The research on photovoltaic power flexible grid-connected in microgrid based on H∞ control

With the increasing proportion of photovoltaic power in the microsource, the power quality problem brought by the dynamic process of grid-connected and off-grid cannot be ignored any more. Therefore, this paper puts forward a control method of photovoltaic power flexible grid-connected based on H∞ control. This method combines the photovoltaic power grid-connected filter model and the H∞ control principle based on model matching to design H∞ flexible grid-connected controller. The simulation result shows that under different conditions such as no-load and on-load, the controller can precisely control photovoltaic port voltage to achieve seamless grid connection of the photovoltaic. This controller has the advantages of good dynamic performance and stability.