RESEARCH ON MULTI-TIME SCALE OPTIMIZATION OF INTEGRATED ENERGY SYSTEM BASED ON MULTIPLE ENERGY STORAGE

Guo Yunfeng; Qian Jiangbo; Liu Ao; Wu Di

doi:10.19912/j.0254-0096.tynxb.2024-1163

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (11) : 461-469. DOI: 10.19912/j.0254-0096.tynxb.2024-1163

RESEARCH ON MULTI-TIME SCALE OPTIMIZATION OF INTEGRATED ENERGY SYSTEM BASED ON MULTIPLE ENERGY STORAGE

Guo Yunfeng¹, Qian Jiangbo^1,2, Liu Ao¹, Wu Di^1,2

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Abstract

To tackle the challenge of source-load imbalance caused by the underutilization of renewable energy and the variability in user demand,this research introduces a multi-time scale optimization strategy for an integrated energy system featuring multiple energy storage units. The proposed strategy employs a systematic three-tier optimization framework,designated as “day-ahead—intra-day—real-time peak regulation and frequency modulation”. This framework meticulously refines the operational plans for all system components at different stages. Specifically,the day-ahead optimization operates on a 1-hour time scale, the intra-day optimization on a 15-minute interval,and the real-time adjustment on a 1-minute cycle. In real-time planning, supercapacitor（SC） equipment is incorporated into the output plan for each day-intra equipment schedule,employing variational mode decomposition（VMD） frequency division technology. The system’s differential power is divided into high-frequency and low-frequency components,and both the energy-type and power-type storage devices are reconfigured. Through this process,the study determines the optimal VMD frequency-dirition ration. The results show that the charge and discharge cost of the lithium-ion battery can be saved 90% by increasing the supercapacitor in the real-time optimization stage,and the charge and discharge times are reduced from 131 to 13 times.

Key words

energy storage / integrated energy / supercapacitor / multi-time scale / VMD frequency division

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Guo Yunfeng, Qian Jiangbo, Liu Ao, Wu Di. RESEARCH ON MULTI-TIME SCALE OPTIMIZATION OF INTEGRATED ENERGY SYSTEM BASED ON MULTIPLE ENERGY STORAGE[J]. Acta Energiae Solaris Sinica. 2025, 46(11): 461-469 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1163

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