Aspects of Grid Integration of Renewable Energy Sources in Weak Power Systems
Conference: Internationaler ETG-Kongress 2013 – Energieversorgung auf dem Weg nach 2050 - Symposium 1: Security in Critical Infrastructures Today
11/05/2013 - 11/06/2013 at Berlin, Deutschland
Proceedings: Internationaler ETG-Kongress 2013 – Energieversorgung auf dem Weg nach 2050
Pages: 7Language: englishTyp: PDF
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Authors:
Grunau, Soenke; Reese, Jan; Jessen, Lars; Fuchs, Friedrich W. (Christian-Albrechts-University of Kiel, Technical Faculty, Institute for Power Electronics and Electrical Drives, Kaiserstr. 2, 24143 Kiel, Germany)
Abstract:
In this paper some special aspects of grid integration of renewable energy systems (RES) and improving system behavior under weak grid conditions are analyzed. At first a principle to measure frequency dependent grid impedances by current injection is explained and field measurements are presented. Secondly, the economic efficiency of short time energy storage systems for wind turbines (WT) is under investigated. With these systems it is possible to provide additional active power to support the grid to maintain stable and it is shown that economical advantages for WT operators can be achieved. Finally the system response of an electric grid with RES at transient faults is presented and optimized. The key aspect is the reactive power exchange between different energy resources and the grid during grid faults. Results show that damping this power exchange is possible by modeling and adapting the synchronization algorithm.