Performance Analysis on a Flux Coupling Superconducting Fault Current Limiter (SFCL) Considering the Power Grid Integration Based on MATLAB/SIMULINK

Superconducting fault current limiter (SFCL) can reduce the capacity of the circuit breaker and lower the cost of line construction, it becomes more and more popular for the application in a high-voltage transmission line. A novel superconducting fault current limiter with bias magnetic flux is proposed by using a reactor with symmetrical double split copper windings and a non-inductive YBCO magnet which is in series to one branch winding. The models of the non-inductive superconducting element and the reactor are established based on MATLAB/SIMULINK. The performance is analyzed through the simulation of a prototype SFCL. The response speed, overvoltage and overcurrent characteristics considering the influence of different fault current are compared and the robustness of the SFCL in a power system are discussed. The simulation results validate the effectiveness of the flux coupling SFCL.