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Fabrication and fault test of 12 kVA class BSCCO SFCL element

12 kVA급 BSCCO 한류소자 제작 및 특성 실험

  • 오성용 (충북대학교 신소재공학과) ;
  • 임성우 (한전전력연구원 초전도그룹) ;
  • 김혜림 (한전전력연구원 초전도그룹) ;
  • 현옥배 (한전전력연구원 초전도그룹) ;
  • 장건익 (충북대학교 신소재공학과)
  • Published : 2008.03.31

Abstract

For the development of superconducting fault current limiters(SFCLs) having large current capacity, we fabricated an SFCL element that consists of Bi-2212 superconductor and Cu-Ni alloy tubes. First, Ag was plated on the surface of the Bi-2212 for the enhancement of soldering process. On the Ag-plated Bi-2212 tube, a Cu-Ni alloy tube was soldered using optimized solders and soldering conditions. The BSCCO/Cu-Ni composite was processed mechanically to have a helical shape for the improvement of the SFCL characteristics. The total current path of the SFCL element was 1330 mm long with 12 turns, and had critical current of 340 A at 77 K. Finally, we carried out the fault test using the fabricated SFCL element. It showed successful current limiting performance under the fault condition of 50 $V_{rms}$ and 5.5 kA. From the results, the rated voltage of the SFCL element was decided to be 0.4 V/cm, and the power capacity was 12 kVA at 77 K. The fabrication process of the SFCL and the fault test results will be presented.

Keywords

References

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