Coordinated Robust Control Scheme for Rotor angle and Voltage Oscillations Damping via STATCOM based on PSO

STATCOM is a controllable reactive current source applied to control reactive flow in transmission lines and compensate reactive power in power system nodes. This paper gives a novel robust control scheme for designing STATCOM controller to enhance the stability of the power grid. In order to mitigate oscillations, the coordinated controller is carried out both speed and voltage control loop. The proposed scheme is defined as an optimization problem, and the robustness criteria are used for evaluating the controller stability and performance. Also, Single Machine Infinite Bus (SMIB) system are applied to analyze the dynamic stability. The employed controller is a PID controller and its coefficients are tuned by PSO algorithm. The simulation results show that the proposed controller extremely obtains significant damping characteristics during the operation process.