Research and Development of XLPE Insulated DC Cable

Abstract

This paper describes the developmental research of DC XLPE cable. Through a series of material investigations, XLPE compound containing highly purified special filler was developed.
To check the DC insulation performance of the cable insulated with this new material, a prototype cable with 9mm insulation thickness was manufactured. It was confirmed that the performance of the prototype cable was excellent. Based on the study of the prototype cable, a 250 kV DC cable with 20mm insulation thickness was designed and manufactured. Through a series of voltage tests, excellent DC insulation performance of the developed cable was verified.