光伏发电渗透率高的 MMC-MVDC 系统中的低频振荡：建模、机理和评估

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-08-29 DOI:10.1049/pel2.12768

Xiangyang Wu, Lili He, Yang Li, Zhikang Shuai, Ke Zhou

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引用次数: 0

摘要

本研究探讨了高光伏（PV）渗透率的 MMC-MVDC 系统中的低频振荡（LFO）问题，考虑了并网 MMC 的整个运行条件，包括逆变器和整流器模式。首先，建立了变流器和网络的多端口阻抗模型，并在此基础上定义了稳定性标准。然后，利用总线参与分析和参数灵敏度分析确定 LFO 的机理。此外，考虑到并网 MMC 的整个运行条件，还确定了主要参数的稳定区域。有趣的是，锁相环可能会在两个低频范围内引起 LFO。最后，实验结果证实了理论分析的正确性。

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Low-frequency oscillations in MMC-MVDC systems with high PV penetration: Modelling, mechanism, and assessment

This study investigates the low-frequency oscillations (LFOs) in MMC-MVDC systems with high photovoltaic (PV) penetration, considering the whole operating conditions of the grid-connected MMC, including both the inverter and rectifier modes. First, the multi-port impedance models of converters and networks are developed, upon which a stability criterion is defined. The mechanism of LFOs is then identified using bus participation analysis and parameter sensitivity analysis. In addition, the stable zones of the dominant parameters are identified, taking into account the whole operating conditions of the grid-connected MMC. Interestingly, a phase-locked loop may induce LFOs in two low-frequency ranges. Finally, the experimental results confirm the correctness of the theoretical analysis.

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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.