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

Characteristics of Surface flashover in LN2

액체질소 중에서의 연면방전 특성

  • 정종만 (경상대학교 전기공학과 및 공학연구원) ;
  • 백승명 (경상대학교 전기공학과 및 공학연구원) ;
  • 김상현 (경상대학교 전기공학과 및 공학연구원)
  • Published : 2003.01.01
Download PDF
⟨ Previous Next ⟩

Abstract

For the development of superconducting power apparatus, it is necessary to establish the dielectric technology in coolant like L$N_2$. Therefore in this paper we conducted experiment of surface flashover that could occur in the windings of HTS transformer which will be developed in the pancake coil type. First, we distinguished two types of surface flashover by electrode alignment, such as parallel and vertical, and then compared with each characteristics of surface flashover. The flashover voltage was more affected by thickness of spacer than by surface length when the thickness of spacer is over 1 mm. And the surface flashover with metallic particle attached on the spacer was tested, it was affected by the particle position. The more close to the electrodes, the worse the characteristics. Also the experiment was conducted when the electrode was immersed in liquid nitrogen(L$N_2$) partially. The surface flashover characteristics of spacer was, when immersed partially in 50%, rapidly decreased.

Keywords

References

  1. Power Engineering Society Winter Meeting 2001 IEEE v.2 Application of HTS wire and cables to power transmission: state of the art and opportunities Nathan Kelley;Marco Nassi;Lawrence Masur https://doi.org/10.1109/PESW.2001.916883
  2. IEEE Trans. on Applied Superconductivity v.11 no.1 Consideration about HTS superconducting transformers G. Donnier-Valentin;P. Tixador;E. Vinot https://doi.org/10.1109/77.920059
  3. IEEE Trans. on Applied Superconductivity v.11 no.1 Comparison of solenoidal and pancake model windings for a superconducting transformer M. Polak;P. Uask;J. Pitel;L. Jansak;Z. Timorasky;F. Zizek;H. Piel https://doi.org/10.1109/77.920053
  4. IEEE trans. on Power Delivery v.15 no.2 Superconducting transformer M. Yamamoto;M. Yamaguchi;K. Kaiho https://doi.org/10.1109/61.852991
  5. IEEE Trans. on Applied Sueperconductivity v.9 no.2 Critical current measurement on long BSCCO tapes using a contact-free method M. D. Bentzon;P. Vase https://doi.org/10.1109/77.784701
  6. IEEE trans. on Dielectric and Electrical Insulation v.9 no.1 Cryogenic Liquids-A Prospective Insulation Basic for Future Power Equipment J. Gerhold https://doi.org/10.1109/94.983888
  7. IEEE trans. on Dielectric and Electrical Insulation v.6 no.1 A study of thermal bubble behavior in the simulation electrode system of HT superconducting coils B. Y. Seok;N. Tamuro;M. Hara https://doi.org/10.1109/94.752018
  8. IEEE trans. on Electrical Insulation v.24 no.5 Surface flashover of insulations Carig Miller https://doi.org/10.1109/14.42158
  9. Cryogenics v.38 Electrical insulation specification and design method for superconducting power equipment M. Hara;J. Gerhold https://doi.org/10.1016/S0011-2275(98)00093-9
  10. 전기전자재료학회논문지 v.11 no.4 극저온 액체의 동적절연파괴 특성 김상현;김현희;김영석;정종만;정순용
  11. 전기전자재료학회논문지 v.5 no.3 초전도 케이블용 절연재료의 절연파괴특성과 기구에 관한 연구 김상현
  12. Cryogenics v.39 Thermo-mechanical properties of epoxy GFRPs used in superconducting magnet winding S. Usami;T. Suzuki;H. Ejima;K. Asano https://doi.org/10.1016/S0011-2275(99)00123-X
  13. 電氣學會技術報告 v.528 超傳導應用器機の電氣絶緣技術 日本電氣學會
  14. 전기전자재료학회논문지 v.13 no.2 액체질소 중에서 spacer의 부분적 침적에 대한 연면 방전특성 김영석;이병성;백승명;정종만;정순용;김상현