DocumentCode :
2544210
Title :
Virtual synchronous generators
Author :
Driesen, J. ; Visscher, K.
Author_Institution :
Dept. of Electr. Eng., Katholieke Univ. Leuven, Leuven
fYear :
2008
fDate :
20-24 July 2008
Firstpage :
1
Lastpage :
3
Abstract :
In electricity grids the frequency of the voltage is stabilized by a combination of the rotational inertia (rotating mass) of synchronous power generators in the grid and a control algorithm acting on the rotational speed of a number of major synchronous power generators. When in future small non-synchronous generation units replace a significant part of the synchronous power generation capacity, the total rotational inertia of the synchronous generators is decreased significantly. This causes large frequency variations that can end up in an unstable grid. A way to stabilize the grid frequency is to add virtual rotational inertia to the distributed generators. A virtual inertia can be attained for any generator by adding a short-term energy storage to it, combined with a suitable control mechanism for its power electronics converter. In this way a generator can behave like a ldquoVirtual Synchronous Generatorrdquo (VSG) during short time intervals, and contribute to stabilization of the grid frequency.
Keywords :
machine vector control; power convertors; power electronics; synchronous generators; control algorithm; control mechanism; power electronics converter; short-term energy storage; synchronous power generators; virtual rotational inertia; virtual synchronous generators; voltage stability; Distributed power generation; Energy storage; Frequency; Mesh generation; Power electronics; Power generation; Power grids; Synchronous generators; Voltage control; Weight control; Distributed generation; distributed energy resources; microgrids; synchronous generators;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Power and Energy Society General Meeting - Conversion and Delivery of Electrical Energy in the 21st Century, 2008 IEEE
Conference_Location :
Pittsburgh, PA
ISSN :
1932-5517
Print_ISBN :
978-1-4244-1905-0
Electronic_ISBN :
1932-5517
Type :
conf
DOI :
10.1109/PES.2008.4596800
Filename :
4596800
Link To Document :
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