dischargeThe design features of high-voltage glass disk suspension insulators are considered in the paper. The electric field of the insulator was studied using its appropriate modeling in the Comsol Multiphysics simulation software. It was found the dependence of the maximal values of voltage applied to the insulator, under which the breakdown of the inclusion (pores) in the cement shell occurs, on the diameter of the pore. An improvement of the design of the insulator is proposed, the implementation of which consists of increasing the radius of curvature of the conical part of the rod. It is shown that with a change of the radius of curvature of the conical part of the insulator core from 0.5 to 3.5 mm, the maximal electric field intensity reduces and the threshold value of the partial discharge voltage in the cement shell increases, which will decrease the level of radio interference of the insulators. The results can be used to create new designs for high-voltage disc suspension insulators with improved radio interference performance.