湖南电力 ›› 2023, Vol. 43 ›› Issue (1): 17-22.doi: 10.3969/j.issn.1008-0198.2023.01.003

• 研究与试验 • 上一篇    下一篇

基于改进虚拟直流电机的混合储能控制研究

白鹏辉, 秦斌, 王欣   

  1. 湖南工业大学电气与信息工程学院,湖南 株洲 412007
  • 出版日期:2023-02-25 发布日期:2023-03-03
  • 基金资助:
    省市联合基金(2022JJSSLH0380)

Research on Hybrid Energy Storage Control Based on Improved Virtual DC Motor

BAI Penghui, QIN Bin, WANG Xin   

  1. School of Electrical and Information Engineering, Hunan University of Technology, Zhuzhou 412007, China
  • Online:2023-02-25 Published:2023-03-03

摘要: 针对直流微电网中负荷和分布式电源功率波动导致母线电压波动的问题,将扩张状态观测器(extended state observer,ESO)引入对虚拟直流电机(virtual direct current motor,VDM)的控制中,提出一种基于改进虚拟直流电机混合储能分频控制(ESO-VDM)方法。对VDM进行小信号建模,分析其惯性时间常数H和阻尼系数D对控制系统的影响并确定两个参数的值。在功率分频的情况下对锂电池采用电流闭环控制,对超级电容采用ESO-VDM控制,增强其惯性和阻尼特性。在Matlab/Simulink环境中进行仿真研究,仿真结果证明了所提控制算法充分利用了混合储能装置的优势,平滑了电池的输出功率,提高了直流母线电压的稳定性。

关键词: 直流微电网, 混合储能, 虚拟直流电机, 扩张状态观测器

Abstract: Aimed at the problem of bus voltage fluctuation caused by power fluctuation of load and distributed generation in DC microgrid, an expanded state observer (ESO) is introduced into the virtual DC motor (VDM) control and a hybrid energy storage frequency division control based on improved virtual DC motor (ESO-VDM) is proposed . Small signal modeling for VDM is conducted, the influence of inertia time constant H and damping coefficient D on the control system is analyzed, and the values of the two parameters are determined.In the case of power frequency division, the lithium battery is controlled by current closed-loop, and the ultracapacitor is controlled by ESO-VDM to improve its inertia and damping characteristics. The simulations with Matlab/Simulink are performed, and the results show that the proposed control algorithm makes full use of the advantages of hybrid energy storage device, smooths the output power of the battery, and improves the stability of the DC bus voltage.

Key words: DC microgrid;hybrid energy storage;virtual DC motor;extended state observer

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