Design and Test of 10 kV/400 A Flux-Coupling-Type Superconducting Fault Current Limiting Module

The flux-coupling-type superconducting fault current limiter (FC-SFCL) is suggested to suppress the surge current in voltage sourced converter based HVdc (VSC-HVdc) power systems. One 10 kV/400 A FC-SFCL module with two branches is designed and tested. For the FC-SFCL module, the two branches could use the same or different YBCO tapes. Furthermore, the electromagnetic analysis and parameter calculation of the module are performed. In order to study the current-limiting performance of the FC-SFCL under the rapid change of fault current, a dynamic simulation model is established. Finally, the transient properties of FC-SFCL module are simulated and tested. According to the measurement results, the maximum impact current could be limited from 12 kA to 6264 A, and the largest resistance of the SFCL module is about 1.5 Ω when the dc impact voltage is 10 kV, which is close to the simulation results.