China s 30 m, 35 kV/2 kA ac HTS power cable project

Abstract

A project for a 30 m, 35 kV /2 kArms, 3 phase, warm dielectric HTS power cable system is underway in China. This system will be installed in the China Southern Power Grid at the Puji substation in Kunming, Yunan province, in 2004. We have carried out a series of experiments to investigate the possible winding angles and layer configurations of the cable conductor with Ag sheathed Bi-2223 tapes, different LN2 cooling mechanisms, termination configurations, and fabrication techniques. For better understanding of the basics of an HTS cable system and practising new fabrication techniques, a 4 m superconductor cable with terminations and a closed cycle cryogenic system was built and tested. In this paper, we give the detailed parameters of the 30 m cable system and the work plan of the project.