Study on the Necessity for Limiting Impedance of Superconducting Fault Current Limiter Considering Protective Coordination of power distribution

배전보호협조를 고려한 초전도 한류임피던스 제한에 필요성 연구

In this paper, we study on the necessity for limiting impedance of Superconducting Fault Current Limiter(SFCL) considering protective coordination. Several countermeasures have been proposed to protect the power system effectively from the larger fault current. Among them, the SFCL has been expected as one of the most effective solutions. However, the application of SFCL into power system can cause some problems, such as non-operation of instantaneous elements, of protective coordination because of limiting fault current. So we suggest that impedance of SFCL is must limited for operation of instantaneous elements. 'This method is essential to introduce application of SFCL into power distribution system.