Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Analysis on Current Limiting and Magnetizing Characteristics Due to Winding Locations of Superconducting Fault Current Limiter Using E-I Core

E-I철심을 이용한 변압기형 초전도한류기의 권선 위치에 따른 전류제한 및 자화특성 분석

  • Kim, Bo-Hee (School of Electrical Engineering, Soongsil University) ;
  • Choi, Sang-Jae (School of Electrical Engineering, Soongsil University) ;
  • Lim, Sung-Hun (School of Electrical Engineering, Soongsil University)
  • 김보희 (숭실대학교 전기공학부) ;
  • 최상재 (숭실대학교 전기공학부) ;
  • 임성훈 (숭실대학교 전기공학부)
  • Received : 2016.09.05
  • Accepted : 2016.09.19
  • Published : 2017.02.01
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Abstract

This paper compared current limiting characteristics of superconducting fault current limiter (SFCL) using E-I core due to the location of windings. Since E-I core has three legs and two magnetic paths, the current limiting characteristics of SFCL were expected to be affected by the installation location of windings, either center leg or right/left leg. To analyze its characteristics, the electrical equivalent circuit of the SFCL were derived and the electromagnetic analysis for the SFCL with the designed structure were performed. From the short-circuit tests, the hysteresis curve and the voltage-current trajectory of the SFCL due to the installation location of windings were extracted and compared each other. The SFCL with windings in the center leg of E-I core was shown to be larger magnetizing inductance compared to the one with windings in the right or left leg of E-I, which was analyzed from the hysteresis curve. In addition, larger decreased fault current right after the fault occurrence in the SFCL with windings in the center leg of E-I core was confirmed than the SFCL with windings in the right or left leg of E-I.

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References

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