Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
권호 표지
DOI QR코드

DOI QR Code

Electrical Breakdown Characteristics of LN2 under Simulated Quenching Conditions for Application of HTS Apparatus

고온초전도 기기응용을 위한 모의 \ulcorner치 환경에서 액체질소의 절연파괴 특성

  • 백승명 (경상대학교 전기공학과 및 컴퓨터 - 자동화응용 기술 연구소) ;
  • 정종만 (경상대학교 전기공학과 및 컴퓨터 - 자동화응용 기술 연구소) ;
  • 김상현 (경상대학교 전기공학과 및 컴퓨터 - 자동화응용 기술 연구소)
  • Published : 2002.11.01
Download PDF
⟨ Previous Next ⟩

Abstract

The electrical breakdown characteristics of liquid nitrogen(LN$\sub$2/) were studied under simulated quenching conditions for application of HTS apparatus. The experimental results for various quenching condition revealed that the breakdown voltage of LN$\sub$2/ with bubble flow velocity and gap spacing. In the case, breakdown voltage decreases gradually with the bubble velocity. When it is bubble velocity from 0 to 1 $\ell$ /min, breakdown voltage rapidly decreases but decreases from 2 $\ell$/min to 10 $\ell$/min slowly. The breakdown voltage for vertical electrode arrangement is higher than that for horizontal electrode arrangement. Also, it did a electric field and potential distribution interpreting at the liquid nitrogen when the bubble existed. The plots of equipotential lines for three cases are also shown.

Keywords

References

  1. Cryogenics v.38 630kVA high temperature superconductiong transformer H. Zueger https://doi.org/10.1016/S0011-2275(98)00104-0
  2. IEEE Trans. on Appl. superconductivity v.11 no.1 Qualification results of a 50 m-115 kV warm dielectic cable system M. Nassi;N. Kelley;P. Ladie;P. Corsaro;G. Ciletta;C. Von Dollen https://doi.org/10.1109/77.920334
  3. 한국전기전자재료학회논문지 v.11 no.7 0.7 MJ UPS용 초전도 케이블의 ？？치 특성 류경우;김해종
  4. IEEE Trans. on Dielectrics and Electrical Insulation v.9 no.1 Cryogenic liquids-aprospective insulation basis for future power equipment J. Gerhold https://doi.org/10.1109/94.983888
  5. 한국전기전자재료학회논문지 v.4 no.2 액체 질소의 절연 특성에 미치는 전극효과에 관한 연구 김상현;김정호;윤문수;권영한
  6. IEEE Trans. on Power Delivery v.11 no.3 High voltage insulation performance of cryogenic liquids for superconducting power apparatus H. Okubo;M. Hikita;H. Goshima;H. Sakakibari;N. Hayakawa https://doi.org/10.1109/61.517498
  7. Cryogenics v.38 Electrical insulation characteristic of supercinducting power apparatus M. Hara;H.Okubo https://doi.org/10.1016/S0011-2275(98)00095-2
  8. 한국전기전자재료학회논문지 v.11 no.4 극저온 액체의 동적 절연파괴 특성 김상현;김현희;김영석;정종만;정순용
  9. Proceedings of 13th International Conference on Dielectric Liquids(ICDL '99) Generation of bubbles in liquid argon and nitrogen in divergent electric fields A. Dentat;F. Jomni;F. Aitken;N. Bonifaci
  10. IEEE Trans. on Dielectrics and Electrical Insulation v.7 no.1 Patrial and complete electrical breakdown in simulated high temperature superconducting coils B. Y. Seok;H. Komatsu;J. Suehiro;M. Hara https://doi.org/10.1109/94.839344