TOWARDS THE EXPLICIT DYNAMIC MODELING OF DISTRIBUTION GRIDS IN THE TIME-DOMAIN
Authors
F. Gielnik, F. Mueller, S. de Jongh, M. Pfeifer, M. Suriyah, S. Hohmann, T. Leibfried
Abstract
The majority of monitoring and control applications at a distribution system control center rely on the assumption that the distribution network is in quasi steady-state. Known limitations of the quasi steady-state assumption are its inability to capture fast transients and harmonic distortion. Both of them are induced by the large-scale integration of distributed energy sources (DES) and power electronics. This motivates a dynamic modeling of distribution grids since such an approach naturally obviates the steady-state assumption. In the literature, the dynamic modeling of distribution networks mainly leads to implicit models in forms of differential-algebraic equations (DAEs). In contrast, the explicit modeling in terms of ordinary differential equations (ODEs) has received limited attention. This is a problem as the model-based design of a controller and state estimator usually requires an explicit model. In this paper, we present a first approach towards a dynamic description of an unbalanced distribution grid by an explicit ODE model. A minimal system consisting of two buses and one three-phase three-wire line is considered. The contribution is twofold: first, we propose a time-domain dynamic model for the minimal system in form of an explicit Port-Hamiltonian system; secondly, the dynamic model is validated through experiments. The results show that the dynamic model can deal with both, fast transients and harmonic distortion.
Citation
- Journal: IET Conference Proceedings
- Year: 2021
- Volume: 2021
- Issue: 6
- Pages: 1400–1404
- Publisher: Institution of Engineering and Technology (IET)
- DOI: 10.1049/icp.2021.1493
BibTeX
@article{Gielnik_2021,
title={{TOWARDS THE EXPLICIT DYNAMIC MODELING OF DISTRIBUTION GRIDS IN THE TIME-DOMAIN}},
volume={2021},
ISSN={2732-4494},
DOI={10.1049/icp.2021.1493},
number={6},
journal={IET Conference Proceedings},
publisher={Institution of Engineering and Technology (IET)},
author={Gielnik, F. and Mueller, F. and de Jongh, S. and Pfeifer, M. and Suriyah, M. and Hohmann, S. and Leibfried, T.},
year={2021},
pages={1400--1404}
}