Cooperative Operation Optimization Strategy Of Multi-Comprehensive Energy Microgrid Based On Nash Bargaining

In recent years,with the continuous development of economy and society and the continuous improvement of the degree of industrialization,global fossil energy consumption caused by energy shortage,environmental pollution and other problems are increasingly serious.The comprehensive energy micro-grid,which takes scenic new energy as the main power supply,is an important part of the new power system and also an important link to achieve the goal of "double carbon".Under the background of energy marketization,this thesis studies the basic structure of comprehensive energy micro-grid,low-carbon optimization scheduling model of comprehensive energy micro-grid and cooperative operation optimization of multicomprehensive energy micro-grid.The main contents are as follows:Firstly,starting from the basic structure of a single comprehensive energy microgrid in the multi-microgrid alliance,the internal energy supply equipment model,the demand-side response model and the carbon transaction cost model of the microgrid are established respectively,which lays the foundation for the subsequent research work.Secondly,starting from the low-carbon optimal scheduling model of integrated energy microgrid,combined with the operation characteristics of combined heat and power(CHP),power-to-gas(P2G)and carbon capture system(CCS),A joint operation model of CHP-CCS P2G(CCP)was proposed,and the electrical and thermal output characteristics and carbon emission characteristics of CHP units under this model were analyzed,and a comprehensive energy microgrid optimization scheduling model considering carbon trading was established under this model.The comparison of examples shows that CCP joint operation mode can reduce the degree of thermoelectric coupling of CHP units,improve the absorption space of new energy,and reduce the operation cost and carbon emission of micro-grid.Finally,aiming at the cooperative operation optimization problem of multicomprehensive energy microgrid with electric-carbon interaction,a cooperative operation optimization model of multi-microgrid based on Nash bargaining was established,and the Nash bargaining problem in the model was transformed into the cost minimization problem of multi-microgrid alliance and the payment income maximization problem of sub-microgrid,and distributed solution was adopted by alternating direction multiplier method.Through comparison of examples,it is proved that the proposed model can effectively realize the sharing of power and carbon emission among microgrids,and its effectiveness in reducing the operating cost and carbon emission of microgrids is verified.