Influences of the Resistive SFCL on the Incremental Power Frequency Relay of Transmission Lines

The superconducting fault-current limiter (SFCL) has been effective in coping with large fault currents and is expected to be largely applicated in the power system to solve the problem of increasing fault-current level in power grid nowadays. However, the coordination between SFCLs and traditional power system devices such as protective relaying has not been researched enough. This paper studies the influences of the resistive-type SFCL on the incremental power frequency relay of the transmission lines. The resistive SFCL is simulated by using thermal-electric analog method. A model of a 220-kV transmission system with the incremental power frequency relay element was built and simulated with the SIMULINK MATLAB software. Three compensation methods to eliminate the negative effects of the integration of SFCL are proposed and compared. Finally, numerical simulation tests have demonstrated the correctness and validity of theoretical analyses

Influences of SFCLs on the incremental power frequency relay of transmission line

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

Preface

The 14th European Conference on Applied Superconductivity (EUCAS 2019) was held in Glasgow, UK from the 1st to the 5th September 2019. The conference was attended by over 1000 delegates from around the world, drawn from both academia and industry. The conference programme covered the latest research and industrial developments in all areas of applied superconductivity including superconducting electronics, large-scale applications and superconducting materials