The Transactions of the Korean Institute of Electrical Engineers B (대한전기학회논문지:전기기기및에너지변환시스템부문B)

The Korean Institute of Electrical Engineers (대한전기학회)
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Operating Characteristics of Superconducting Fault Current Limiters Connected in Series by Shunt Resistors

직렬연결된 초전도 한류기의 분로저항에 의한 동작특성

  • 현옥배 (한전전력연구원 전력계통연구실) ;
  • 최효상 (한전전력연구원 전력계통연구실) ;
  • 김혜림 (한전전력연구원 전력계통연구실) ;
  • 임해룡 (한국 표준과학연구원 양자연구부) ;
  • 김인선 (한국 표준과학연구원 양자연구부)
  • Published : 2000.11.01
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Abstract

We fabricated resistive superconducting fault current limiters (SFCL) based on YBCO thin films grown on 2-inch diameter $Al_2O_3$ substrates. Two SFCLs with nearly identical properties were connected in series to investigate simultaneous quench. There was a slight difference in the rate of voltage increase between two SFCL units when they were operated independently. This difference resulted in significantly imbalanced power dissipation between the units. This imbalance was removed by connecting a shunt resister to an SFCL in parallel. The appropriate values of shunt resistance were 80 ${\Omega}$ at 75 $V_rms$ and 110 ${\Omega}$ at 120 $V_rms$, respectively. Increased power input at high voltages also reduced the initial imbalance in power dissipation, but with increase in film temperature to higher than 200 K.

Keywords

References

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