Small signal stability analysis and control parameter optimization of DC microgrid cluster

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2024-07-04 DOI:10.1049/pel2.12692

Zifan Zhang, Xiangyu Yang, Shiwei Zhao, Qi Zeng, Zhanhong Liang, Mengzhen Gao

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Abstract

Direct current microgrid (DCMG) clusters are gaining popularity in power systems due to their simplicity and high efficiency. However, DCMG clusters are susceptible to minor disturbances due to low system inertia. This paper proposes a method to enhance the small-signal stability of a DCMG cluster by optimizing the main control parameters of the system. This paper presents a small-signal state-space model of a DCMG cluster system at the system level, considering a multi-bus network topology. Then, the control parameters that significantly affect the small-signal stability of the DCMG are selected using the participation factor method. To enhance the system damping, the Pareto-optimal frontier of the bi-objective problem was determined using the elite non-dominated sorting genetic algorithm (NSGA-II). The optimal compromise is determined by using the fuzzy membership function method to extract it from the generated Pareto optimal front. The proposed method has been verified on a three-sub DCMG test system with droop control.

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直流微电网群的小信号稳定性分析与控制参数优化

直流微电网（DCMG）集群因其简单、高效而在电力系统中越来越受欢迎。然而，由于系统惯性小，DCMG 群集容易受到微小干扰的影响。本文提出了一种通过优化系统主要控制参数来增强 DCMG 电网群小信号稳定性的方法。考虑到多总线网络拓扑结构，本文在系统层面给出了 DCMG 集群系统的小信号状态空间模型。然后，利用参与因子法选出了对 DCMG 小信号稳定性影响较大的控制参数。为增强系统阻尼，使用精英非支配排序遗传算法（NSGA-II）确定了双目标问题的帕累托最优前沿。使用模糊成员函数方法从生成的帕累托最优前沿中提取最优折衷方案。所提出的方法已在带下垂控制的三子 DCMG 测试系统上得到验证。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.