REAL-CODED GENETIC ALGORITHM FOR ROBUST COORDINATED DESIGN OF EXCITATION AND SSSC-BASED CONTROLLER

Abstract

Power system stability enhancement via robust coordinated design of a power system stabilizer (PSS) and a static synchronous series compensator (SSSC)-based controller is thoroughly investigated in this paper. The coordination among the proposed damping stabilizers and the SSSC internal injected voltage regulator and dc voltage regulator has also taken into consideration. The coordinated design problem is formulated as an optimization problem with a time-domain simulation-based objective function and real-coded genetic algorithm (RCGA) is employed to search for optimal controller parameters. The proposed stabilizers are tested on a weakly connected power system with different disturbances. Simulation results are presented to show the effectiveness and robustness of the proposed control schemes over a wide range of loading condition and disturbances. The proposed design approach is found to be robust and improves stability effectively even under small disturbance and unbalanced fault conditions.