抄録
This paper describes the development of ±500 kV DC XLPE cable. The purpose of this study is to improve the impulse breakdown strength of XLPE insulation with filler using highly-purified inorganic filler with uniform diameter. It is revealed that the impulse breakdown strength of the improved filler-added XLPE cables increased from the test results of model cables. In the next stage, the ±500 kV DC submarine cable involving factory joint was designed and manufactured using the XLPE insulation with the above improved filler. Both mechanical and electrical tests were then carried out to verify the performance of the DC XLPE cable, which showed that it has sufficient initial performance for practical use of 500kV submarine cable system
