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DY: Fachverband Dynamik und Statistische Physik

DY 38: The Physics of Power-Grids – Fluctuations, Synchronization and Network Structures (Focus session, joint DY/SOE)

DY 38.5: Vortrag

Mittwoch, 22. März 2017, 16:15–16:30, ZEU 160

From conventional to renewable power: the role of grid heterogeneities — •Pedro Lind, Philipp Maass, Christoph Schiel, and Matthias Wolff — Universität Osnabrück, Fachbereich Physik, Barbarastraße 7, 49076 Osnabrück, Germany

The influence of heterogeneities characterizing transmission lines and generators on the functioning of power grids is investigated, focusing on the situation where conventional power plants are replaced by renewable power sources.Two problems are addressed.

First, we study the probability of single line failure [1], showing that it is necessary to consider the maximum power at the generator where renewable power is injected into the grid, the mean injected power and operating time scales of human intervention. We derive a formula for the failure probability that incorporates all these three aspects as well as simple parameters characterizing the wind statistics at the envisaged injection node. Our derivation is based on empirical sets taken at the North Sea.

Secondly, we report on simulations of the time-dependent power flow in grids [2], where power input from a fraction of the generator nodes is fluctuating and follows stochastic dynamics mimicking statistical features of wind and solar power injection. Different measures of the grid stability are discussed, as, for example, frequency stability and phase synchronization.

[1] S. Backhaus and M. Chertkov, Phys. Today 66, 42-48 (2013).

[2] T. Nishikawa and A. E. Motter, New J. Phys. 17, 015012 (2015).