Progress in Superconductivity and Cryogenics (한국초전도ㆍ저온공학회논문지)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
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A study on the effective fault current limiting characteristics of stacked coated conductors with stainless steel stabilizer

스테인리스 스틸 안정화재를 가진 coated conductor의 적층 유무에 따른 효과적인 사고전류 제한을 위한 연구

  • 나진배 (연세대 대학원 전기전자공학과) ;
  • 안민철 (기초전력연구원) ;
  • 김민재 (연세대 대학원 전기전자공학과) ;
  • 김영재 (연세대 대학원 전기전자공학과) ;
  • 양성은 (연세대 대학원 전기전자공학과) ;
  • 박동근 (연세대 대학원 전기전자공학과) ;
  • 김호민 (한국전기연구원) ;
  • 석복렬 (현대중공업 기계전기연구소) ;
  • 고태국 (연세대 대학원 전기전자공학과)
  • Published : 2007.03.31
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Abstract

Coated conductor(CC) is recently in actively progress for the research and development, and its can be used various stabilizer lot the specific requirements for each application. Among various superconducting applications, coated conductor applied to superconducting fault current limiters(SFCLS) bypasses fault current to its stabilizer, where the surge is abruptly reduced ; thus, stainless steel, which has large resistivity can be a suitable stabilizer for SFCLS. Despite high n-value of the YBCO, CC stabilized with stainless steel did not effectively limit the first peak fault current. In the short circuit test results of AMSC's 344S, a half period delay was observed between the fault and the generation of resistance(60Hz). In this paper, we performed short-circuit experiments with stacked and unstacked CC and compared the test results to analyze effective fault current limiting characteristics. we compared time of the generated resistance as the fault current limiting characteristics and made the samples one is the stacked CC and the other is unstacked CC. These samples were used equal numbers of pieces of CC. In addition, comparison and analysis was made for the stacked structure by measuring fault current limiting characteristics with respect to thermal insulation by impregnating with epoxy resin.

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References

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