The power system is a dynamic system. Satisfactory damping of power oscillations is an important concern when dealing with the rotor angle stability. To improve the damping of oscillations in power systems, supplementary control laws can be applied to existing devices. In this paper, a PID fuzzy controller structure and optimal PI controller of a static Var compensator (SVC) are presented and implemented on single machine infinite bus system for improving the oscillations damping. The parameters of both the PID fuzzy controller and SVC-PI controllers are tuned by the adaptive particle swarm optimization (APSO).Index Terms-Power system stabilizer, fuzzy logic control, adaptive PSO, PID controller, PI controller, static var compensator.
X. BIOGRAPHIESM. Sridhar is currently pursuing PhD in the department of electrical engineering, AU College of engineering, Andhra University, Visakhapatnam-530003, AP, India. His research interests include power system dynamics and stability, voltage stability and FACTS applications.K. Vaisakh is currently working as a professor in the department of electrical engineering, AU College of engineering, Andhra University, Visakhapatnam-530003, AP, India.His research interests include power system operation and control, power system stability, and soft computing techniques.K. S. Linga Murthy is currently working as a professor in the department of electrical engineering, AU college of engineering, Andhra University, Visakhapatnam-530003,AP,India. His research interests include economic power dispatch, power system optimal operation and control.
