Demonstration of a 500 m HTS power cable in the super-ACE project

Abstract

A demonstration of a 500 m single-core high-Tc superconducting (HTS) cable has been carried out by Furukawa, CRIEPI and Super-GM at the CRIEPI site in Yokosuka, Japan. The cable was a cryogenic dielectric type rated at 77kV/1kA. In the test, critical currents (Ic) of HTS conductor and HTS shield at 73 K were 1910 A and 1620 A respectively, with heat invasion of 1.21 W/m, and a pressure drop of 100 Pa/m at an LN2 flow rate of 50 L/min. Rated loading tests corresponding to degradation of the insulation over 30 years were carried out, and there was no degradation in the cable. Moreover, overload and limiting tests were performed under the adverse conditions of over-voltage, over-current and stopping of refrigerators and pumps. After these events, the cable was removed and studied, revealing almost no damage. © 2006 IOP Publishing Ltd.