Optimal operation of geothermal-solar-wind renewables for community multi-energy supplies

• Published in: Energy (Oxford) Vol. 249; p. 123672
• Main Authors: Xu, Da, Yuan, Zhe-Li, Bai, Ziyi, Wu, Zhibin, Chen, Shuangyin, Zhou, Ming
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 15.06.2022; Elsevier BV
• Subjects: Accommodation; Alternative energy; Coupling; Distributed generation; Electrochemistry; Energy conversion; Energy coupling; Energy flow; Energy hub; Energy storage; Integrated energy systems; Microgrid; Operating costs; Renewable energy; Renewable resources; Solar energy; Solar wind; Energy hub; Renewable energy; Microgrid; Integrated energy systems; Energy storage
• ISSN: 0360-5442; 1873-6785
• DOI: 10.1016/j.energy.2022.123672

This paper proposes a geothermal-solar-wind renewable energy hub framework for community multi-energy supplies. In this framework, multi-energy complementarities of geothermal-solar-wind hybrid renewable energy are fully explored based on electrolytic thermo-electrochemical effects of geothermal-to-hydrogen (GTH), which is integrated with the multi-energy conversion and storage devices for multi-energy supplies. In order to exploit the inherent multi-energy operational dispatchability and flexibility of geothermal-solar-wind renewables, a multi-energy coupling matrix is formulated for the modeling of production, conversion, storage, and consumption of hub-internal electricity, hydrogen and heating energy. A multi-energy operation scheme is further developed to dispatch the energy flows of the coupling matrix for cost-effective accommodation of community renewables. Case studies on a community microgrid under grid-connected and grid-disconnected modes are performed to verify the effectiveness and superiority of the proposed methodology. Simulations results show that the solar-wind accommodation can be improved by at most 1.59% with a significantly lower system operating cost. •An electrolytic thermodynamic network is formulated to model the thermo-electrochemical effects.•Geothermal-solar-wind 100% renewables is proposed for multi-energy supplies.•A multi-energy operation scheme is developed to dispatch the electricity, thermal, and hydrogen flows.•The costs during production, conversion, storage, and consumption process are considered.