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3-phase current-source SMES-UPS based on toroidal field superconducting coils (TFSC) is introduced in this paper, which serves for the exciting power supply (EPS) for TFSC when the power grid is in order, as well as for uninterrupted power supply (UPS) for the cryogenic and vacuum system once the deep voltage sag or other grid faults are detected. In the case of former, by controlling active and reactive...
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