Energy Management Of Microgrid Based On Game Theory

Because of energy shortage and environmental pollution,distributed generation technology is favored by people.Distributed energy generation can be consumed locally,it not only reduces the pressure on the main grid but also reduces the power transmission loss.However,Renewable energy generation units are not controlled.A large number of connections will adversely affect the main grid and the lives of users.In this way,the safety and stability of the main grid cannot be guaranteed.The microgrid is clean,micro,and autonomous that can accommodate renewable energy.However,a large number of renewable energy access poses a challenge to the stability of the microgrid.Therefore,it is very important to manage the power generation units and loads in the system and improve the overall benefits of the microgrid.In this paper,the utility function of the micro-grid is managed optimally to optimize the energy of the micro-grid.Firstly,this paper analyzes and introduces the structural characteristics of the microgrid,the characteristics of each power generation unit in the microgrid are analyzed,and establishes the cost function.It provides the theoretical basis for the later work.Secondly,This article considers a microgrid containing renewable energy power generation units and energy storage systems,Study the relationship between the microgrid,the power company and users,when the microgrid is the leader.In the system,the power generation cost and power sales revenue of microgrid and the power company,user satisfaction and power purchase cost are considered.A profit function game model is established for the costs and benefits of power companies,microgrids and users,and is solved by reverse induction.This paper studies the relationship between the microgrid and the power company and users when the microgrid is the follower.It should be noted that the position of the microgrid in the game has changed from the master to the follower.A profit function game model is established for the costs and benefits of power companies,microgrids and users.Through the optimization of the electricity price by the microgrid and the power company,and the optimization of the power purchase by the user,the game equilibrium is finally reached.Use reverse induction to get a closed-form solution.Finally,the optimal electricity price and utility value when the microgrid is the leader and follower are obtained through solving.Through comparison,it can be obtained that the optimal electricity price and utility value are both higher when the microgrid is the follower than when it is the leader.