Design of PID-PSS and SVC in a multi-machine system for damping of power system oscillations using Genetic Algorithm

Abstract

Low frequency power system oscillations are damped with the help of conventional lead-lag Power System Stabilizer (PSS) by generating supplementary control signal for the excitation system. The primary function of Static Var Compensator (SVC) is to provide voltage control of long transmission lines. It can be utilized to damp power system oscillations. This paper presents robust tuning of Proportional Integral Derivative Power System Stabilizer (PID-PSS) and Static Var Compensator (SVC) using Genetic Algorithm in multi machine power systems. The placement of PSS is determined with the help of Participation Factors. The placement of SVC is found by applying Residue method. The performance of the controllers has been checked using both eigenvalue analysis and time domain simulation on 4-machine, 10 bus, two area system. The proposed controller is compared with conventional Power System Stabilizer.