Transient stability enhancement by bridge type fault current limiter considering coordination with optimal reclosing of circuit breakers

This paper proposes the coordinated operation of the bridge type fault current limiter (BFCL) and optimal reclosing of circuit breakers to enhance the transient stability of a multi-machine power system. The transient stability performance of the proposed method is compared with that of the thyristor controlled series capacitor (TCSC) and the dc resistive fault current limiter (RFCL) considering the same optimal reclosing technique. The total kinetic energy (TKE) of the generators in the system is used to determine the transient stability enhancement index. Also, the critical clearing time has been presented as a stability limit. Simulations are performed by using the Matlab/Simulink software. Simulation results for both permanent and temporary faults at different points in the IEEE 30 bus power system and single-machine power system indicate that the coordinated operation of the BFCL and optimal reclosing of circuit breakers can enhance the transient stability of the system well. Also, the performance of the proposed method is better than that of the TCSC and RFCL considering the optimal reclosing technique.