Mixed Game Theory Based to Thermoelectric Cooperative Operation of Community Micro-Energy Grids Considering Subject Contribution and Energy Sharing

Abstract

With the increasing popularity of energy storage technology, community micro-energy grids (CMEGs) play a crucial role in enhancing the utilization of renewable energy and achieving a balance between supply and demand. However, this poses a challenge to the efficient energy management of CMEG. In this context, an optimal operation strategy for CMEG based a two-layer game model with electric-thermal energy sharing considering heterogeneous energy storage is proposed. In this paper, a framework for electric-thermal energy sharing among CMEGs with community users as load aggregators(LAs) has been established first. Then, a mixed game simulation model was built with the microgrid operator (MGO) and multiple load aggregator (MLA) as the main components. To ensure a fair distribution of cooperative benefits among LAs, an asymmetric bargaining model based on each subject's participation contribution degree was proposed. The cost and strategy of energy utilization for the CMEGs under three typical scenarios of the study case were analyzed by the proposed model. The case study demonstrated that the cooperative game mode, compared to the traditional independent operation mode, led to a 5.1% decrease in electricity transaction between MLA and MGO, along with a 10.87% decrease in heat transaction. The simulation results indicate that the optimization strategy balances the interests of components and facilitates a fairer distribution of benefits among communities.

Keywords: Community micro-energy grid, heterogeneous energy storage, mixed game, energy sharing, subject contribution, Asymmetric bargaining