Multi-Micro-Grid Main Body Electric Heating Double-Layer Sharing Strategy Based on Nash Game

Abstract

In order to promote energy mutual aid among microgrids, expand the types of energy interaction, and improve the utilization of renewable energy, a two-layer sharing strategy for multi-microgrids (MMGs) based on the Nash game is proposed. Firstly, the low-carbon transformation of the micro-grid model is carried out, and the source side is transformed into a comprehensive and flexible operation mode for carbon capture thermal power plants. Then, the multi-microgrid subject electro-thermal double-layer sharing model based on the Nash game is constructed, which is decomposed into a revenue maximization sub-problem and a revenue redistribution sub-problem. In the sub-problem of revenue maximization, considering the lowest operation cost of carbon allowances and stepped carbon trading as the goal, the alternating direction multiplier method is used for a distributed solution. In the revenue redistribution sub-problem, the reasonable redistribution of income is realized by constructing the asymmetric energy mapping contribution function for different periods and energy types. Finally, the simulation results have verified the effectiveness of the proposed method. The results showed that the strategy of this paper can achieve the optimization of the economic objectives of the multi-microgrid (MMG) alliance and has the advantages of reasonable redistribution of benefits, promotion of wind and solar consumption, and reduction of carbon emissions.