Equivalent circuit model of grid-forming-converter based power grids: Visualizing control loop interactions on synchronization stability

IF 5 2区工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

International Journal of Electrical Power & Energy Systems Pub Date : 2025-04-24 DOI:10.1016/j.ijepes.2025.110692

Saizhao Yang , Rui Ma , Jinyu Wen , Shijie Cheng

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引用次数: 0

Abstract

For grid-forming (GFM) converter-based power grids, the impacts of AC voltage control (ACVC) loops on small-signal synchronization stability are rarely discussed in literature. To present the interactions between the synchronization control loop and the ACVC loop in an intuitive and clear approach, this paper establishes the equivalent circuit model of multi-GFM-converter based power systems, and analyzes the impacts of control loop interactions on small-signal synchronization stability. Firstly, the model of multi-GFM converter-based power grids has been established that incorporates the ACVC loop. Then, for the further visualization of control loop interactions, equivalent circuits of the whole systems are derived by the analogy-based method. This analysis allows us to assess the impacts of the ACVC on small-signal synchronization stability. This paper illustrates that ACVC can be equivalently represented as a negative impedance in parallel with the filter inductor. In this case, the ACVC brings about negative damping effects and deteriorates small-signal synchronization stability. Furthermore, the control parameters of the ACVC on small-signal synchronization stability are also quantitatively evaluated. Additionally, interactions between different GFM converters on small-signal synchronization stability are also investigated. Finally, the modified IEEE 10-GFM-converter 39-bus system is built in MATLAB/Simulink platform to validate analyzes and the proposed method.

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基于并网变换器的电网等效电路模型：同步稳定性上控制回路相互作用的可视化

对于基于并网变流器的电网，交流电压控制回路对小信号同步稳定性的影响很少被文献讨论。为了直观、清晰地呈现同步控制回路与ACVC回路之间的相互作用，本文建立了基于多gfm变换器的电力系统等效电路模型，并分析了控制回路相互作用对小信号同步稳定性的影响。首先，建立了包含ACVC环的多gfm变换器电网模型。然后，为了进一步可视化控制回路的相互作用，采用基于类比的方法推导了整个系统的等效电路。这种分析使我们能够评估ACVC对小信号同步稳定性的影响。本文说明ACVC可以等效地表示为与滤波器电感并联的负阻抗。在这种情况下，ACVC带来了负阻尼效应，降低了小信号同步稳定性。此外，还定量评价了ACVC控制参数对小信号同步稳定性的影响。此外，还研究了不同GFM转换器之间的相互作用对小信号同步稳定性的影响。最后，在MATLAB/Simulink平台上构建了改进后的IEEE 10- gfm转换器39总线系统，对分析结果和提出的方法进行了验证。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Electrical Power & Energy Systems 工程技术-工程：电子与电气

CiteScore

12.10

自引率

17.30%

发文量

1022

审稿时长

51 days

期刊介绍： The journal covers theoretical developments in electrical power and energy systems and their applications. The coverage embraces: generation and network planning; reliability; long and short term operation; expert systems; neural networks; object oriented systems; system control centres; database and information systems; stock and parameter estimation; system security and adequacy; network theory, modelling and computation; small and large system dynamics; dynamic model identification; on-line control including load and switching control; protection; distribution systems; energy economics; impact of non-conventional systems; and man-machine interfaces. As well as original research papers, the journal publishes short contributions, book reviews and conference reports. All papers are peer-reviewed by at least two referees.