| Title |
Increase of the Voltage Rating of Resistive Type Superconducting Fault Current Limiter Using Equal Shunt Resistors |
| Authors |
차상도 ; 김혜림 ; 심정욱 ; 한용희 ; 현옥배 |
| Keywords |
fault current limiter ; SFCL ; shunt resistor ; R_s |
| Abstract |
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 R_s 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 (I_c) 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 R_s was found to be 28 ［Ω］ for the components in the given quench environment. Considering the safe quenches and protection coordination, the optimal R_s was suggested to be approximately a half of the highest R_s,, allowing wide selection of R_s and I_c's. This design provides a practical wav of connecting small SFCL components in series for high voltage application. |