이중철심을 이용한 직렬연결형 초전도한류기의 이중퀜치 동작특성

초록

In this paper, we proposed a flux-lock type superconducting fault current limiter (SFCL) with series connection of two coils in order to support the double quench function in relation to the intensity of fault currents at an early stage of a failure. Through the short-circuit simulation, we analyzed the transient fault current limiting characteristics of a flux-lock type SFCL with series connection of two coils and the instantaneous power load characteristics of the SFCL and superconducting elements. In case that the SFCL turns’ ratio between the primary and secondary windings is 0.5, the instantaneous power peak values in both the superconducting elements and the SFCL were confirmed to be much larger rather than 0.25 during the fault generation half period. Also, the peak fault current limiting operation of the SFCL and the sequential quench characteristics of superconducting elements 1 and 2, in case that the turns’ ratio of coils 1 and 2 is a 0.5, were shown to be more excellent than the case with 0.25.

키워드