Berlin 2015 – scientific programme
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DY: Fachverband Dynamik und Statistische Physik
DY 43: Energy Systems and Power Grid (joint session DY/ AK Energy /SOE)
DY 43.1: Talk
Thursday, March 19, 2015, 09:30–09:45, BH-N 243
Decentral Smart Grid Control — •Benjamin Schäfer1, Moritz Matthiae1, Dirk Witthaut1,3,4, and Marc Timme1,2 — 1Network Dynamics, Max Planck Institute for Dynamics and Self-Organization (MPIDS), 37077 Göttingen — 2Institute for Nonlinear Dynamics, Faculty of Physics, University of Göttingen, 37077 Göttingen — 3Forschungszentrum Jülich, Institute for Energy and Climate Research (IEK-STE), 52428 Jülich — 4Institute for Theoretical Physics, University of Cologne, 50937 Köln
Stable operation of complex flow and transportation networks requires balanced supply and demand. For the operation of electric power grids - due to their increasing fraction of renewable energy sources - a pressing challenge is to fit the fluctuations in decentralized supply to the distributed and temporally varying demands. Common smart grid concepts suggest to collect consumer demand data, centrally evaluate them and send price information back to customers. Besides restrictions regarding cyber security, privacy protection and large required investments, it remains unclear how such central smart grid options guarantee overall stability.
Here we propose a Decentral Smart Grid Control, where the price is directly linked to the local grid frequency at each customer. The grid frequency provides all necessary information about the current power balance such that it is sufficient to match supply and demand without the need for a centralized IT infrastructure. We analyze the performance and the dynamical stability of the power grid with such a control system and determine its stability conditions.