Research On Game Theory And Electricity Price Model Of Grid Connected Microgrid And Distribution Network

As an important way of using new energy,microgrid has been booming in recent years.China has promulgated a number of documents to promote the construction of grid-connected microgrid and the market reform.The construction of grid-connected microgrid has continued to increase,and the competition in the power market has gradually diversified.The original operation mode of the power market has been changed by the grid-connected operation of microgrid.Therefore,the competition and cooperation relationship between microgrid and power distribution network should be considered comprehensively,and a reasonable electricity price mechanism should be formulated to provide a theoretical support for the further development of microgrid and market competition.This paper focuses on the interactive pricing strategy between grid-connected microgrid and distribution network under different market conditions.Firstly,starting from the impact of grid-connected operation of micro-grid on distribution network,the game relationship between micro-grid and distribution network in simple market and multi-market players in real-time market are analyzed respectively.Subsequently,the cost-benefit model of microgrid considering multi-factors and the comprehensive benefit model of distribution network considering economic and social benefits are established.The two models can effectively quantify the comprehensive cost and benefit of microgrid and distribution network.The cost-benefit is divided into capacity benefit and electricity benefit.The optimal benefit model of micro-grid and distribution network are established to maximize the comprehensive benefit.The interactive pricing strategy of micro-grid and distribution network in simple market is put forward.Based on market supply and demand theory,game theory and the interactive price relationship between microgrid and distribution network in a simple market,a hierarchical two-level non-cooperative game is established for the buyers and sellers of electricity in a real-time market.The existence of Nash equilibrium points in the game model is proved and Nash equilibrium points are solved.The model and the proposed strategy are validated by an example.The model built in this paper is applicable to the pricing of grid-connected microgrid under different market conditions,and provides a reference for the development of grid-connected microgrid and the reform of power market system.