Harmonic Resonant Control Strategy of Grid-Connected Inverter Based on Multi-Objective Particle Swarm Optimization

In the actual operation of the grid-connected inverter, there will be a large number of low-order harmonics in the grid-connected current, resulting in a decrease of the grid current quality. Therefore, this paper adopts a harmonic resonant controller to suppress harmonics of grid current, and the parameters specific design constraints are presented. At the same time, in view of its weakening for system phase margin and the complex design of many parameters, this paper proposes multi-objective particle swarm algorithm to further optimize the parameters of the system, so that the system has good control performance. Finally, the simulation results verify that after the system adopts the algorithm optimized harmonic resonant controller, low-order harmonics can be significantly inhibited, and the dynamic performance can also be good at the same time.