Simulation and Experimental Study of Solenoid SFCL Under DC Impact Current

As one of the most valid ways for the control and break of short-circuit current in the voltage source converter based high voltage direct current (VSC-HVdc) power systems, superconducting fault current limiter (SFCL) has received more and more attention, especially the resistive SFCL. In this paper, the simulation and experimental study of solenoid SFCL wounded by AMSC 8602 YBCO superconducting tape are carried out. The results show that the simulation using electric-thermal coupling model has certain credibility. When the initial voltage of the discharge capacitor is 1.5 kV, the fault current limiting rate of the solenoid SFCL is 33.3%. During the dc impact stage, the peak value of the voltage curve lags behind that of the impact current curve. The resistance inflection points of the solenoid SFCL are all 0.22¡. The Q-R curves of the solenoid SFCL are almost coincident under different impact conditions, indicating that the law of the resistance change with Joule heat is certain.