One of the fundamental concerns in the operation of modern power systems is the assessment of their frequency stability in case of inertia-reduction induced by the large share of power electronic interfaced resources. Within this context, the paper proposes a framework that, by making use of linear models of the frequency response of different types of power plants, including also grid-forming and grid-following converters, is capable to infer a numerically tractable dynamical model to be used in frequency stability assessment. Furthermore, the proposed framework makes use of models defined in a way such that their parameters can be inferred from real-time measurements feeding a classical least squares estimator. The paper validates the proposed framework using a full-replica of the dynamical model of the IEEE 39 bus system simulated in a real-time platform.

现代电力系统运行中的基本问题之一是在由于电力电子接口资源的大量共享而导致惯性降低的情况下评估其频率稳定性。在此背景下，本文提出了一个框架，该框架通过利用不同类型发电厂的频率响应的线性模型（还包括网格形成和网格跟随转换器），可以推断出数值可控的动力学模型为：用于频率稳定性评估。此外，所提出的框架利用以这样一种方式定义的模型，使得可以从馈送经典最小二乘估计器的实时测量中推断出它们的参数。