A system study on superconducting fault current limiting transformer (SFCLT) with the functions of fault current suppression and system stability improvement

In this paper, the authors propose a “superconducting fault current limiting transformer (SFCLT)”, a superconducting transformer equipped with the function of a superconducting fault current limiter. They discussed the operating characteristics of SFCLT introduced into a simplified power transmission model system. Fault current, transient stability, overvoltage and thermal characteristics of SFCLT were analyzed in the model system. It was finally revealed that SFCLT could satisfactorily bring about the functions of fault current suppression and power system stability improvement