Progress in Superconductivity and Cryogenics (한국초전도ㆍ저온공학회논문지)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
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Quench Analysis and Operational Characteristics of the Quench Detection System for the KSTAR PF Superconducting Coils

펄스전류 운전에 따른 KSTAR PF 초전도자석의 퀜치 분석 및 퀜치 검출 시스템 운전 특성

  • 추용 (국가핵융합 연구소) ;
  • 요네가와 (국가핵융합 연구소) ;
  • 김영옥 (국가핵융합 연구소 장치운전팀) ;
  • 이현정 (국가핵융합 연구소 KSTAR 운전연구팀) ;
  • 박갑래 (국가핵융합 연구소 KSTAR 운전연구팀) ;
  • 오영국 (국가핵융합 연구소)
  • Published : 2009.09.30
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Abstract

The quench detection system of the KSTAR (Korea Superconducting Tokamak Advanced Research) primarily uses the resistive voltage measurement due to a quench. This method is to detect the resistive voltage generated by a quench, which is continuously maintained above the preset voltage threshold for a given holding time. As the KSTAR PF (Poloidal Field) coils are operated in the pulse current mode, the large inductive voltages are generated. Therefore the voltage threshold and the quench holding time should be determined by considering both the inductive voltages measured during the operation, and the maximum conductor temperature rise through the quench analysis. In this paper, the compensation methods for minimizing the inductive voltages are presented for the KSTAR PF coils. The quench hot spot analysis of the PF coils was carried out by the analytical and numerical methods for determining the proper values of the quench voltage threshold and the allowable quench protection delay time.

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References

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