하이브리드 초전도 전류제한기와 과전류계전기와의 보호협조 분석

We investigated the protective coordination between the hybrid superconducting fault current limiter (SFCL) and the over current relay (OCR) through the computer simulation using PSCAD/EMTDC. Through the PSCAD/EMTDC modeling of the hybrid SFCL, the first half cycle limiting and the first half cycle non-limiting operations of the hybrid SFCL were compared. It was confirmed that the hybrid SFCL with the first half cycle limiting operation could more delayed the trip time of the OCR than the one with the first half cycle non-limiting operation.