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Finite-Time Estimation of Time-Varying Frequency Signals in Low-Inertia Power Systems

  • The ongoing and unprecedented transformation of power systems leads to a reduction in the number of conventional power plants, which are the classical actuators of the grid. In addition, this development results in a decreasing system inertia, which is expected to yield faster frequency dynamics. Therefore power-electronics-interfaced units have to take over system control tasks and, in particular, frequency control. For this purpose, accurate and fast estimation algorithms for time-varying frequency signals are needed. Motivated by this fact, we propose a time-varying parameter estimator and a tuning criterion, which for sufficiently small initial estimation errors allows to reconstruct the time-varying frequency signal of a symmetric three-phase waveform in finite time. The proposed estimator is derived by using a time-varying version of the super twisting algorithm and its performance is illustrated via numerical examples.

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Metadaten
Author: Juan Gustavo-Escobedo, Jaime A. Moreno, Johannes SchifferORCiD
DOI:https://doi.org/10.23919/ECC.2019.8795926
Title of the source (English):8th European Control Conference (ECC)
Document Type:Conference publication peer-reviewed
Language:English
Year of publication:2019
Tag:Power Systems, Frequency Signals, Finite-Time Estimation
First Page:2108
Last Page:2114
Faculty/Chair:Fakultät 3 Maschinenbau, Elektro- und Energiesysteme / FG Regelungssysteme und Netzleittechnik
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