변압기형 초전도 한류기의 퀜치특성에 대한 중성선의 영향

In the transformer-type superconducting fault current limiter (SFCL), the neutral line connects the superconducting units with the secondary windings. The fault current limiting characteristics of the three-phase transformer-type SFCL with a neutral line were analyzed. In the case of the single line-to-ground fault, about 90% of the fault current on the faulted phase was limited. However, in the case of a double line-to-ground fault, the flux from the faulted-phase winding interlinked with the other windings on the faulted and sound phases to create an inductive current, and limited about 70% of the faulted current.