Research on Harmonic Suppression Method Based on Drooping Control Strategy

摘要

The use of a large number of power electronic devices in microgrids, as well as micro power supplies such as photovoltaic power generation and wind power generation, have uncertainties and power fluctuations, all of which make the microgrid higher in harmonic content. This paper first analyzes the harm of harmonics in the microgrid. It mainly analyzes the harmonic suppression function of the droop control method with virtual impedance. Second, it analyzes the harmonics generated by the microgrid system, especially the distributed power supply, and proposes The harmonic suppression method based on droop control; Finally, a microgrid harmonic suppression simulation model based on Second-order generalized integral (SOGI) virtual impedance method for droop control strategy was built under the environment of MATLAB/Simulink to suppress the harmonics of isolated and grid-connected microgrids. The characteristics were studied to verify the effectiveness of the method.