Technological Development of High Temperature Superconducting Power Transmission Cable

Abstract

A High-Tc superconducting cable (HTS cable) is expected as an underground power line supplying the electrical power to the densely populated city in future. Therefore, compact HTS cables that can replace the old cables in their existing ducts have been developed. This paper reports our development state of important technologies for realizing the HTS cable, such as decrease of AC losses, electrical insulation and the electrical properties due to mechanical stresses. Moreover, a 20m HTS model cable was fabricated by Furukawa's funds to establish manufacturing process of a long HTS cable and to investigate effect of the various manufacturing, handling, operating loads that an actual conductor will experience on superconducting properties.