Design of fuzzy logic controller for firing angle of TCSC using real-type tabu search

This paper describes the application of fuzzy logic controller (FLC) to thyristor controlled series capacitor (TCSC) which can have significant impact on power system dynamics. The function of the FLC is to control the firing angle of the TCSC. We tune the scaling factors of the FLC using real-type tabu search (RTS). The proposed FLC is used for damping the low frequency oscillations caused by disturbances such as the sudden changes of small or large loads or the outages in the generators or transmission lines. To evaluate the usefulness of the proposed FLC, we perform the computer simulation for single-machine infinite system. The response of FLC is compared with that of PD controller optimized using real-type tabu search. The simulation results that the FLC shows the better control performance than PD controller.