发表机构
University of Cambridge（剑桥大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
针对可再生能源并网，提出基于频域局部条件的分散式稳定性框架，支持即插即用，推广现有结果，并在9母线案例中验证，降低保守性。
AI 中文摘要
交流电力系统中可再生能源的兴起，要求小信号稳定性评估方法不再依赖集中式、全系统模型。在本两部分的论文中，我们提出了一种基于频域条件的分散式稳定性框架，这些条件施加于局部子系统（其中许多具有等效的图形解释），共同隐含整个电网的稳定性。该框架推广了许多先前报道的结果，通过施加条件的额外自由度、跨频率范围混合条件的能力、对将母线与其连接线路和负载耦合的扩展子系统的条件，以及纳入不稳定子系统的方法，提供了增加的灵活性和即插即用兼容性。详细的异构设备和线路模型在频域中通过阻抗、导纳和潮流模型得到容纳，使该框架适合作为电网规范的基础，这些规范在逆变器主导的电网中实现即插即用功能。第一部分侧重于稳定的阻抗和导纳表示，第二部分将结果扩展到不稳定子系统，这些子系统被证明在许多电网模型中根本存在。第一部分的成果在一个修改的9母线案例研究中得到验证，展示了所提出方法的降低保守性和重要性。
英文摘要
The rise of renewable generation in AC power systems calls for small-signal stability assessment methods that do not rely on centralised, system-wide models. In this two-part paper, we present a decentralised stability framework based on frequency-domain conditions imposed on local subsystems (many admitting equivalent graphical interpretations) which collectively imply the stability of the entire grid. The framework generalises many previously reported results, with added flexibility and plug-and-play compatibility provided by the additional degrees of freedom of the imposed conditions, the ability to mix conditions across frequency ranges, conditions on extended subsystems that couple buses to their connecting lines and loads, and a method to incorporate unstable subsystems. Detailed, heterogeneous device and line models are accommodated in the frequency domain using impedance, admittance, and power-flow models, making the framework suitable as a foundation for grid codes that enable plug-and-play functionality in inverter-dominated grids. Part I focuses on stable impedance and admittance representations and Part II extends the results to unstable subsystems, which are shown to be fundamentally present in many grid models. The results of Part I are validated on a modified 9-bus case study, demonstrating the reduced conservatism and significance of the proposed approach.
Comments15 pages, 10 figures
