RESEARCH ON VOLTAGE REGULATION CONTROL OF DC MICROGRID BASED ON VIRTUAL INERTIA AND DAMPING PARAMETERS’ADAPTIVE STRATEGY

被引：0
|
作者：
Zuo Y. [1 ]
Wang D. [1 ]
Zhou X. [2 ]
Li J. [1 ]
Hu J. [1 ]
Lu J. [1 ]
机构：
[1] School of Electrical Engineering, Southwest Jiaotong University, Chengdu
[2] Yunnan Power Grid Co.，Ltd., Electric Power Research Institute, Kunming
来源：
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | 2023年 / 44卷 / 11期
关键词：
adaptive control systems; DC system; microgrids; small signal analysis; virtual inertia and damping; voltage control;
D O I：
10.19912/j.0254-0096.tynxb.2022-1040
中图分类号：
学科分类号：
摘要：
The DC microgrid with high-power wind and solar energy storage has the typical characteristics of small inertia，weak damping". After the system is disturbed，it will cause the DC bus voltage to fluctuate violently. Therefore，this paper proposes an adaptive control strategy to improve the virtual inertia and damping parameters. Firstly，a voltage compensation link is added to the control of similar virtual synchronous generator to eliminate the voltage regulation static error caused by the control. Then the virtual inertia and damping parameters are made to respond to the DC voltage fluctuation adaptively，and the influence of the output power limitation of the converter is considered in the adaptive control of the virtual inertia，which not only suppresses the DC voltage fluctuation，but also takes into account the long-term safe operation of the converter. In order to ensure the reasonable selection of control parameters，this paper establishes a small signal analysis model of the control strategy，and analyzes the influence of the main parameters on the stability of the system by drawing the root locus diagram. Finally，the effectiveness of the improved control strategy proposed in this paper is verified by a simulation example. © 2023 Science Press. All rights reserved."
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页码：485 / 494
页数：9
相关论文
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