Forced oscillations in power systems can lead to disruptive large oscillations across the grid when resonating with inter-area system modes. This letter proposes a rigorous method for estimating the overall impact of a forced oscillation when the forced oscillation frequency is close to the frequencies of multiple system modes. Apart from providing analytical insight, the method is shown to be useful in offline analysis of forced oscillations in large-scale power system models and in measurement-based analysis.

中文翻译：

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强制振荡与多种系统模式的相互作用

当与区域间系统模式共振时，电力系统中的强迫振荡会导致整个电网的破坏性大振荡。这封信提出了一种严格的方法，用于在受迫振荡频率接近多个系统模式的频率时估算受迫振荡的整体影响。除了提供分析洞察力之外，该方法还被证明可用于大规模电力系统模型中强迫振荡的离线分析和基于测量的分析。