Direct current coupling optical storage system control method with high utilization rate

The invention provides a direct-current coupling optical storage system control method with a high utilization rate, which is suitable for charge and discharge regulation and control among n groups of direct-current coupling optical storage systems, and n is greater than or equal to 2. Each group of direct-current coupling optical storage system comprises a photovoltaic array PV, a direct-current charging power supply DD, a battery pack B and a grid-connected inverter DA, one output path of the photovoltaic array PV is connected with a power grid through the grid-connected inverter DA, and the other output path of the photovoltaic array PV is connected with the battery pack B through the direct-current charging power supply DD; each group of direct-current coupling optical storage systems is connected in parallel to a power grid, and the output ends of the photovoltaic arrays of two adjacent groups of direct-current coupling optical storage systems are connected through a converter DDS; in each group of direc