Zinc Oxide Surge Arresters and HVDC125 kV-upgrade 500kV Converter Stations:Power Technology of Japan through the Experience of Developments and Applications of Gapless Metal Oxide Surge Arresters

摘要

Gapless Metal (Zinc) Oxide Surge Arresters for a.c. systems contribute to the insulation co-ordination based on the suppression of lightning surges and switching surges. These gapless metal oxide surge arresters using ZnO elements are effective to HVDC systems. This paper describes basic characteristics of ZnO (zinc oxide) elements for d.c. systems and applications of gapless surge arresters to HVDC125kV frequency converters, HVDC250kV, upgrade HVDC500kV converter stations, and HVDC500kV Cables in Japan.