电池储能系统三相交错型DC-DC变换器控制策略研究

常雨芳; 高鹏; 罗国澳; 张闯闯; 严怀成; 黄文聪

doi:10.19912/j.0254-0096.tynxb.2024-0076

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太阳能学报 ›› 2025, Vol. 46 ›› Issue (5) : 706-715. DOI: 10.19912/j.0254-0096.tynxb.2024-0076

电池储能系统三相交错型DC-DC变换器控制策略研究

常雨芳¹, 高鹏¹, 罗国澳¹, 张闯闯¹, 严怀成², 黄文聪¹

作者信息 +

RESEARCH ON CONTROL STRATEGY OF THREE-PHASE INTERLEAVED DC-DC CONVERTER FOR BATTERY ENERGY STORAGE SYSTEM

Chang Yufang¹, Gao Peng¹, Luo Guoao¹, Zhang Chuangchuang¹, Yan Huaicheng², Huang Wencong¹

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文章历史 +

摘要

针对电池储能系统中直流母线电压易波动以及电池组端电流纹波较大的问题，提出一种电池储能系统三相交错并联双向DC-DC变换器电压电流双环复合控制方法。首先，建立三相交错并联双向DC-DC变换器数学模型；其次，设计电压外环基于有限时间扩张状态观测器的滑模控制方法，通过改进有限时间扩张状态观测器估计出系统总扰动并反馈到滑模控制器进行补偿，可提高系统的响应速度和抗扰动能力；然后，设计电流内环自适应PI均流移相控制方法，将总电流均分并分别控制，可降低电流纹波量；最后，搭建仿真模型和实验平台进行验证，结果表明所提控制方法可有效抑制直流母线电压波动、降低电流纹波量，可提高电池储能系统抗扰动能力和动态响应性能。

Abstract

In response to the issues of voltage fluctuations in the DC bus and significant current ripple at the battery terminal in battery energy storage systems, this paper proposes a voltage and current dual-loop control strategy for the three-phase interleaved parallel bidirectional DC-DC converter of the battery energy storage system. Firstly, a mathematical model of the three-phase interleaved parallel bidirectional DC-DC converter is established. Secondly, a sliding mode control strategy based on a finite-time extended state observer for the voltage outer loop is designed. Through an improved finite-time extended state observer, the total disturbance of the system is estimated and feed it back to the sliding mode controller for compensation, which improves the response speed and disturbance rejection ability of the system. Next, an adaptive PI current sharing and phase shifting control method in the current inner loop is designed, which divides the total current into three equal parts and controls them individually, reducing the amount of current ripple. Finally, a simulation model and experimental platform are built for validation. The results show that the control method proposed in this paper can effectively suppress DC bus voltage fluctuations and reduce current ripple, and improve the disturbance rejection ability and dynamic response performance of the battery energy storage system.

导出引用

常雨芳, 高鹏, 罗国澳, 张闯闯, 严怀成, 黄文聪. 电池储能系统三相交错型DC-DC变换器控制策略研究[J]. 太阳能学报. 2025, 46(5): 706-715 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0076

Chang Yufang, Gao Peng, Luo Guoao, Zhang Chuangchuang, Yan Huaicheng, Huang Wencong. RESEARCH ON CONTROL STRATEGY OF THREE-PHASE INTERLEAVED DC-DC CONVERTER FOR BATTERY ENERGY STORAGE SYSTEM[J]. Acta Energiae Solaris Sinica. 2025, 46(5): 706-715 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0076

中图分类号： TM46

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