Combined operation of SFCL and optimal reclosing of circuit breakers for power system transient stability enhancement

Abstract

This paper proposes the coordinated operation of optimal reclosing of circuit breakers and superconducting fault current limiter (SFCL) for enhancing the transient stability of a multi-machine power system. The transient stability performance of the combined operation of optimal reclosing of circuit breakers and SFCL is compared with that of the combined operation of conventional reclosing of circuit breakers and SFCL. The total kinetic energy (TKE) of the generators in the system is used to determine the transient stability enhancement index. Simulations are performed through Matlab/Simulink software. Simulation results for both the three-line-to-ground (3LG)and single-line-to-ground (1LG) permanent faults at different points of the power system indicate that the proposed combination of optimal reclosing of circuit breakers and SFCL can enhance the transient stability of the system well. Also, the performance of the proposed method is better than that of the combined operation of conventional reclosing of circuit breakers and SFCL.