Improving stability of Four Area Power System Using Modified Tuning Technique with Genetic Algorithm

This paper presents the improvement of the load frequency control (LFC) of multi area power system using PID controller and PID controller with PSS (PID-PSS Controllers). And compare the frequency response for a four area interconnected power system for both the controller model. In Automatic Generation Control (AGC), a small change in load demand may affect the system frequency; it would either increase or decrease. And variation in system frequency introduces a major effect on frequency dependent load. In this study a controller parameter can be adjusted along the system dynamic area via tuning itself through Genetic Algorithms (GA) optimization technique under Integral time weighted absolute value error (ITAE) Criterion. The simulation results for the proposed model, the frequency response are compared and the effects of both the controllers are shown over the effectiveness in the power system oscillations stabilization.