Abstract
Superconducting cable is expected to be one of the most economical ways to improve both the stability and capacity of electrical transmission and distribution lines, so several studies of high-temperature superconducting (HTS) cable have been initiated around the world. SEI was recently engaged by the Korea Electric Power Corporation (KEPCO) to install a 22.9kV–1250A HTS cable system, comprising a 100m HTS cable, two terminations and a cooling system, all manufactured in Japan and shipped to the KEPCO Gochang test site in Cheolabuk-Do, ROK (Republic of Korea). After system installation and assembly, the cable was cooled with liquid nitrogen. Following several checks, including measurements of critical current and heat loss, and AC voltage and current tests, a commissioning test saw the cable carry 1250A at 22.9kV for 48h, meeting all requirements. This report outlines the KEPCO HTS cable project, including system design, manufacture, installation and testing.
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