Abstract: This paper proposed a PSO with the constriction factor algorithm was used to tune PID-gains for an automatic voltage regulator (AVR) system. In the proposed approach, optimal tuning of PID-gains has very significant issue to perform the target value. Thus, a proposed algorithm has been used to get a better performance. The superiority of the PSO-PID controller is demonstrated through comparing the results with other techniques like Ziegler-Nichols method. Numerical results reveal that the PSO-PID controller has better dynamic response, fast convergence, and high-quality-solution than the other approaches based on rise and settling time of terminal voltage signal of generator.
Keywords: AVR system, PID-controller, PSO, constriction factor.