Enhancement of dynamic stability of power system by optimal STATCOM control action

Abstract

A STATCOM based damping action has been proposed for small signal stability enhancement of power system. An auxiliary lead-lag control action based on STATCOM has been employed here to damp power system oscillation. The control action variables are optimized by a simplified Grey Wolf Optimizer algorithm. Step perturbation of input mechanical power and reference voltages are executed and ITAE based objective function considered for optimization problem. Pertained to disturbances the dynamic stability has been found to be much improved by proposed action, in contrast with PSO and GWO algorithm.