Design and implementation of superconductor fault current limiter in power systems

High current levels caused by faults in power systems for various reasons create dangerous situations for the system and the elements in the system. Limitation of fault currents provides protection of the system and system components from the forcing thermal, dynamic and electromagnetic effects of these currents. Many fault current limiting methods are used in practice. Although these methods are generally different from each other in terms of working principle and structure, the common purpose of all of them is to ensure the security and reliability of the system. Thanks to fault current limiter methods, operation continuity can be achieved without any changes in the existing system. In this doctoral thesis, the types, operating principles and structures of Superconductor Fault Current Limiters (SFCL), one of the modern fault current limiting methods, are examined. In the MATLAB/Simulink program, the applicability of R-SFCL to electrical energy transmission system has been examined by modeling Resistive SFCL (R-SFCL) and its effects on the system are shown with waveforms. In addition, a sample R-SFCL design is made in the laboratory environment, and the simulated results are compared with the real data obtained by performing faults in the created experimental system. With this thesis, it has been revealed that R-SFCL will be an ideal method for transmission systems.