Development of High Voltage DC-XLPE Cable System

SPECIAL ISSUE

Development of High Voltage DC-XLPE Cable System
Yoshinao MURATA*, Masatoshi SAKAMAKI, Kazutoshi ABE, Yoshiyuki INOUE, Shoji MASHIO,
Seiji KASHIYAMA, Osamu MATSUNAGA, Tsuyoshi IGI, Masaru WATANABE, Shinya ASAI and Shoshi KATAKAI

We have developed a cross-linked polyethylene (DC-XLPE) insulating material that has excellent properties for DC voltage applications. Our high-voltage (HV) DC XLPE cable and factory joints using this material showed positive results in a polarity reversal test and other long-term tests aiming at high voltage operation up to 500 kV. In addition, this cable passed 250 kV pre-qualification tests and type tests, which also include polarity reversal tests, in accordance with the test conditions specified by the CIGRE TB 219. All the tests were conducted at 90°C and the results showed that our
HVDC XLPE cable and accessories are capable of normal operation and polarity reversal operation at 90°C in actual
HVDC link lines. J-Power Systems Corporation is now ready to supply this cable and related products to the market.
Keywords: HVDC, XLPE cable, type test, PQ test, CIGRE Technical Brochure

1. Introduction
High voltage direct current (HVDC) power transmission lines in Japan consist of Hokkaido-Honshu DC link and Kii Channel DC link that connects Shikoku with Honshu. As for HVDC power transmission in foreign countries, main applications have been for long-distance power transmission such as intercontinental links. However, in recent years, there has been a growing trend toward its application to offshore wind power generation, which is being actively introduced in Europe as a renewable natural energy source. As its introduction has progressed, the locations of the wind power generation facilities have been shifted from coastal areas to offshore areas due to space constraints. As the power transmission distance has increased, HVDC power transmission technology has drawn more attention.
Previously

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