Abstract
In this research, the current-limiting and recovery characteristics of a flux-lock-type superconducting fault current limiter (SFCL) with two adjustable operational currents were analyzed. The flux-lock-type SFCL with two adjustable operational currents, which consists of two magneticallycoupled coils, two high-TC superconducting (HTSC) modules connected in parallel, and an inserting resistance connected in series with one of the two HTSC modules, can limit the fault current with two operational currents by quench generation in either one HTSC module for a lower fault current or two HTSC modules for a higher fault current directly after the fault occurrence. To verify the current-limiting operation of this type SFCL, we constructed the simulated power distribution system protected by the SFCL, and we executed the short-circuit tests in the fault locations with both the lower and the higher fault currents. Through an analysis of the experimental results, effective current limiting operations of the flux-lock-type SFCL could be confirmed.
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