Taking photovoltaic - battery system as a research object

the sizing and operation optimization model of the photovoltaic-battery system based on decomposition-coordination method is constructed. Firstly

taking the comprehensive cost including the energy storage investment cost and the operating cost of the optical storage system as the objective function

the Benders decomposition method is used to decompose the model into the main problem of planning and configuration and the sub -problem of operation scheduling. Then the capacity investment cost of energy storage and system operation cost are divided as the objective function of the main problem and sub-problem

the optimal configuration plan of the energy storage battery and the optimal operation strategy of the system are obtained through decomposition

coordination and optimization. At the same time

set a series of indicators such as the photovoltaic consumption rate

self-sufficiency rate

internal rate of return

and dynamic investment recovery period to evaluate the model. In addition

the visualization of the accumulation process of Bender cut sets is realized

and visually the convergence process of the Benders decomposition method is showed. Based on this

the K- means cluster analysis algorithm is used to establish an annual pho tovoltaic output model

the optimal configuration of energy storage batteries on a long-term scale is solved

and the feasibility of solving the decomposition and coordination optimization model on the medium and long-term scale is explored.