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The Transactions P of the Korean Institute of Electrical Engineers

Korean Journal of Air-Conditioning and Refrigeration Engineering

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Title	Analysis on Voltage Sag in Power Distribution System according to SFCL's Impedance for Protective Coordination with Large Transformer
Authors	김진석(Kim, Jin-Seok) ; 문종필(Moon, Jong-Fil)
DOI	https://doi.org/10.5370/KIEEP.2014.63.4.312
Page	pp.312-316
ISSN	1229-800X
Keywords	Superconducting fault current limiter ; Power distribution system ; Large transformer ; Protective coordination ; Voltage quality
Abstract	In this paper, a voltage sag is analyzed in case of superconducting fault current limiter (SFCL) installed in power distribution system where replaces the main power transformer to large one to meet the power demand. First, the power system is configurated to analyze the operation characteristics of the protective relay with replacement of the main transformer and application of the SFCL. Next, the method to meet the protection coordination is analyzed with large transformer using PSCAD/EMTDC. Finally, the bus voltage is investigated according to the impedance of both main transformer and SFCL in case that the SFCL is applied into feeder.

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