Abstract
A resistive switching superconducting fault current limiter (SFCL) for DC networks with a nominal voltage of 3.5 kV and a nominal current of 2 kA was developed, produced, and tested. The SFCL has two main units—an assembly of superconducting modules and a high-speed vacuum circuit breaker. The assembly of superconducting modules consists of nine (3 × 3) parallel–series connected modules. Each module contains four parallel-connected 2G high-temperature superconducting (HTS) tapes. The results of SFCL tests in the short-circuit emulation mode with a maximum current rise rate of 1300 A/ms are presented. The SFCL is capable of limiting the current at a level of 7 kA and break it 8 ms after the current-limiting mode begins. The average temperature of HTS tapes during the current-limiting mode increases to 210 K. After the current is interrupted, the superconductivity recovery time does not exceed 1 s.
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Original Russian Text © L.M. Fisher, D.F. Alferov, M.R. Akhmetgareev, A.I. Budovskii, D.V. Evsin, I.F. Voloshin, A.V. Kalinov, 2015, published in Yadernaya Fizika i Inzhiniring, 2015, Vol. 6, Nos. 11–12, pp. 553–561.
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Fisher, L.M., Alferov, D.F., Akhmetgareev, M.R. et al. A superconducting direct-current limiter with a power of up to 8 MVA. Phys. Atom. Nuclei 79, 1577–1584 (2016). https://doi.org/10.1134/S1063778816140088
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DOI: https://doi.org/10.1134/S1063778816140088