Abstract
Superconducting fault current limiter (SFCL) is able to efficiently solve the short-circuit problems occurred in the modern power system. In this paper, the simulation analysis and experimental tests of a small-scale flux-coupling type SFCL (FC-SFCL) are carried out. In regard to the developed 400 V/20 A small-scale prototype of the FC-SFCL, it is composed of two coaxial HTS windings carrying current in reverse directions, two metal oxide varistors, and a controlled switch. The parameter design of the FC-SFCL prototype is presented. Based on the simulations, the design scheme's effectiveness can be confirmed from the higher current-limiting ratio, and the SFCL has lower average ac losses under normal condition. The experimental results are in accord with the simulation ones, and the current-limiting characteristics of the FC-SFCL can be well verified.
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