直流微电网储能变流器动态下垂控制研究

王亚旭; 宋维功; 李勇军; 王春强

doi:10.16513/j.2096-2185.DE.2106014

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分布式能源 ›› 2021, Vol. 6 ›› Issue (2) : 61-67. DOI: 10.16513/j.2096-2185.DE.2106014

学术研究

直流微电网储能变流器动态下垂控制研究

作者信息 +

Research on Dynamic Droop Control of Energy Storage Converter in DC Microgrid

Author information +

文章历史 +

摘要

考虑直流微电网功率分配和母线稳定性问题，提出一种基于储能电池荷电状态(state of charge，SOC)的储能变流器动态下垂控制方法，通过在下垂控制系数中引入储能电池实时SOC值，使负荷差额功率在并联储能电池之间根据自身SOC值进行动态分配，实现功率输出和SOC的均衡；并通过增加直流母线电压二次控制和补偿虚拟阻抗，抑制下垂控制引起的直流母线电压偏离，改善直流变流器的阻尼特性，提升直流母线电压的动态稳定性。通过Matlab/Simulink仿真对控制参数进行分析，验证了所提控制策略的正确性。

Abstract

Considering the power distribution and bus stability of DC microgrid, a dynamic droop control method of energy storage converter based on the state of charge of energy storage battery was proposed. By introducing the real-time SOC value of energy storage battery into the droop control coefficient, the load differential power was distributed among the parallel energy storage batteries according to their own SOC value, so as to realize the balance of power output and SOC secondary control of DC bus voltage and compensation of virtual impedance can restrain DC bus voltage deviation caused by droop control, improve damping characteristics of DC converter and enhance dynamic stability of DC bus voltage. The control parameters were analyzed by Matlab/Simulink simulation, and the correctness of the proposed control strategy was verified.

导出引用

王亚旭, 宋维功, 李勇军, 等. 直流微电网储能变流器动态下垂控制研究[J]. 分布式能源. 2021, 6(2): 61-67 https://doi.org/10.16513/j.2096-2185.DE.2106014

Yaxu WANG, Weigong SONG, Yongjun LI, et al. Research on Dynamic Droop Control of Energy Storage Converter in DC Microgrid[J]. Distributed Energy Resources. 2021, 6(2): 61-67 https://doi.org/10.16513/j.2096-2185.DE.2106014

中图分类号： TM46

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