EFFECT OF STRESS CONTROLLED ON ELECTRIC FIELD DISTRIBUTION IN HIGH VOLTAGE CABLE JOINTS

Abstract

Power cables are of importance in power transmission and distribution systems. Cable joints are the basic accessories of the power cables to to make connections between lines or to an electrical apparatus. The various aspects are considered while designing the cable terminations and joints because they must ensure the integrity their associated cables in the power transmission system. Electric field enhancement at the interface of materials can produce local discharges that could lead to either flashover along the insulation surface or dielectric breakdown causing cable failure. Cable terminations are designed to eliminate the stress concentration at the screen termination to avoid the break-down of the cable. The geometry of the stress controlled has a great influence on the electric field distribution in the cable joint. In this study, the effect of stress controlled on the electric field distribution in high voltage cable joints was calculated, analyzed and compared by the finite element method between different cable joint structures to obtain a suitable design of the cable joint.