MULTI-OBJECTIVE OPTIMAL ECONOMIC CONFIGURATION OF CCHP INDEPENDENT MICROGRID BASED ON HYDROGEN STORAGE CONSIDERING EXERGY EFFICIENCY

Ren Zhecheng; Yuan Zhi; Li Ji

doi:10.19912/j.0254-0096.tynxb.2024-0850

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (9) : 717-728. DOI: 10.19912/j.0254-0096.tynxb.2024-0850

MULTI-OBJECTIVE OPTIMAL ECONOMIC CONFIGURATION OF CCHP INDEPENDENT MICROGRID BASED ON HYDROGEN STORAGE CONSIDERING EXERGY EFFICIENCY

Ren Zhecheng¹, Yuan Zhi¹, Li Ji²

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Abstract

To balance exergy efficiency and economic cost of microgrids, and to ensure the accuracy and objectivity of the optimization results, a multi-objective capacity optimization method is proposed for hydrogen-based combined cooling, heating, and power （CCHP）independent microgrids, with a focus on exergy efficiency. First, the recovery of waste heat during the electricity-hydrogen-electricity conversion process is considered. An independent microgrid system is proposed, which includes wind and photovoltaic power systems, hydrogen storage systems, air source heat pumps, and absorption chillers. Secondly, the coupling relationship and energy utilization levels of various energy sources in the system are measured using exergy analysis. A multi-objective capacity optimization model is then created with the optimization goals of system's economic cost and exergy efficiency. Lastly, to acquire the best configuration results that consider system's economic cost and exergy efficiency, the ε-constraint approach in conjunction with CRITIC-TOPSIS is employed. The illustration verifies the validity of the proposed model and method, which can satisfy the demand of multiple loads in different typical day scenarios.

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microgrids / hydrogen storage / exergy / multiobjective optimization / capacity configuration

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Ren Zhecheng, Yuan Zhi, Li Ji. MULTI-OBJECTIVE OPTIMAL ECONOMIC CONFIGURATION OF CCHP INDEPENDENT MICROGRID BASED ON HYDROGEN STORAGE CONSIDERING EXERGY EFFICIENCY[J]. Acta Energiae Solaris Sinica. 2025, 46(9): 717-728 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0850

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