可再生能源并网电力系统中的受激振荡——第一部分：机理与分析方法
Stimulated Oscillations in Renewable Energy Integrated Power Systems - Part I : Mechanism and Analysis Methods
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中文总结 AI 辅助
本文探究可再生能源并网电力系统的受激振荡机理，提出新分析方法，构建适用于该系统的受激振荡理论框架，其成果是对经典稳定性理论的超越。
中文摘要 AI 辅助
振荡是电力系统长期面临的关键问题，尤其是近二十年来，随着可再生能源大规模并网，振荡问题对电力系统的安全运行构成了严重威胁。然而，现有文献尚未完全阐明可再生能源并网电力系统（REIPSs）的振荡机理。本文探究了受激振荡的潜在机理，并提出了新的分析方法：首先，从数学公式和物理解释两方面说明，对于由一对复共轭极点表征的振荡模式，扰动下的振荡风险取决于复平面上该极点与所有其他极点、零点的相对位置关系，而非它们的单独位置，即经典理论所感知的稳定性；随后阐明了极点靠近时即使受轻微扰动也会引发高幅值振荡的潜在机理；在此基础上，提出了适用于REIPSs的受激振荡理论框架，涵盖其定义、机理及方法；最后，本文探讨了本文提出的受激振荡理论与经典基于稳定性的理论之间的关系，揭示研究成果是对经典理论的超越而非否定。
英文摘要
Oscillation is a critical issue that power systems have long faced. Especially over the past two decades, with the large-scale inte-gration of renewable energy into the grid, oscillation problems have posed a serious threat to the secure operation of power systems. However, the current literature has not fully explained the oscillation mechanism of renewable energy integrated power systems (REIPSs). In this paper, the underlying mechanism of stimulated oscillations is explored, with novel analytical methods proposed. Firstly, it is explained from both mathematical formu-las and physical interpretations that for an oscillation mode characterized by a pair of complex conjugate poles, the oscilla-tion risk under disturbance depends on the relative positional relationship between the corresponding poles and all other poles and zeros on the complex plane, rather than their standalone locations, i.e., the stability perceived by classical theory. Then the underlying mechanism of high amplitude oscillations induced by closely-located poles under even slight disturbance is clarified. On this basis, a theoretical framework for stimulated oscilla-tions applicable to REIPSs, covering its definition, mechanism, and methods, is proposed. Finally, this paper discusses the rela-tionship between the stimulated oscillation theory proposed herein and the classical stability-based theory, revealing that the research findings surpass rather than negate the classical theo-ries.
