BATTERY ENERGY STORAGE CONVERTER BASED ON PARTIAL POWER CONVERSION STABILITY ANALYSIS

Wu Yucheng; Jing Long; Song Guanghui; Sun Ruidong; Liu Qian; Wu Xuezhi

doi:10.19912/j.0254-0096.tynxb.2023-1464

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (1) : 269-278. DOI: 10.19912/j.0254-0096.tynxb.2023-1464

BATTERY ENERGY STORAGE CONVERTER BASED ON PARTIAL POWER CONVERSION STABILITY ANALYSIS

Wu Yucheng¹, Jing Long¹, Song Guanghui², Sun Ruidong¹, Liu Qian¹, Wu Xuezhi¹

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Abstract

In order to improve the efficiency and safety of battery energy storage system, an energy storage optimization scheme based on partial power conversion （PPC） technology is proposes in this paper. Due to the coupling effect between the battery series end and the bus end in the series part power converter structure, impedance modeling of this topology is fully considered this influence to provide a theoretical basis for system stability analysis. Aiming at the instability of the system under the condition of battery discharge, by performing system control diagram equivalence transformation, an input voltage feedforward control-based energy storage converter impedance reshaping control strategy is proposed to improve the stability of the battery energy storage system. This strategy can meet the stability requirement of matching the system impedance without affecting the closed-loop dynamic of the converter. Finally, the system simulation is completed, the experimental platform is built to verify the validity and practicability of the proposed energy storage converter scheme and control method.

Key words

partial power conversion / impedance modeling / stability analysis / impedance reshaping

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Wu Yucheng, Jing Long, Song Guanghui, Sun Ruidong, Liu Qian, Wu Xuezhi. BATTERY ENERGY STORAGE CONVERTER BASED ON PARTIAL POWER CONVERSION STABILITY ANALYSIS[J]. Acta Energiae Solaris Sinica. 2025, 46(1): 269-278 https://doi.org/10.19912/j.0254-0096.tynxb.2023-1464

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