Research On Trading Strategy Of Multi-energy Microgrids Participating In The Electricity-gas Multi-energy Market Based On Stackelberg Game

In recent years,with the development of the integrated energy system,the independent traditional single energy system is developing into a coordinated multi-energy system.Therefore,under the energy background of multi-energy network interconnection and multi-market agent cooperative operation in the future,how to further promote the nearby consumption of distributed energy and improve the synergistic efficiency of multi-energy has attracted wide attention.As terminal units of integrated energy systems,multi-energy microgrids(MEMGs),which have abundant adjustable resources and flexible scheduling ability,can effectively utilize various distributed energy sources and improve the utilization efficiency of various energy sources.In addition,through strategic participation in regional multi-energy market trading,MEMGs not only realizes the energy interaction between MEMGs and various energy networks,but also enhances the multi-energy microgrid operator(MEMGO),distribution system operator(DSO)and gas system operator(GSO).Therefore,considering the energy interaction characteristics of different levels between distribution and micro-networks in the regional electricity-gas integrated energy system,each market agent needs appropriate market trading strategies to optimize and clear the multi-energy market so as to obtain a reasonable energy settlement price and reduce the energy purchase cost of each agent.Based on the above background analysis,the main research work of this paper is as follows:1)The research status of the participation of MEMGs in the electricity market and multienergy market transactions is introduced.The optimal tide model of the distribution network and the gas distribution network is constructed,and the relationship between the clearing model and the tide model of the distribution market and the gas distribution market is elaborated,and the structural framework of the regional electricity-gas multi-energy market is constructed with the micro gas turbine as the coupling element to reveal the coupling relationship and the market clearing mechanism between the regional electricity-gas multi-energy market.2)Considering the Stackelberg game relationship between DSO and MEMGO,a model of MEMGs participating in distribution market clearing considering Stackelberg game is proposed.Firstly,the Stackelberg game relationship between DSO and MEMGO is clarified,and based on the Stackelberg game,the mechanism of considering MEMGs participation in distribution market clearing is established.Secondly,solve the proposed model according to the distribution market clearing mechanism and distributed algorithm.Finally,take the test system composed of IEEE 33 nodes and two MEMGs as an example to verify the reasonableness and effectiveness of the proposed model,the results indicate that the interaction between DSO and MEMGOs can reduce the electricity settlement price and improve the economic benefits of DSO and MEMGOs.3)Based on the Stackelberg game relationship of distribution-micro synergy,with DSO and GSO as the leader and each MEMGO as the follower,a multi-agent Stackelberg game trading model is constructed considering MEMGs’ participation in the electricity-gas multienergy market.First,the distribution locational marginal electricity price and distribution locational marginal gas price are used as the settlement energy price under the regional electricity-gas multi-energy market clearing mechanism.Then,on the basis of proving the existence of Stackelberg equilibrium solution in the multi-agent Stackelberg game trading model,the proposed model is solved by the alternating direction method of multipliers to ensure the information privacy of each agent.Finally,the feasibility and effectiveness of the proposed multi-agent trading strategy are verified by REGES 13-7 and REGES 123-20 test systems,the results indicate that utilizing interactive transactions between multi-agent can increase the enthusiasm of MEMGs to participate in multi-energy market transactions and reduce the energy purchasing costs of each market agent.