Progress in Superconductivity and Cryogenics (한국초전도ㆍ저온공학회논문지)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
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Characteristics Analysis of a Small Scale Persistent Current Switch System by using Coated Conductor

Coated Conductor를 이용한 소용량 영구전류스위치 시스템의 특성 해석

  • 김영식 (연세대 대학원 전기전자공학과) ;
  • 윤용수 (안산공과대학 전기과) ;
  • 양성은 (연세대 대학원 전기전자공학과) ;
  • 박동근 (연세대 대학원 전기전자공학과) ;
  • 안민철 (기초전력연구원) ;
  • 고태국 (연세대 공과대 전기전자공학과)
  • Published : 2007.03.31
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Abstract

This paper presents characteristics analysis of persistent current switch(PCS) system on a small scale by using YBCO coated conductor(CC). A high temperature superconductor(HTS) PCS system mainly consists of a PCS, a HTS magnet load and a magnet power supply(MPS). To design the optimal heater triggering switch. the three-dimensional heat conduction model was analyzed by finite element method(FEM). The electrical equivalent model considering the n-value of CC was applied to analyze current decay during persistent current mode. In the experiment and simulation, the heater was applied with a current of 0.43A and the current was ramped up to 10A and 20A with 0.2A/s. Finally, experimental results of the HTS PCS system have been compared with the theoretical results. It has been concluded that flux creep can not influence the results because the operating current was 40% of critical current and optimal sequential operation of the PCS system is indispensable to enhance its performance.

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References

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