Exploration of cross-linked polyethylene material morphological structure and its dielectric properties studied by the effect of pulse voltage

Abstract

Over the past few decades, an increasing interest in using polymer in the power distribution cables. Earlier studies shown that cross-linked polyethylene (XLPE) have excellent mechanical and dielectric properties. However, recent publications relate that the judgment of reliability in polymer matrix depend upon the water or electrical trees. The origination and progression of trees in the polymer morphology leads to conjecture role. The tremendous performance of the XLPE insulation materials is mostly dependable on the cleanliness. But the inclusion of impurities in the insulating materials leads to premature aging phenomena and constitutes a foremost concern for the power utilities. This has been studied in the context of presence of contaminants in the insulation and shield region, but studies applicable to contaminants such as silicon, sulphur, selenium and phosphorous have been limited. The results of a study of the polarization behavior in the insulation containing various impurities, using the proposed research techniques of pulse voltage method. This eminent method was convincingly used for the surveillance of XLPE contaminated insulation successfully.