Tandem type microgrid structure of island operation and power control method of structure

The invention relates to a tandem type microgrid structure of island operation. The structure comprises a DC power generation unit, a DC/AC conversion circuit and a sampling circuit, wherein the DC power generation unit comprises a DC bus capacitor, the DC/AC conversion circuit comprises a main power inversion circuit and a filter circuit, and the sampling circuit comprises a filter inductor current sampling circuit and a filter capacitor voltage sampling circuit. The invention also relates to a power control method of the microgrid structure. The structure and method have the advantages that a DC/DC boosting link in a traditional microgrid structure is omitted from the microgrid structure in the invention, the system cost is reduced, and the efficiency of a converter is improved.