Fractional Order PID PLL Controller Based on Particle Swarm Optimization Algorithm

Abstract

In this paper, a Fractional Order PID PLL controller based on particle swarm optimization algorithm is proposed for power grid system. The parameters of Fractional Order PID controller are optimized by particle swarm optimization algorithm, so as to control the orthogonal signal generator in PLL, realize accurate phase discrimination and effectively suppress grid harmonics.In this paper, firstly, the mathematical model of PLL is established, and then the PID controller and Fractional Order PID controller are compared and controlled. Finally, the parameters of Fractional Order PID controller are optimized by particle swarm optimization algorithm to achieve the optimal control.In this paper, the simulation of PLL controller is completed based on MATLAB / Simulink. The simulation results show that the Fractional Order PID based on PSO algorithm can automatically find the optimal control parameters, realize the precise control of PLL, and improve the ability of filtering harmonic and dynamic performance of power grid.