The superconducting fault current Iimiter (SFCL) has been effective in coping with large fault currents and is expected to be widely used in the electrical power system. In order to maintain reliable operation of the transmission system with a SFCL, the influences of SFCLs on the incremental power frequency relay (IPFR) of the transmission lines are discussed in detail. In this paper a model of the real 220-kV transmission system with a resistive SFCL was built using Simulink/MATLAB software. Finally, numerical simulation tests have demonstrated the correctness and validity of theoretical analyses
