Thermal Instability and Current-Voltage Scaling in Superconducting Fault Current LimitersReport as inadecuate




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1 DMSM - Department of Materials Science and Metallurgy Cambridge University 2 Department of Engineering Cambridge 3 IRC in Superconductivity - IRC in Superconductivity

Abstract : We have developed a computer model for the simulation of resistive superconducting fault current limiters in three dimensions. The program calculates the electromagnetic and thermal response of a superconductor to a time-dependent overload voltage, with different possible cooling conditions for the surfaces, and locally variable superconducting and thermal properties. We find that the cryogen boil-off parameters critically influence the stability of a limiter. The recovery time after a fault increases strongly with thickness. Above a critical thickness, the temperature is unstable even for a small applied AC voltage. The maximum voltage and maximum current during a short fault are correlated by a simple exponential law.

Keywords : Superconducting Fault Current Limiter thermal stability quench





Author: Bernhard Zeimetz - K. Tadinada - D. E. Eves - T. A. Coombs - J. E. Evetts - A. M. Campbell -

Source: https://hal.archives-ouvertes.fr/



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