Conference paper
Estimation of Oscillatory Mode Activity from PMU Measurements
Norwegian University of Science and Technology1
Department of Electrical Engineering, Technical University of Denmark2
Center for Electric Power and Energy, Centers, Technical University of Denmark3
Electric Power Systems, Center for Electric Power and Energy, Centers, Technical University of Denmark4
We propose a method for estimating the activity of oscillatory modes in power systems. The frequencies and mode shapes of the modes of interest are assumed to be known beforehand, either from linear modal analysis or from empirical mode estimation methods, and are used in combination with measurements from Phasor Measurement Units to estimate the instantaneous mode excitation in terms of amplitude and phase.
The estimation is carried out using non-linear least squares to fit a set of curves to the measured data. Combining mode shapes with measured data allows the activity to be estimated from only a low number of consecutive measurement snapshots, resulting in a problem of low computational complexity that can be solved fast enough for the method to run online.The purpose of estimating the mode activity is, firstly, to contribute to increased situational awareness and facilitate methods that build further upon this information, and secondly, to be able to synthesize signals that can serve as input to controllers for power oscillation damping.
It is expected that using this excitation measure will result in a more robust controller that is less prone to disturbances and noise.
Language: | English |
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Publisher: | IEEE |
Year: | 2020 |
Pages: | 201-205 |
Proceedings: | 2020 IEEE PES Innovative Smart Grid Technologies Europe |
ISBN: | 1728170990 , 1728171008 , 1728171016 , 9781728170992 , 9781728171005 and 9781728171012 |
Types: | Conference paper |
DOI: | 10.1109/ISGT-Europe47291.2020.9248789 |
ORCIDs: | Müller, Daniel and Johannsson, Hjortur |
Empirical modal analysis Non-linear Least Squares Power oscillations Wide area monitoring and control
Current measurement Estimation Oscillators PMU measurements Phasor Measurement Units Phasor measurement units Shape Shape measurement Velocity measurement computational complexity consecutive measurement snapshots damping empirical mode estimation methods excitation measure instantaneous mode excitation least squares approximations linear modal analysis low computational complexity modal analysis mode shapes non-linear least squares nonlinear least squares oscillatory mode activity oscillatory modes phasor measurement power oscillations power system parameter estimation power systems wide area monitoring and control