Progress in Superconductivity and Cryogenics (한국초전도ㆍ저온공학회논문지)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
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Experimental Analysis of Superconducting Fault Current Limiter Wound with Two Different HTS wires in Parallel

  • Kim, Ji-Tae (Department of Electronic Engineering, Kyungwon University) ;
  • Jang, Jae-Young (Department of Electrical and Electronic Engineering, Yonsei University) ;
  • Park, Dong-Keun (Department of Electrical and Electronic Engineering, Yonsei University) ;
  • Chang, Ki-Sung (Department of Electrical and Electronic Engineering, Yonsei University) ;
  • Kim, Young-Jae (Department of Electrical and Electronic Engineering, Yonsei University) ;
  • Ko, Tae-Kuk (Department of Electrical and Electronic Engineering, Yonsei University)
  • Published : 2008.05.31
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Abstract

Several kinds of superconducting fault current limiters (SFCLs), which reduces huge fault current, have been developing by many research groups. The SFCL has no impedance during normal operation, so it dose not give any influence to electric power system. The resistive type SFCL reduces the fault current with the impedance generated in the superconducting part of the SFCL when the fault current exceeds the critical current of SFCL. In this paper, a new type resistive SFCL made of bifilar coil wound with two different high-Tc superconducting (HTS) wires in parallel. Although a bifilar coil has theoretically no inductance, the bifilar coil made in this paper could generate inductance at fault. The specifications of the used two wires were considerably different, thus current distribution between the two HTS wire was different at fault. When the fault current exceeded the critical current of one wire in the bifilar coil, the momentary sharp increase of impedance was detected. Base on the results, a new resistive type SFCL can generate not only resistance but also inductance, which can be used to control a fault current in the future.

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References

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