TWO-TIER ENERGY MANAGEMENT STRATEGY FOR MICROGRID BASED ON STACKELBERG MASTER-SLAVE GAME
Aiming at the rationality and economic issues of energy dispatch in microgrids containing high proportions of renewable energy,a microgrid energy management strategy based on a two-layer master-slave game is proposed.The upper layer of the model takes the microgrid energy management center as the leader to sell electricity.Profit maximization is the optimization goal,reducing expenditures and increasing profits by adjusting electricity purchase and sales price strategies.At the same time,it interacts with the upper-level power grid when the internal supply and demand of the microgrid are unbalanced;the lower-level model treats distributed power operators and users as followers,taking the maximum electricity sales revenue and the minimum electricity cost as the planning goals respectively,and optimizing the interests of each entity by changing the output of internal combustion equipment and the energy usage strategy of users.The existence and uniqueness of the Stackelberg equilibrium of the proposed model are proved and solved using an improved genetic algorithm to obtain the optimal strategy of each stakeholder.Finally,it is verified by numerical examples that the proposed two-layer game model can maximize mutual interests and effectively manage the energy use of all parties.
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