The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
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Analysis on the Improvement of Power Capacity Increase in the Transformer-Type SFCL with Neutral Lines

중성선을 갖는 변압기형 초전도 한류기의 용량증대 개선 연구

  • 조용선 (조선대 공대 전기공학과) ;
  • 최효상 (조선대 공대 전기공학과) ;
  • 김덕구 (한국폴리텍Ⅰ대학 제주캠퍼스 신재생에너지학과) ;
  • 고성필 (한국폴리텍 I 대학 제주캠퍼스 신재생에너지학과)
  • Received : 2011.04.08
  • Accepted : 2011.05.16
  • Published : 2011.07.01
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Abstract

The increase of power capacity in the superconducting fault current limiter (SFCL) is essential for application into the power grid. To achieve this, when superconducting units were connected in series and parallel, the unbalanced quenching characteristics between superconducting units generated by different critical current behavior should be improved. In the transformer-type SFCL, the superconducting units connected in series could be simultaneously quenched by the connection of neutral lines between secondary coils and superconducting units. From this the consumed power in superconducting units was equally distributed. In addition, the more the turn ratio of the transformer was reduced, the more consumed power in the superconducting units was reduced by the decrease of the induction voltage generated in the superconducting units. From those results, the transformer-type SFCL using neutral lines could increase the power capacity of the SFCL by the equal power division into the superconducting units.

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References

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