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MgB₂-based superconductors for fault current limiters

Sokolovsky, V.; Prikhna, T.; Meerovich, V.; Eisterer, M.; Goldacker, W.; Kozyrev, A.; Weber, H. W.; Shapovalov, A.; Sverdun, V.; Moshchil, V.

A promising solution of the fault current problem in power systems is the application of fast-operating nonlinear superconducting fault current limiters (SFCLs) with the capability of rapidly increasing their impedance, and thus limiting high fault currents. We report the results of experiments with models of inductive (transformer type) SFCLs based on the ring-shaped bulk MgB2 prepared under high quasihydrostatic pressure (2 GPa) and by hot pressing technique (30 MPa). It was shown that the SFCLs meet the main requirements to fault current limiters: they possess low impedance in the nominal regime of the protected circuit and can fast increase their impedance limiting both the transient and the steady-state fault currents. The study of quenching currents of MgB2 rings (SFCL activation current) and AC losses in the rings shows that the quenching current density and critical current density determined from AC losses can be 10-20 times less than the critical current determined from the magnetization experiments.

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Verlagsausgabe §
DOI: 10.5445/IR/1000069140
Veröffentlicht am 06.03.2018
DOI: 10.1088/1757-899X/171/1/012144
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Technische Physik (ITEP)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2017
Sprache Englisch
Identifikator ISSN: 1757-8981, 1757-899X
KITopen-ID: 1000069140
HGF-Programm 37.06.02 (POF III, LK 01)
New Power Network Technology
Erschienen in IOP conference series / Materials science and engineering 26th International Cryogenic Engineering Conference, ICEC 2016 and International Cryogenic Materials Conference 2016, ICMC 2016; Manekshaw Convention CentreNew Delhi; India; 7 March 2016 through 11 March 2016
Band 171
Heft 1
Seiten Art.Nr: 012144
Nachgewiesen in Scopus
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