| In order to meet the increasing demand for energy and make full use of renewable energy resources,more and more microgrids system with large-scale distribution generation emerged in the distributed network have attracted more and more attention,which will become the important development direction of the future energy construction.In addition,with the high participation of demand resources,the requirement for demand side management in the future power system and energy network will be higher and higher.In view of the main role of demand response to economic operation of power trading in the demand side of energy internet,after analyzing the research status and application of game theory in power trading at home and abroad,this paper focuses on multi-microgrid system power trading modes based on game theoretic model.The main contribution of this work is listed as follows.First of all,the concepts and classification of game theory and demand side management are introduced in detail.On the basis of non-cooperative game and stackelberg game,general models are presented.Furthermore,the existence theorems of Nash equilibrium are explained.Also,the application of different demand response measures is taken into account.Secondly,considering the transaction behavior of multi-microgrid with controllable distributed generation units,a non-cooperative game theoretic model is proposed to study power trading among multi-microgrid system involved in the distribution network.The existence of Nash equilibrium point of the non-cooperative game model is proved theoretically,and the reasonable power trading price and the service fee quoted by distribution network are calculated.What's more,the influence of generation cost and installed scale of controllable distributed generation units on the power trading mode and the revenue function of game players are analyzed emphatically.Last but not least,considering the sequential game process between power generation companies and multi-microgrid systems,a stackelberg game theoretic model to study power trading between power generation side and demand side is established.From the aspect of demand respond of each microgrid and pricing strategies made by power generation companies,the proposed model achieved the maximum revenue of the generation side as well as the minimum cost of the demand side.And we illustrate different impacts on power trading mode from four dimensions of renewable energy access scale,cutting load scale,controllable generation power generation unit cost and installed scale. |
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