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Repetitive operation of three-phase superconducting fault current limiter in a model power system

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7 Author(s)
Shirai, Y. ; Dept. of Energy Sci. & Technol., Kyoto Univ., Japan ; Mochida, A. ; Morimoto, T. ; Shiotsu, M.
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Superconducting fault current limiters (SCFCLs) are expected to improve reliability and stability of power systems. To introduce an SCFCL to power systems, the repetitive operation at the severe continuous faults is one of the important function. The recovery time of the proposed 3-phase FCL was confirmed experimentally to be sufficiently short for the repetitive operation. This paper shows the experimental results and discussion on the repetitive current limiting operation of the 3-phase SCFCL, which was demonstrated in a model power system. The test condition was that the fault line is open at the fault within 100 ms and is re-closed within 930 ms, but the fault is not cleared during the interval while the fault line is open. It was confirmed that the SCFCL started to limit the fault current immediate after the fault and recover to the stand-by mode during the interval, and limited the fault current again at the re-closure without any degradation of the trigger current level and the limiting impedance.

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Applied Superconductivity, IEEE Transactions on  (Volume:15 ,  Issue: 2 )