R & D of superconductive cable in Japan

Super-ACE (Superconducting AC Equipments) project was started in 2000 fiscal year as a national project to research and develop superconducting AC power equipment. This project goal to develop basic technologies for high temperature superconducting (HTS) cable, HTS fault current limiter (FCL), HTS magnet for reactor and transformer. Main subjects of the cable study are development of: HTS conductor having 3 kA rated current with 1 W/m AC loss, cooling technologies for a 500 m HTS cable with 1 kA rated current, and analytical study of integrated HTS power system. This paper describes major results of studies on the HTS superconductors, and outline and some results of verification test of 500 m cable.