Korea energises high-voltage direct current superconductor cable

Korea Electric Power Corporation (KEPCO), LS Cable & System and AMSC announced that a high-voltage direct current (HVDC) high-temperature superconductor (HTS) cable has been energized on Jeju Island's smart grid demonstration site.

The 500 metre, 80kV DC cable is powered by AMSC's Amperium® HTS wire and installed in KEPCO's electricity grid. "We believe Korea is the earliest country in the world to adopt smart and clean energy such as smart grid, Energy Storage System (ESS), and micro grid. The energising of the first direct current high-temperature superconductor cable in a real grid demonstrates KEPCO's commitment to developing world-class, leading-edge technologies," said Hwan-Eik Cho, President & CEO, KEPCO.

HVDC HTS cables are power dense and have zero resistance, making them an ideal solution to moving large amounts of power underground and with a minimal footprint. Capable of conducting 150 times the amount of electricity that can be conducted by copper or aluminum devices of the same size, HVDC HTS cables also benefit from no electrical losses, making them a perfect conductor of electricity. Designs exist for future cables that the company anticipates will be capable of moving up to 10 gigawatts (GW) of power within an 8 metre right-of-way. A similar overhead circuit would require multiple extremely high-voltage circuits and an approximately 120 metre right-of-way.

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