Regensburg 2019 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 19: Complex Systems

DY 19.2: Vortrag

Dienstag, 2. April 2019, 12:00–12:15, H6

Perturbation characteristics of power grid models under stochastic power input — •Matthias Wolff, Pedro Lind, and Philipp Maass — Universität Osnabrück, Barbarastraße 7, 49076 Osnabrück

A higher percentage of electrical power provided by renewable energy sources is accompanied by increasing fluctuations in the power generation. This can have a negative effect on the frequency stability on different time scales ranging from sub-seconds to seasons. There are already studies that address the impact of these fluctuations on short time scales [1,2] as well as in the steady state limit [3].

We provide an extension of these studies by comparing different power grid realizations under a perturbation of the frequency and the power injection. The fluctuating power input is estimated from transforming wind velocities measured at a research platform located in the north sea (FINO1). Our stability analysis includes different treatments of the consumers, different voltage levels, as well as structural properties like internal nodes and the related Kron reduction.

It is shown that the results vary strongly, depending on the modeling level of the grid [4]. Not only the stability assessment can change but also the location of weak spots in the grid.

[1] S. Auer et al., Chaos 27, 127003 (2017).

[2] K. Schmietendorf et al., Eur. Phys. J. B 90, 222 (2017)

[3] C. Schiel et al., Sci. Rep. 7, 11562 (2017)

[4] M. F. Wolff et al., Chaos 28, 103120 (2018).