Pancake coil형 고온초전도 기기의 응용을 위한 극저온 냉매의 절연파괴 특성

Breakdown Properties of Cryogenic Coolant for Pancake Coil Type High $T_{c}$ Superconducting Equipment

  • 백승명 (경상대학교 공과대학 전기공학과(공학연구원 자동화·컴퓨터 연구센터)) ;
  • 정종만 (경상대학교 공과대학 전기공학과(공학연구원 자동화·컴퓨터 연구센터)) ;
  • 이진호 (경상대학교 공과대학 전기공학과(공학연구원 자동화·컴퓨터 연구센터)) ;
  • 김상현 (경상대학교 공과대학 전기공학과(공학연구원 자동화·컴퓨터 연구센터))
  • 발행 : 2002.02.01

초록

In the design of superconducting power equipments such as transformer, cable and fault current limit, knowledge of the dielectric behavior of both liquid and gaseous at very low temperatures is very importance. Especially, Electrical properties of liquid nitrogen($LN_{2}$) and gaseous nitrogen($GN_{2}$) have become of great interest again since the discovery of high temperature superconductors. However, many sources of $LN_{2}$and $GN_{2}$ problems in the test of pancake coil model arising form the deficiency of insulation data. Therefore, this paper describes the results of an experimental study on the ac breakdown voltage($V_{B}$) properties of $LN_2$ and Air under the electrode of simulated HTS pancake coil. The ac breakdown voltage of $GN_{2}$ have been measured by pancake coil-pancake coil gaps over the temperature range of 293 K to 77 K.

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