Research On Energy Trading Method Between Multiple Microgrids Under The Background Of High Proportion Of New Energy Penetration

Multiple microgrids in the same power distribution area are interconnected,and through the way of market transaction,the surplus and shortage of microgrid’s electric energy are mutually supplemented,which opens up a new idea for solving the problem of renewable energy accommodation.In the situation of imperfect market mechanism and immature operation mode of China’s microgrid,it is of great significance to explore a new mode of microgrid power transaction and study a new mechanism suitable for multi microgrids transaction,so as to improve the construction of China’s power market and activate the business potential of microgrid.This paper has carried out a series of work on the establishment of a new mode of power trading between multi-microgrids.First of all,depends on autonomy and sociality of multi-agent system,build a multi-microgrids system hierarchical model based on MAS,and on the basis of deep mining the transaction characteristics of multi-microgrids,a set of complete commercial mechanism suitable for multi-microgrids transactions is systematically developed,including transaction process,price setting,power distribution rules;Then,Comb through comprehensive energy trade conflicts of interest relationship between multi-microgrids.,contributing to microgrid was constructed considering the historical transaction utility function to evaluate the net in the trading of satisfaction,which will be more energy competition between multi-microgrids problem into the problem of cooperative game,and built with the microgrid utility maximization as the goal of multi-microgrids non-cooperative continuous strategy game model;Then,the Nash solution of the game model is completed on the basis of proving the existence and uniqueness of Nash equilibrium,and then the optimal energy competition strategy is given.Finally,the proposed multi-microgrid system is used as a research example.The results show that the proposed transaction method can reduce the energy exchange between microgrid and distribution network and effectively reduce the operating cost of the system,which has a certain reference significance for improving the electricity transaction mode and optimizing the pricing scientifically.