Research on improved droop control strategy of DC microgrid based on superimposed frequency

被引：0
|
作者：
Xue Y. [1 ]
Huang X. [1 ]
Xi D. [1 ]
Chen Y. [1 ]
Ding Z. [1 ]
机构：
[1] School of Automation Engineering, Shanghai University of Electric Power, Shanghai
来源：
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | 2022年 / 43卷 / 09期
关键词：
Distributed generators; Improved droop controls; Microgrids; Virtual resistance;
D O I：
10.19912/j.0254-0096.tynxb.2021-0248
中图分类号：
学科分类号：
摘要：
This paper proposes an improved droop control strategy for DC microgrid based on superimposed frequency. First, the AC voltage is superimposed on the output voltage of the converter to construct the droop characteristics between the AC voltage frequency and the output current. At the same time, the reactive power generated by the AC voltage is used to adjust the output voltage of each DG converter to achieve accurate current distribution; Then, through the introduction of virtual resistance and voltage secondary compensation measures, the bus voltage is restored and the system stability is improved. This control strategy does not require a communication network, and effectively improves the plug- and- play performance of the microgrids. Finally, the feasibility and effectiveness of the control strategy are verified through simulation. © 2022, Solar Energy Periodical Office Co., Ltd. All right reserved.
引用
收藏
页码：461 / 467
页数：6
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