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Online tracking of sub-transient generator model variables using dynamic phasor measurements

机译:使用动态相量测量值在线跟踪次暂态发电机模型变量

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摘要

In this article, we present a new formulation of the existing synchronous generator models based on phasor measurement data. The proposed sub-transient model allows to estimate the dynamic state variables as well as to calibrate model parameters in real time. This model makes a more efficient use of the information gathered at the multi-functional digital fault recorders (DFRs) and phasor measurement units (PMUs), which are becoming widely available in power grids. In particular, we include in our model the measurements of frequency, rate of change of frequency, and phasor derivatives. Using standard non-linear estimation techniques, we calibrate the inertia constant and generator reactances by considering a synchronous machine with different mechanical power controls. Additionally, we test the performance of this method under multiple power system disturbances such as line-to-ground faults, line loss, load loss, etc.
机译:在本文中,我们提出了一种基于相量测量数据的现有同步发电机模型的新公式。所提出的子瞬态模型允许估计动态状态变量以及实时校准模型参数。该模型可以更有效地利用在多功能数字故障记录器(DFR)和相量测量单元(PMU)上收集的信息,这些功能已在电网中广泛使用。特别是,我们在模型中包括了频率,频率变化率和相量导数的度量。使用标准的非线性估计技术,我们通过考虑具有不同机械功率控制的同步电机来校准惯性常数和发电机电抗。此外,我们在多种电力系统干扰(例如线对地故障,线损耗,负载损耗等)下测试了该方法的性能。

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