Experimental study of a transformer with superconducting elements for fault current limitation and energy redistribution

Details Experimental study of a transformer with superconducting elements for fault current limitation and energy redistribution Experimental study of a transformer with superconducting elements for fault current limitation and energy redistribution

2005-04-19

arxiv.org/abs/cond-mat/0504480v1

Physics

Condensed Matter

Superconductivity

15 pages incl. 4 figures. Submitted to "Cryogenics"

Scientific paper

10.1016/j.cryogenics.2005.06.004

Numerous proposed and developed superconducting fault current limiters and self-limiting transformers limit successfully fault currents but do not provide uninterrupted supplying of consumers. A design investigated in the work combines the functions of a conventional transformer with the functions of fast energy redistribution and fault protection. The device constitutes a transformer containing an additional high-temperature superconducting (HTS) coil short-circuited by a thin film HTS switching element. Fault current limitation and redistribution of the power flow to a standby line are achieved as a result of a fast transition of the superconducting switching element from the superconducting into the normal state. Transient and steady-state characteristics were experimentally investigated. A mathematical model of the device operation was proposed, and the calculated results were found to be in good agreement with the experimental data. The application field and basic requirements to such devices were discussed and it was shown that the proposed device meets these requirements.

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