Design and operation of a protection system for transformers with superconducting windings

F. van Overbeeke, K. Oordt, L.J.M. van de Klundert

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    Abstract

    Power transformers with superconducting windings need a protection system to prevent damage to the low-loss superconducting winding by an abnormally high current. The generally accepted protection technique which uses auxiliary coils has been analysed using a network representation. The current distribution between main and auxiliary coil is expressed in terms of geometrical parameters. Experimental data on current transfer and main coil recovery in a test transformer are presented and a method of obtaining a very low auxiliary coil current is suggested.
    Original languageEnglish
    Pages (from-to)687-694
    JournalCryogenics
    Volume25
    Issue number12
    DOIs
    Publication statusPublished - 1985

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