Takahiro Kanaya, Sakurako Tomii, Naoto Shigemori, Kazuyoshi Akizuki, Yutaka Suzuki

Abstract

We have developed an insulating material whose main component is crosslinked polyethylene (XLPE) that can be applied to extra-high voltage DC cables. The actual DC cable was manufactured with the material by utilizing the supply chain built after optimizing the stable supply and handling of raw materials. As a result of conducting various inhouse and outside evaluations on the cable, it was confirmed that all the characteristics were satisfied. We have already completed a long-term energization test of a DC 525 kV class cable system, and we believe that we can make a major contribution to the expansion of renewable energy in the future.

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