EFFECT OF INSULATION DEFECTS ON ELECTRIC FIELD DISTRIBUTION IN MV CABLE XLPE

Abstract

Power cables are of importance in power transmission and distribution systems. During cable
production, the procedures must be followed at every stage of production and quality control must
be done precisely to have the cable quality completely by design, without defects. However, during
the manufacture and operation of cables, defects may appear in different locations, shapes and sizes
in the insulating material. The influence of defects on the electric field distribution is the causes of
failure in the cable and electrical system. The change of electric field distribution when the defects
are air particles and copper impurities in XLPE cable insulation are analyzed in the paper.