提高并网逆变器同步稳定性的暂态切换方法

IF 4.2 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Electric Power Systems Research Pub Date : 2025-07-28 DOI:10.1016/j.epsr.2025.112038

Zeyu Xie, Dongyuan Qiu, Bo Zhang, Yanfeng Chen

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引用次数: 0

摘要

电网电压暂降条件下并网逆变器的同步稳定性是维持电力系统稳定运行的一个重要问题。现有的研究大多侧重于有功控制回路的优化，而忽略了无功控制回路的影响。事实上，在瞬态响应过程中，APCL和RPCL实际上是耦合的。为了提高GFM逆变器的同步稳定性，本文在RPCL中引入了一种暂态切换方法，在暂态期间将RPCL切换到恒压控制状态。首先描述了该方案的动力学特性，该方案具有大信号模型的特点。随后，使用相位画像详细描述了潜在的稳定性机制。结果表明，在暂态过程中，恒定的输出电压不仅可以拓宽功率角的稳定区域，而且可以减小频率偏差。最后用实验结果验证了理论分析的正确性。

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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Transient switching method for enhancing the synchronization stability of grid-forming inverters

The synchronization stability of grid-forming (GFM) inverters under grid voltage sag is an important issue for maintaining stable operation in the power system. Most existing work pays more attention to the optimization of the active power control loop (APCL), ignoring the influence of the reactive power control loop (RPCL). In fact, APCL and RPCL are practically coupled during transient response. In this paper, a transient switching method is introduced to the RPCL, which switches the RPCL to constant voltage control during transient periods, with the aim of improving the synchronization stability of GFM inverters. The dynamics of the proposed scheme is first described, which is characterized by a large-signal model. Subsequently, the underlying stability mechanisms are detailed using phase portraits. It is demonstrated that a constant output voltage during the transient process not only broadens the stability region of the power angle but also offers a diminishment of the frequency deviation. Finally, experimental results are provided to verify the theoretical analysis.

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来源期刊

Electric Power Systems Research 工程技术-工程：电子与电气

CiteScore

7.50

自引率

17.90%

发文量

963

审稿时长

3.8 months

期刊介绍： Electric Power Systems Research is an international medium for the publication of original papers concerned with the generation, transmission, distribution and utilization of electrical energy. The journal aims at presenting important results of work in this field, whether in the form of applied research, development of new procedures or components, orginal application of existing knowledge or new designapproaches. The scope of Electric Power Systems Research is broad, encompassing all aspects of electric power systems. The following list of topics is not intended to be exhaustive, but rather to indicate topics that fall within the journal purview. • Generation techniques ranging from advances in conventional electromechanical methods, through nuclear power generation, to renewable energy generation. • Transmission, spanning the broad area from UHV (ac and dc) to network operation and protection, line routing and design. • Substation work: equipment design, protection and control systems. • Distribution techniques, equipment development, and smart grids. • The utilization area from energy efficiency to distributed load levelling techniques. • Systems studies including control techniques, planning, optimization methods, stability, security assessment and insulation coordination.