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ELECTRIC FIELD ENHANCEMENT IN POLYETHYLENE CABLE INSULATION WITH DEFECTS
Author
Abstract The computer modeling of electric field distribution in the cable polyethylene insulation with defects (porosity along the insulation in radial direction and contamination due to the fault at application of insulation layers during the production process) is carried out. The distributions of volumetric electric force and equivalent tensile stress in the insulation are computed in the case of the contamination. The effect of the defects on electric intensity near the conductor screen (inner semiconducting layer) and the dependence of the distributions and maximum electric intensity on the electric properties of the porous medium, shape of the contamination and its proximity to the cable conductor are revealed. References 11, figures 5.
Key words: polyethylene insulation of power cable, macro-sized defects, electric field problem, electric field enhancement, electromechanical stress, computer modeling.
Received: 19.06.2017
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