Photovoltaic power station system efficiency calculation system, method, device and medium

The invention provides a photovoltaic power station system efficiency calculation system, method and device and a medium, and belongs to the technical field of photovoltaic power generation. According to the system, an arrangement structure acquisition module acquires the installed capacity of each photovoltaic module array, the installed capacity of a photovoltaic power station and the accumulated standard irradiation dose of the photovoltaic power station; the environment radiation acquisition module acquires the real-time environment radiation amount of each photovoltaic module array; the electric quantity acquisition module acquires the accumulated generating capacity of the photovoltaic power station; and the system efficiency calculation module calculates the weighting coefficient of each photovoltaic module array, the cumulative irradiation dose of each photovoltaic module array, and obtains the system efficiency of the photovoltaic power station based on the cumulative generating capacity, installed c