This brief presents a novel estimation scheme for power grids based on distributed observers. Assuming only the generator voltage phase angles are measured and the electrical load active power demands are specified, we design an observer for each bus of the power grid, exploiting only knowledge of local information about the power system. In particular, we propose a super-twisting-like sliding mode observer to estimate the frequency deviation for each generator bus and a so-called algebraic observer to estimate the load voltage phase angle for each load bus based on distributed iterative algorithms. The observer-based estimation scheme is validated by considering the IEEE 39 bus SimPowerSystems model.

中文翻译：

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基于分布式观测器的电网估计方案的设计与验证

本简介提出了一种基于分布式观测器的新颖的电网估计方案。假设仅测量发电机电压相角并指定了电气负载有功功率需求，我们将仅利用有关电力系统的本地信息来为电网的每个母线设计观察器。特别是，我们提出了一种超扭曲状的滑模观测器来估计每个发电机母线的频率偏差，并提出一个代数观测器来基于分布式迭代算法来估计每个负载母线的负载电压相角。通过考虑IEEE 39总线SimPowerSystems模型来验证基于观察者的估计方案。