Development of EHV Cross-Linked Polyethylene Insulated Power Cables

To apply cross-linked polyethylene for EHV cable insulation, several cables are designed, and manufactured and their characteristics are measured. By manufacturing, normal cross-linked polyethylene are used for comparison together with special cross-linked polyethylene insulations which have been newly developed. It is found that non-carbon filled and voltage-stabilized insulations possess excellent properties in corona and treeing deterioration resistance, and electrical breakdown strength which indicate the possibility of application these cables to real service. Problems and aspects of plastic-insulated power cables for higher voltage grades, such as 275kV class, are discussed.