Handling Initial Conditions in Vector Fitting for Real Time Modeling of Power System Dynamics

Tommaso Bradde, Samuel Chevalier*, Marco De Stefano, Stefano Grivet-Talocia, Luca Daniel

*Corresponding author for this work

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Abstract

This paper develops a predictive modeling algorithm, denoted as Real-Time Vector Fitting (RTVF), which is capable of approximating the real-time linearized dynamics of multi-input multi-output (MIMO) dynamical systems via rational transfer function matrices. Based on a generalization of the well-known Time-Domain Vector Fitting (TDVF) algorithm, RTVF is suitable for online modeling of dynamical systems which experience both initial-state decay contributions in the measured output signals and concurrently active input signals. These adaptations were specifically contrived to meet the needs currently present in the electrical power systems community, where real-time modeling of low frequency power system dynamics is becoming an increasingly coveted tool by power system operators. After introducing and validating the RTVF scheme on synthetic test cases, this paper presents a series of numerical tests on high-order closed-loop generator systems in the IEEE 39-bus test system.
Original languageUndefined/Unknown
Article number2471
JournalEnergies
Volume14
Number of pages21
ISSN1996-1073
DOIs
Publication statusPublished - 2021

Keywords

  • Power system dynamics
  • Real-time modeling
  • Vector Fitting

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