Method for optimizing cost of photovoltaic system for power plant

The invention provides a cost optimization method for a plant photovoltaic system of a power plant, which takes a plant system of the power plant as a relying unit of the photovoltaic system and is combined with a power system optimization operation method. A photovoltaic power generation income model, a photovoltaic power generation prediction cost model, a reactive compensation cost model and a power plant service system network loss cost and other non-technical cost model are constructed, multi-objective functions of the five models are synthesized into a single-objective model for power plant service photovoltaic system cost optimization, and iterative calculation solution is performed through a wolf pack algorithm. Finally, the lowest cost of the photovoltaic system and the optimal solution of each independent variable are obtained, and the lowest cost of the photovoltaic system for the power plant is realized. According to the cost optimization method for the plant photovoltaic system of the power plant