Abstract
The increase in capacities of power transmission and in fault currents of the related grid machinery has resulted in the development of various types of superconducting fault current limiters (SFCLs). One proposed solution to increase the voltage and current ratings of SFCL for application into real power system is the method to use the magnetically coupled coils or transformer. In this paper, we propose a new resistive type SFCL using flux linkage. The proposed SFCL consists of an YBCO thin film and a reactor, which is two coils wound in series on the same iron core. The operational characteristics were analyzed by using the equivalent circuit of the suggested SFCL and the fault current limiting characteristics were investigated through experiments. Through the analysis, it was shown that the limited fault current and the resistance of the high-TC superconducting (HTSC) element could be adjusted by ranging two coils' inductances and that this new resistive type SFCL could increase the short-circuit capacity of the SFCL. (© 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
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