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Illustration of an analytical method for selecting signals and locations for power system modal-estimators

机译：为电力系统模态估计器选择信号和位置的分析方法的图解

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For the purposes of planning it is necessary to determine, in a transmission system, which are the best signals for estimating the parameters of the electromechanical modes, given the characteristics of the modal estimator. Closed-form mathematical expressions are derived in another paper for the Power Spectral Densities (PSDs) of the candidate signals at selected locations due to random fluctuations in the system loads. The expressions for the PDSs comprise the separate identifiable contributions of every system mode to the PSD of the signal within a specified frequency band. Also, an expression has been derived which provides a measure of the contribution of the mode to the PSD. The measure is called the Modal Power Contribution which reveals the suitability of a given signal for modal estimation, especially when modes are closely-spaced. The paper demonstrates the practical application of the theoretical analysis.
机译：为了进行规划，有必要在给定模态估计器特性的情况下，在传输系统中确定哪些是用于估计机电模式参数的最佳信号。在另一篇论文中，由于系统负载的随机波动，针对选定位置的候选信号的功率谱密度（PSD）导出了闭式数学表达式。 PDS的表达式包括每种系统模式对指定频段内信号PSD的单独可识别贡献。而且，已经导出了一种表达式，该表达式提供了该模式对PSD的贡献的量度。该度量称为模态功率贡献，它揭示了给定信号对模态估计的适用性，特别是在模式间隔很近的情况下。本文论证了理论分析的实际应用。

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