Development of new 500 kV laminated paper insulated self-contained oil-filled cable and its accessories

Abstract

This paper describes the development of cellulose paper/plastic film/cellulose paper laminate insulated Self-Coritained 500kV Oil-Filled (OF) Cable and its accessories. Dielectric loss of this new cable was confirmed to be about one third that of conventional kraft paper cable. Moreover, by employing the reduced insulation thickness of 25 mm rather than that of 33 mm, as is usual with conventional cables, the new cable could be made very compact, due to the high dielectric strengths of laminated paper. As a result, the shipping reel length of the new cable, which is about 10% lighter in total weight and 10% smaller in overall diameter than conventional cables, could be dramatically increased. The reliability and the stability of the new cable have been demonstrated by the successful completion of a one and a half year field test.

Breakdown Characteristics of Composite Insulation for High Temperature Superconducting Cable

“…The high temperature superconducting (HTS) cable is anticipated to transport large electric power densities with a compact size due to high critical current density property of HTS conductor compared to that of conventional copper ones [1,2]. Polypropylene laminated paper (PPLP) has been used as oilfilled power cable insulation to replace Kraft paper because of its lower dielectric loss and higher dielectric strength [3,4]. Recently, PPLP has been used as insulation for HTS power cable because its dielectric loss is smaller than that of Kraft paper and nearly the same with oriented polypropylene laminated.…”