Effects of Lamination Thickness on Recovery Characteristics of a Variable Resistance SFCL

Resistive type superconducting fault current limiter (R-SFCL) can be used to suppress the fault current with low loss in normal conditions and fast response time in fault conditions. To meet the demand of reclosing, the fast recovery is required. However, the requirements of current limiting and recovery are contradictory in superconducting tape. To meet faster recovery in a variable resistance SFCL (VR-SFCL), superconducting tape branches with different layer parameters are used in the flowing branch. The effects of the copper and SS 316L thickness on the current limiting and recovery characteristics of the VR-SFCL are investigated through experiment. Results show that with the same critical current and room temperature resistance, the flowing branch of VR-SFCL with thicker SS 316L and thinner copper can recover faster with close current limiting ratio. The results can be helpful for the superconducting tape selection in VR-SFCL.