Control method of wind, photovoltaic and storage micro grid system

Provided is a control method of a wind, photovoltaic and storage micro grid system. The wind, photovoltaic and storage micro grid system can be switched between a grid-connected mode and an island mode via the method. When a large electrical network has fault, the wind, photovoltaic and storage micro grid system is automatically switched into the island operation mode; when the large electrical network is recovered, the wind, photovoltaic and storage micro grid system is automatically switched into the grid-connected operation mode; and when the wind, photovoltaic and storage micro grid system is in the grid-connected mode, the current peak-valley electricity price is optimized and controlled, and an energy storage device is controlled to obtain the most economical operation state of the wind, photovoltaic and storage micro grid system. The safety of the wind, photovoltaic and storage micro grid system can be ensured, and normal operation of loads connected to the wind, photovoltaic and storage micro grid system can be ensured.