Progress in Superconductivity and Cryogenics (한국초전도ㆍ저온공학회논문지)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
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A Study on AC loss Characteristics of Asymmetric non-inductive coils with Combination of Superconducting wires

초전도 선재 조합에 따른 비대칭 무유도성 코일의 교류 손실 특성 연구

  • 김진섭 (연세대 대학원 전기공학과) ;
  • 황영진 (연세대 대학원 전기공학과) ;
  • 나진배 (연세대 대학원 전기공학과) ;
  • 최석진 (연세대 대학원 전기공학과) ;
  • 김영재 (연세대 대학원 전기공학과) ;
  • 이지호 (연세대 대학원 전기공학과) ;
  • 이우승 (연세대 대학원 전기공학과) ;
  • 장기성 (연세대 대학원 전기공학과) ;
  • 고태국 (연세대 공과대학 전기전자공학부)
  • Received : 2010.10.08
  • Accepted : 2011.03.16
  • Published : 2011.03.31
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Abstract

A hybrid superconducting fault current limiter (SFCL) with fast switch had been previously suggested by our research group. To make a hybrid SFCL, different superconducting wires were wound two pancake coils so that two pancake coils had asymmetric configuration. The impedance of the asymmetric non-inductive coils are zero with applied normal current. However during the fault. currents were distributed unequally into the two pancake coils because each superconducting wires have different electrical characteristics. This unequal distribution of current causes effective magnetic flux which generate repulsive force. Fast switch was thus opened by the force applied to the aluminum plate which consists of SFCL. In this paper, the AC loss characteristics of the asymmetric non-inductive coils with combinations of superconducting wires were studied and calculated by related experiments and finite element method (FEM) simulation. From these results, we suggested the appropriate combination of two superconducting wires to be used for the asymmetric non-inductive coils.

Keywords

Acknowledgement

Supported by : 한국과학재단

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