초록 close

- We have investigated the quench behavior of the series connection of resistive type superconducting fault current limiter (SFCL) components based on YBCO films. Equal shunt resistors Rs across individual SFCL components successfully produced simultaneous quenches for 5 components in series, resulting in equal application of voltage to all components. If the two components having the highest and the lowest critical currents (Ic) quench safely, others quench altogether. The highest shunt resistance is to guarantee the safe quenches of all components, leading to the equal voltage applications within the first half cycle after a fault in the short circuit test. The highest Rs was found to be 28 [Ω] for the components in the given quench environment. Considering the safe quenches and protection coordination, the optimal Rs was suggested to be approximately a half of the highest Rs,, allowing wide selection of Rs and Ic's. This design provides a practical way of connecting small SFCL components in series for high voltage application.