含混合储能直流微电网混合势函数建模及稳定性分析
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1.河南理工大学电气工程与自动化学院;2.都灵理工大学能源系,都灵

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A

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国家自然科学基金项目(面上项目,重点项目,重大项目)


Hybrid potential function modeling and stability analysis of DC microgrid with hybrid energy storage
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    摘要:

    针对含恒功率负荷的混合储能直流微电网大扰动稳定性问题,在推导混合储能(hybrid energy storage system, HESS)脉宽调制开关网络等效模型基础上,提出了一种基于混合势函数理论的含HESS直流微电网稳定性判据及分析方法。首先,计及HESS充放电特性,将含HESS直流微电网系统的工作状态划分为buck和boost工作模式;接着,分别建立上述两种工作模式下基于脉宽调制开关网络等效模型的直流微电网系统混合势函数模型;最后,应用混合势函数理论第3稳定性定理,分别推导得到buck和boost工作模式下的直流微电网大扰动稳定性判据。该判据给出了各变换器控制参数的稳定运行限制条件。仿真验证了所提稳定性分析方法的准确性以及混合势函数判据的有效性。

    Abstract:

    Aiming at the large disturbance stability problem of hybrid energy storage DC microgrid with constant power load, based on deducing the equivalent model of hybrid energy storage system (HESS) PWM switching network, A stability criterion and analysis method of DC microgrid containing HESS based on mixed potential function theory is proposed. Firstly, considering the charge-discharge characteristics of HESS, the operating states of the DC microgrid system containing HESS are divided into buck and boost operating modes. Then, the hybrid potential function models of DC microgrid system based on the equivalent model of pulse width modulated switching network are established respectively under the above two operating modes. Finally, using the third stability theorem of the mixed potential function theory, the large disturbance stability criteria of the DC microgrid under buck and boost operating modes are derived respectively. The criterion provides the stable operation restriction conditions of each converter control parameter. The accuracy of the proposed stability analysis method and the validity of the mixed potential function criterion are verified by simulation.

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历史
  • 收稿日期:2023-01-27
  • 最后修改日期:2023-03-13
  • 录用日期:2023-03-13
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