Description
For climate protection and sustainability reasons fossil fuels need to be replaced by renewable energy sources. But even though the amount of renewable generation which is integrated into the electric grids increases continuously, the target of a carbon-free, but still secure and affordable energy system in Germany is still far away. The current approaches are not sufficient; new and grid-friendly integration methods are required. Within this work, these challenges were addressed from both a conceptual and a technical perspective.
The conceptual approach involves the description of electrical power plants by inherent properties which are illustrated in a so-called power generation cube. Based on that, the concept of a Smart renewable Power Plant (SrPP) has been developed: a converter-coupled collector grid for renewable generation with integrated energy storage.
The technical studies of this work include the grid performance and the internal operation of the SrPP and therefore in particular the control and grid-friendly operation of converters. A comprehensive overview of converter control concepts has been developed. Subsequently, the different control modes have been implemented and analysed on a laboratory setup.
Hence, besides introducing the SrPP as a comprehensive grid integration method for renewable energy sources, this work also helps to bring together the fields of electric power systems and of power electronics, which are still separated in many respects, but will be more and more united in the future when moving towards converter dominated renewable power systems.
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