INTEGRATED ENERGY SYSTEM STORAGE CAPACITY CONFIGURATION CONSIDERING THERMAL/GAS NETWORK EQUIVALENT ELECTRICAL ENERGY STORAGE CHARACTERISTICS

Yan Wentao; Wang Weiqing; Li Xiaozhu; Ding Ying

doi:10.19912/j.0254-0096.tynxb.2024-2006

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (6) : 19-31. DOI: 10.19912/j.0254-0096.tynxb.2024-2006

Special Topics of Academic Papers at the 27th Annual Meeting of the China Association for Science and Technology

INTEGRATED ENERGY SYSTEM STORAGE CAPACITY CONFIGURATION CONSIDERING THERMAL/GAS NETWORK EQUIVALENT ELECTRICAL ENERGY STORAGE CHARACTERISTICS

Yan Wentao, Wang Weiqing, Li Xiaozhu, Ding Ying

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Abstract

To give full play to advantages of multi-energy synergy, efficiency, and environmental sustainability in integrated energy systems （IES） while tapping into underutilized energy storage resources, this paper proposes an energy storage capacity allocation method that accounts for the equivalent electrical storage characteristics of thermal and gas networks. Firstly, the thermal storage capacities of thermal networks, buildings, and combined heat and power（CHP） units are quantitatively analyzed using the finite element difference method, thermal inertia analysis, and CHP operational characteristics. A conversion method is then introduced to translate thermal storage capacity into equivalent electrical storage capacity. Secondly, the dynamic behavior of natural gas pipelines is modeled using energy and momentum conservation equations, and pipeline gas storage is quantified via finite element simulations. A conversion method is similarly proposed for translating gas network storage capacity into equivalent electrical storage capacity. Based on these considerations, an optimized allocation model for electrical energy storage in IES is developed to minimize energy storage investment size and initial costs. Finally, case studies validate the feasibility and competitiveness of the proposed approach, demonstrating that incorporating the equivalent electrical storage characteristics of thermal and gas networks reduces storage investment costs by 4.18%.

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energy storage / renewable energy / finite element analysis / integrated energy system / thermal inertia / pipeline storage

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Yan Wentao, Wang Weiqing, Li Xiaozhu, Ding Ying. INTEGRATED ENERGY SYSTEM STORAGE CAPACITY CONFIGURATION CONSIDERING THERMAL/GAS NETWORK EQUIVALENT ELECTRICAL ENERGY STORAGE CHARACTERISTICS[J]. Acta Energiae Solaris Sinica. 2025, 46(6): 19-31 https://doi.org/10.19912/j.0254-0096.tynxb.2024-2006

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