Study On Interactive Strategies Between Vehicles And Grid Based On Game Theory

With the rapid development of electric vehicles and smart grid,the problem of interaction research between electric vehicles and grid has been paid more and more attention.Reasonably interactive strategies between vehicles and grid are of great significance to electric vehicles and grid.The interaction behaviors between electric vehicles and grid are mainly reflected through the corresponding behaviors after electric vehicles connected to the grid,the different interactive behavior shows the different interests of both sides.The interests of the two sides have a certain conflict,but can be coordinated,and can be in line with the characteristics of the game problem,so this paper uses the game theory model to study interactive strategies between electric vehicles and grid.This paper firstly expounds the research status of interactive research between electric vehicles and grid and the research status of game theory applied to electrical power system,and analyzes the problems of interactive research between electric vehicles and grid and the important application of game theory in interaction between electric vehicles and grid.Based on the detailed analysis of the forms and characteristics of interaction between electric vehicles and grid,this paper uses the Stackelberg game model to study it and analyze the interests of the each of electric vehicles and grid in the interaction,and then it uses the optimization algorithm to solve the equilibrium point of interests.Finally,The balance of electric vehicles and grid is charge and discharge prices and power exchange based on the charge and discharge prices.This paper studies the using condition of electric vehicles in a certain area and the load situation of grid company.The results show that the interactive strategies can reduce the cost of electric vehicles and make the effect of "cutting peak and filling valley" on the load of the grid and realize the balance of interests between electric vehicles and grid.In addition,this paper analyzes the each behavior of electric vehicles and grid in the interaction and the concrete expression of the interests of two sides in the interaction process.The distribution of the cooperative income between the electric vehicles and grid is made by using the average benefit distribution method and the improved Shapley value method in the cooperative game theory,respectively.And it uses specific example to calculate the each income distribution value of two sides when different numbers of electric vehicles participating in the cooperation.The results show that the improved Shapley value method can distribute the income more equitably and promote the more active participation in the cooperation between electric vehicles and grid.