The action of corrosion on electric field distribution in high-voltage cable insulation
The electric field distributions in three-layer insulating structure of high-voltage power cable insulated with cross-linked polyethylene (XLPE) are studied by computer modeling under condition of the corrosion of the aluminum conductor and copper shield /neutral of the cable. The different shield configurations such as concentric neutrals, helicoidal copper tape and longitudinally corrugated metallic shield are considered. The electric field problems are solved using standard software and finite-element method for both axially symmetric model of the cable and its cross-section. The action of the corroded metallic cable components on the values and patterns of electric intensity in the adjoining conductor shield and insulation shield and in main insulation is shown. References 15, figures 5.