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ENSYSTROB—Resistive Fault Current Limiter Based on Coated Conductors for Medium Voltage Application

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9 Author(s)
Elschner, S. ; Karlsruhe Inst. of Technol. (KIT), Karlsruhe, Germany ; Kudymow, A. ; Fink, S. ; Goldacker, W.
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A new German government funded project for a resistive fault current limiter has started in September 2009 (ENSYSTROB) and is presented. The consortium includes partners from industry, research centers and utilities. It aims the construction of a 3-phase medium voltage current limiter (12 kV, 800 A) for the protection of the domestic supply in a power plant. A special feature of this application is the presence of large in-rush currents (4100 Ap for 50 ms, 1800 A for 15 s). The superconducting components are bifilar pancake coils consisting of pairs of YBCO-tapes in face to back configuration. Successful limitation experiments on prototype components with prospective currents in the whole range are shown. Also the stability with respect to high voltage could be demonstrated. The AC-losses under normal operation are shown, by simulation and experiment, to be smaller than the heat input of the current leads. The current limiting components are compared with similar elements based on BSCCO 2212 bulk material (Nexans SuperConductors).

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Applied Superconductivity, IEEE Transactions on  (Volume:21 ,  Issue: 3 )