이중철심을 이용한 병렬연결된 2개의 코일을 갖는 자속구속형 초전도한류기의 전압강하 억제특성

초록

In this paper, the flux-lock type superconducting fault current limiter (SFCL), which is comprised of three windings, two high-TC superconducting (HTSC) elements and dual iron cores, was proposed and the short-circuit tests of the SFCL were performed. From the short-circuit tests, the voltage sag suppressing characteristics of the proposed SFCL as well as the fault current limiting characteristics due to the winding direction of two parallel connected windings were compared. The suggested flux-lock type SFCL, which two parallel connected windings comprising the SFCL were designed to be the additive polarity winding, was confirmed to be more effective than the SFCL designed to be subtractive polarity winding from the voltage sag suppressing operation. On the other hand, from its fault current limiting operation, the SFCL designed with the subtractive polarity winding for two parallel connected windings could be found that a little more superior than the SFCL designed with the additive polarity winding.

키워드