Earticle

초록

영어

A sub-cooled liquid nitrogen cooling system is known as a most promising method to develop large scale superconducting apparatuses such as superconducting fault current limiters and superconducting cables [1]. Gaseous helium (GHe), gaseous nitrogen (GN2) and sulfur hexafluoride (SF6) are commonly used for designing an high voltage applied superconducting device as an injection gaseous medium [2, 3]. In this paper, the analysis on the dielectric characteristics of GHe, GN2 and SF6 are conducted by designing and manufacturing sphere-to-plane electrode systems. The AC withstand voltage experiments on the various gaseous insulation media are carried out and the results are analyzed by using finite element method (FEM) considering field utilization factors (ξ). It is found that the electric field intensity at sparkover (EMAX) of insulation media exponentially decreases according to ξ increases. Also, the empirical expressions of the functional relations between EMAX and ξ of insulation media are deduced by dielectric experiments and computational analyses. It is expected that the electrical insulation design of applied superconducting devices could be performed by using the deduced empirical formulae without dielectric experiments.

목차

Abstract
 1. 서론
 2. 절연내력실험 set-up
  2.1. 절연내력실험
  2.2. 전극시스템
  2.3. 전계해석
 3. 절연내력실험 결과분석
  3.1. 절연내력실험 결과
  3.2. 결과분석
 4. 논의
 5. 결론
 참고문헌

키워드

저자

• 강형구 [ H Kang | 정회원 : 충주대학교 전기공학과 전임강사 ] 교신저자
• 고태국 [ T. K. Ko | 정회원 : 연세대학교 전기 전자공학부 교수 ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  한국초전도·저온논문지 (구 한국초전도저온공학회논문지) [Progress in Superconductivity and Cryogenics]

• 간기

  계간

• pISSN

  1229-3008

• eISSN

  2287-6251

• 수록기간

  1999~2026

• 등재여부

  KCI 등재,SCOPUS

• 십진분류

  KDC 427 DDC 537