Optimal Robust Control Scheme to Enhance Power System Oscillations Damping via STATCOM

Static Synchronous Compensator (STATCOM) is one of the most effective Flexible AC Transmission Systems (FACTS) devices, which is often modeled as a controllable reactive current source for voltage control and power system stability enhancement. This paper proposes a novel robust control scheme for a Single Machine Infinite Bus (SMIB) system connected to a STATCOM. The proposed scheme has been introduced in a multi-objective optimization framework. Also, three control systems are applied to improve the speed and voltage oscillations damping and guarantee the power system stability. The proposed model is carried out on each of these control systems to adjust the coefficients of their controllers. In the methodology phase, a modified version of the non-domination based genetic algorithm (NSGAII) is first used to find Pareto optimal solution and then the Programming Technique for Multidimensional Analysis of Preference (LINMAP) method is applied to reach the most preferred solution. Finally, by simulating the proposed model on the proposed control systems, their performance is investigated on dynamic stability and oscillations damping, and the efficiency of the proposed model is approved.