Produção Nacional
Revisado por pares
Fault Current Limiter Using Transformer and Modular Device of YBCO Coated Conductor
2013; IEEE Council on Superconductivity; Volume: 23; Issue: 3 Linguagem: Inglês
10.1109/tasc.2013.2248411
ISSN1558-2515
AutoresC.A. Baldan, J.S. Lamas, André A. Bernardes, C.Y. Shigue, Ernesto Ruppert,
Tópico(s)High-Voltage Power Transmission Systems
ResumoIn 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 ( superconducting 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.
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