Power Cables with Crosslinked Polyethylene Insulation and Their Screens Grounding Features

摘要

An analysis of existing technologies in the production of medium-voltage power cables with crosslinked polyethylene insulation (XLPE insulated power cables) was carried out, which showed that the strength and heat-resistant characteristics of cable insulation systems with silane crosslinked polyethylene and peroxide insulation are almost the same. Therefore, the use of a cheaper, but not inferior in terms of basic parameters technology may become preferable in the production of XLPE insulated power cables for a voltage of 10 kV. The features of the XLPE insulated power cables functioning for various screens connection and grounding schemes are considered. It is proposed to introduce into the regulatory documents for single-core XLPE insulated power cables the order of cable lengths with one-sided grounding of the screen and with the partition of the cable screen into sections. Since the production of three-core XLPE insulated power cables with sector-shaped conductors and their common screen has been mastered at present, it is necessary to consider their use as an alternative to single-core cables.