Progress in Superconductivity and Cryogenics (한국초전도ㆍ저온공학회논문지)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
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Effects of Pressure on the Breakdown Characteristics of Cryogenic Liquid and Gaseous Nitrogen

극저온 액체 및 기체 질소의 압력에 따른 절연파괴 특성

  • 백승명 (경상대 대학원 전기공학과) ;
  • 정종만 (경상대 대학원 전기공학과) ;
  • 김상헌 (경상대 대학원 전기공학과)
  • Published : 2002.11.01
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Abstract

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 . It is very important from a point of superconducting apparatus protection to elucidate breakdown characteristics in $LN_2$ and $GN_2$ at atmospheric and pressurized conditions Therefore. this paper studies the effect of pressure on the breakdown characteristics in $LN_2$ and $GN_2$. Af high voltage is applied to electrode system with uniform and non-unform field in various gap length. And Breakdown voltages of $LN_2$ and $GN_2$ are investigated under AC voltage for Pressure ranging from 0 and 0.5 MPa. This research presented basis information of electrical insulation design for liquid nitrogen immersed HTS power apparatus.

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References

  1. Cryogenic v.19 Dielectric breakdown of Cryogenic gases and liquids J.Gerhold https://doi.org/10.1016/0011-2275(79)90030-4
  2. IEEE Trans. Electr. Insul. v.20 Effects of voltage on dielectric breakdown characteristics in gaps partially immersed in liquid nitrogen T.Kaneko;M.Hara;M.Akazaki
  3. IEEE Electrical Insulation Magazine v.6 no.4 The High Voltage Design of Superconducting Power Transmission Systems E.B.Forsyth
  4. IEEE Transactions on Dielectrics and Electrical Insulation v.4 no.1 Breakdown Mechanism of Liquid Nitrogen Viewed from Area and Volume Effects N.Hayakawa;H.Sakakibari;H.Goshima;M.Hikita;H.Okubo https://doi.org/10.1109/94.590883
  5. J. Appl. Phys. v.80 The Behavior of Small Bubbles Generated by Electrical Current Impulses over a Wide Range of Applied Pressures F.M.J.MacCluskey;A.Denat https://doi.org/10.1063/1.363098
  6. Cryogenics v.36 Behaviour of liquid nitrogen between electrodes in a microgravity environment Y.Suda;M.Itoh;Y.Sakai;K.Matsuura;N.Honma;T.Kimura https://doi.org/10.1016/0011-2275(96)00054-9
  7. IEEE Transactions on Dielectrics and Electrical Insulation v.9 no.1 Thermally and Electrically Induced Bubbles in Liquid Argon and Nitrogen A.Denat;F.Jomni;F.Aitken;N.Bonifaci https://doi.org/10.1109/94.983879