RESEARCH ON FUZZY CONTROL-BASED INTEGRATED CONTROL STRATEGY FOR HYBRID ENERGY STORAGE PARTICIPATION IN POWER GRID PRIMARY FREQUENCY REGULATION

Han Pengyi; Zheng Lixing; Liu Shugen; Xue Xiaojun; Yan Laiqing

doi:10.19912/j.0254-0096.tynxb.2024-2285

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (5) : 468-478. DOI: 10.19912/j.0254-0096.tynxb.2024-2285

RESEARCH ON FUZZY CONTROL-BASED INTEGRATED CONTROL STRATEGY FOR HYBRID ENERGY STORAGE PARTICIPATION IN POWER GRID PRIMARY FREQUENCY REGULATION

Han Pengyi¹, Zheng Lixing¹, Liu Shugen², Xue Xiaojun¹, Yan Laiqing¹

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Abstract

Due to the limitation of energy storage output and the problem of overcharging and over-discharging of the state of charge of a single energy storage system during the process of primary frequency modulation, an integrated control strategy based on fuzzy control for hybrid energy storage participation in the primary frequency modulation of the power grid is proposed. Firstly, a hybrid energy storage system is constructed based on the fast-charging and fast-discharging characteristics of supercapacitors and the large-capacity characteristics of batteries, and the sequence of frequency modulation actions is set as supercapacitors before batteries, and batteries before thermal power units. Secondly, a fuzzy controller containing virtual negative inertia control is designed to achieve smooth switching and complementary advantages among different control modes. Meanwhile, adaptive parameters, storage feedback control parameters, and SOC self-recovery output are designed based on the Logistic function to avoid overcharging and over-discharging energy storage. Finally, Matlab/Simulink software is used to build a simulation model, where the proposed integrated control strategy is simulated and analyzed based on the actual power load of the grid. The results show that, compared to the scenario without energy storage, this control strategy reduces the maximum frequency deviation by 61.1% and shortens the time required for the grid frequency deviation to reach a stable value by 82.8%. It effectively enhances the system's frequency regulation capability, improves the output of energy storage, and stabilizes the state of charge of the energy storage equipment.

Key words

energy storage / frequency modulation / fuzzy control / state of charge / control strategy

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Han Pengyi, Zheng Lixing, Liu Shugen, Xue Xiaojun, Yan Laiqing. RESEARCH ON FUZZY CONTROL-BASED INTEGRATED CONTROL STRATEGY FOR HYBRID ENERGY STORAGE PARTICIPATION IN POWER GRID PRIMARY FREQUENCY REGULATION[J]. Acta Energiae Solaris Sinica. 2026, 47(5): 468-478 https://doi.org/10.19912/j.0254-0096.tynxb.2024-2285

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