Power System Stability Improvement by TCSC Controller Employing a Multi - Objective Genetic Algorithm Approach

Algorithm (GA) approach to tune the parameters of a Thyristor Controlled Series Compensator (TCSC), for power system stability improvement. Pareto method type of selection is used in the present multi-objective GA approach, which gives a set of solutions from which the best one can be chosen according to the requirements and needs. The design problem of TCSC controller is formulated as a parameter-constrained, multi objective optimization problem, and the parameters of the TCSC controller are optimally tuned. By minimizing the time-domain based multi objective function, in which the deviations in the oscillatory rotor angle, rotor speed and accelerating power of the generator are involved, stability performance of the system is improved. The proposed controllers are tested on a weakly connected power system subjected to a disturbance. Simulations are executed for an example power system to analyze the effectiveness and robustness of the proposed controllers.