Research on Harmonic Suppression Control Strategy for Grid Side Converter

Wind power, as a clean energy source, has been vigorously developed. In wind power generation systems, inverters are one of the crucial components, and the quality of their output grid connected current directly affects the safe and reliable operation of the power grid. Firstly, This article provides an in-depth analysis of the harmonic content in the grid connected current of the inverter output terminal; Secondly, Design a novel composite control strategy based on phase-locked loop technology, PI control, and grid voltage feedforward compensation (PLL-PI-GVFC) to suppress the harmonic content in the grid connected current of the inverter output terminal; Finally, a simulation model was built using the Matlab/Simulink platform, and the simulation was dragged to verify the comparison between the new harmonic suppression control strategy and the original control. The conclusion shows that The PLL-PI-GVFC control strategy can better suppress harmonics in the output current of the inverter. The shortcoming is that the results cannot be verified by building a physical model. We hope to further verify the correctness of the simulation results in the future when conditions permit.