Progress in Superconductivity and Cryogenics (한국초전도ㆍ저온공학회논문지)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
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A study on the breakdown probability distribution of materials for conduction-cooled HTS SMES

  • Choi, J.H. (Department of Electrical Engineering, Gyeongsang National University and Engineering Research Institute) ;
  • Kim, W.J. (Department of Electrical Engineering, Gyeongsang National University and Engineering Research Institute) ;
  • Kim, H.J. (Superconductivity Research Center, KERI) ;
  • Seong, K.C. (Superconductivity Research Center, KERI) ;
  • Kim, S.H. (Department of Electrical Engineering, Gyeongsang National University and Engineering Research Institute)
  • Received : 2011.04.04
  • Accepted : 2011.05.18
  • Published : 2011.05.31
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Abstract

Superconducting magnetic energy storage (SMES) has attracted a great deal of interest from the viewpoint of energy saving. The magnet of conduction-cooled high temperature superconducting (HTS) SMES is cooled down by a cryocooler. One of the most important problems to be assured the protection of magnet and cryocooler is breakdown at cryogenic temperature. In this study, we investigated insulation materials such as Kapton, Aluminum Nitride(AIN), Alumina($Al_2O_3$), glass fiber reinforced plastics(GFRP) and vacuum in cryogenic temperature. Also, we analyzed statistically the Weibull distribution of breakdown voltage.

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References

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