VEPSO BASED PID WITH LOW PASS FILTER FOR LFC DESIGN

This paper employs an adaptive Vector Evaluated Particle Swarm Optimization (VEPSO) algorithm to tune optimal gains of a Proportional Integral Derivative (PID) controller with low pass filter for Load Frequency Control (LFC) scheme in an interconnected power system that shift the system eigenvalues to the left of a vertical line in the s-plane. The problem of robustly tuning of practical PID based LFC design is formulated as an optimization problem according to the time domainbased objective function which is solved by the VEPSO technique that has a strong ability to find the most optimistic results. To demonstrate the effectiveness of the proposed method a two-area interconnected power system is considered as a test system under different operating conditions. The eigenvalue analysis and the nonlinear simulation results show the effectiveness of the proposed PID to damp out oscillations and work effectively over a wide range of loading conditions and system configurations.