Load Frequency Control of an Inter Connected Power System Using PSO Based PID Controller

The objective of this paper is to design an optimum controller for an interconnected power system based on conventional Proportional-Integral-Derivative (PID) controller and Particle Swarm Optimization (PSO) optimization technique for better Load Frequency Control (LFC) in the event of changing load. This proposed PID-PSO controller provides better solutions in terms of rising time, settling time, minimum overshoot and tie-line error. In this proposed simulation model, two power areas with multi-source generation units are connected via a tie-line connection. Parameters of the PID controller are tuned using the PSO algorithm for optimum output. The system was designed and simulated using MATLAB software using SIMULINK. The results are presented in terms of frequency deviation, tie line error, and settling time.