극저온 환경을 고려한 기압별 N2+SF6, N2+CF4, N2가스의 절연파괴 전압 값을 이용한 최대전계 분석

Abstract

High voltage cryogenic insulation issues need to be addressed in order to promote the commercialization of high temperature superconducting (HTS) equipment. As a fundamental step in the development of the optimum bushings for HTS devices, the breakdown characteristics of liquid nitrogen mixed with liquefied insulating gases such as N2, SF6, and CF4 have been investigated. In order to investigate the possibility of substituting CF4 gas for SF6 gas for the bushings of HTS electrical equipment, AC withstanding voltage tests have been performed. In this paper, finding the maximum electric field Emax using utilization factor. This result is applicable to developing the real scale HTS equipment of the design parameters.