Cost-aware modeling and operation of interconnected multi-energy microgrids considering environmental and resilience impact.

Multi-energy microgrids (mMGs) are gaining rapid popularity due to the incorporation of multiple types of energy sources. Given the importance of mMGs in future energy networks, resilient, accurate economic, and environmental assessments of mMGs, as well as their interconnection, have become immense challenges. To deal with this problem, this paper presents a resilient optimization method for optimal sizing and operation of renewable-based mMGs to meet electricity and heating demand. The primary goals of this research are to reduce the system's overall energy cost, ensure continuous power supply during power outages, and reduce environmental emission rates in mMGs enriched by the combined heat and power (CHP) unit, photovoltaic (PV), boiler unit, battery, thermal energy storage (TES), and geothermal heat pump (GHP) technologies. Game theory concepts, such as nucleolus and Shapley value , are leveraged to allocate costs between interconnected mMGs running under a coalitional paradigm, resulting in a lower optimized cost. Further, a techno-economic analysis is performed to investigate the performance of the proposed system over the business as usual (BaU) case. The results affirm the lucrativeness of the proposed model and the substantial reduction in life cycle cost, utility cost, and emission while remaining outage resilient. • All the proposed microgrid's power supply units are extensively modeled. • The optimal sizing and dispatch strategy of each source of multi-energy microgrid is performed with the purpose of minimizing cost. • The environmental impact of purchasing electricity from the grid and using on-site CHP fuel is greatly modeled. • Participating microgrids employ a cost-based interconnection strategy which further reduces their overall operational cost. • Developed and tested a microgrid resilience index for prolonged grid outages under various loads. [ABSTRACT FROM AUTHOR]