Research On Synergetic Optimization Of Multi-Microgrids Integrated Energy System Based On Game Theory

For the multi-microgrids integrated energy system(MMGIES)with electrical energy interaction,the interaction of interests among agents in a MMGIES is studied by game theory,aiming at system economy and exergic efficiency,and considering the benefit interaction among microgrids(MGs),a multi-objective union optimal configuration strategy for multi-microgrid integrated energy system considering bargaining game is proposed.Fully consider the user’s active behavior and the benefit interaction between the user and the MMGIES,a optimal dispatch of multi-microgrids integrated energy system based on integrated demand response and Stackelberg game is proposed.In this dissertation,the physical structure and the main equipment of the MMGIES with power interaction are introduced firstly.Grounded on considering different typical scenes of MMGIES,linearized bargaining game is introduced to model the beneficial interaction of multiple MGs.For the expected annualized total cost and exergic efficiency of MMGIES,using Tchebycheff method to find the Pareto optimal front,and the final optimized configuration plan is obtained by subjective and objective comprehensive weighting method which takes entropy coefficient method mixed with fuzzy analytical hierarchy process as the foundation.The necessity and reasonability of intruding bargaining game to analysis the beneficial interaction of MMGIES with power interaction is proved as shown by the case study.Aiming at economy and exergic efficiency,the muti-objective optimized configuration plan take the economic performance and high efficiency of energy cascade utilization as consideration,which is better than single-objective configuration plan.An optimal dispatching strategy based on the integrated demand response and leader-followers game is proposed for the multi-microgrids integrated energy system with electric power interaction.Firstly,an integrated demand response model was established includes shiftable disturbed electrical load,shiftable undisturbed electrical load,flexible thermal load and cooling load.Then,a leader multi-followers interaction equilibrium model was formed with the setting where multi-microgrids system as the leader and the multi-microgrids users as the followers,which optimized the pricing strategy of the multi-microgrids system,the demand response scheme of each microgrid users and the output of various energy conversion coupling devices in the multi-microgrids system at the same time,besides,the existence and uniqueness of the equilibrium solution of the game were proved.Finally,the rationality and effectiveness of the proposed strategy were demonstrated through the case analysis.There is to say,the profitability of the multi-microgrids system and the comprehensive benefit and energy cost of each microgrid users are improved.