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Fault current limiter using transformer and modular device of YBCO coated conductor
  • Universidade de São Paulo (USP)
  • Universidade Estadual Paulista (UNESP)
  • Ghent University
  • Universidade Estadual de Campinas (UNICAMP)
In this work, we report on the evaluation of a superconducting fault current limiter (SFCL). It is consisted of a modular superconducting device combined with a short-circuited transformer with a primary copper winding connected in series to the power line and the secondary side short-circuited by the superconducting device. The basic idea is adding a magnetic component to contribute to the current limitation by the impedance reflected to the line after transition of the superconducting device. The evaluation tests were performed with a prospective current up to 2 kA, with the short-circuited transformer of 2.5 kVA, 220 V/660 V connected to a test facility of 100 kVA power capacity. The resistive SFCL using a modular superconducting device was tested without degradation for a prospective fault current of 1.8 kA, achieving the limiting factor 2.78; the voltage achieved 282 V corresponding to an electric field of 11 V/m. The test performed with the combined SFCL (xsuperconducting device + transformer) using series and toroidal transformers showed current limiting factor of 3.1 and 2 times, respectively. The test results of the combined SFCL with short-circuited transformer showed undesirable influence of the transformer impedance, resulting in reduction of the fault current level. © 2002-2011 IEEE.
Issue Date: 
IEEE Transactions on Applied Superconductivity, v. 23, n. 3, 2013.
  • Current limiting ratio
  • step up transformer
  • superconducting fault current limiter
  • YBCO coated conductor
  • Current limitation
  • Current limiting
  • Magnetic components
  • Step up transformers
  • Superconducting faultcurrent limiters (SFCL)
  • Toroidal transformers
  • Transformer impedances
  • YBCO coated conductors
  • Critical current density (superconductivity)
  • Electric fault currents
  • Electric fields
  • Electric transformer testing
  • Superconducting devices
  • Superconducting electric lines
  • Yttrium barium copper oxides
  • Superconducting fault current limiters
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Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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