Low-frequency oscillation analysis of DC-link voltage-synchronized grid-forming converters: A damping torque perspective

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

International Journal of Electrical Power & Energy Systems Pub Date : 2025-09-19 DOI:10.1016/j.ijepes.2025.111081

Song Chen , Yang Wang , Mengling Yang , Zhen Tian , Josep M. Guerrero

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引用次数: 0

Abstract

The grid-forming (GFM) converter based on DC voltage synchronization effectively maintains stability on the DC side. However, the addition of a DC voltage control (DVC) loop introduces complexity into the low-frequency oscillation (LFO) characteristics. With numerous DVC loop designs developed to date, understanding LFO characteristics across different configurations has become increasingly challenging, further complicating the development of effective mitigation strategies. This paper provides a unified and comprehensive LFO analysis of various DC-link voltage-synchronized GFM (DC-GFM) converters from the perspective of damping torque. The power angle dynamics of these DC-GFM are formulated and examined through damping and synchronization torques, revealing key parameters that contribute to negative torque. These insights support the design of effective countermeasures for diverse DC-GFM converter types.

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直流链路电压同步并网变流器的低频振荡分析：阻尼转矩视角

基于直流电压同步的成网变换器能有效地保持直流侧的稳定。然而，直流电压控制（DVC）环路的加入给低频振荡（LFO）特性带来了复杂性。到目前为止，已经开发了许多DVC环路设计，了解不同配置的LFO特性变得越来越具有挑战性，这进一步使有效缓解策略的开发复杂化。本文从阻尼转矩的角度对各种直流链路电压同步式GFM （DC-GFM）变换器进行了统一、全面的LFO分析。通过阻尼和同步转矩对直流- gfm的功率角动力学进行了阐述和分析，揭示了导致负转矩的关键参数。这些见解支持为各种DC-GFM转换器类型设计有效的对策。

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.