Nr 14, May 2013
Current-regulated synchronous alternator mini-CHP plant
Within the project “e-SolCar” two current-regulated mini-CHP plants will be constructed on the campus of BTU Cottbus. The main focus of the research is to balance the fluctuating current supply of renewable energy plants by establishing current-regulated decentralized small-scale generator with elective active and reactive power output.
In a current-regulated system the operation mode is conducted in accordance with the desired power output. The fluctuating heat generated by the drive motor is delivered to a heat storage unit and can be used, for example, for heating or for hot water production. Parallel to this, the current-regulated systems always require an emergency cooler that can release heat effectively into environment in case of the failed heat intake. In order to maximize the overall efficiency, it should aim at a useful heat application... more you can read in the newsletter
Study of the separate grids
To meet the requirements of an energy supply system, grid operators are required to provide the grid infrastructure in accordance with the public supply mandate. With the Renewable Energy Act (EEG German abbreviation) coming into effect and the installation of decentralized renewable energy plants in the grids, new challenges are created for the system operators, which are further amplifying by the so-called turnaround in Energy policy. The infrastructure necessary for the public supply mandate should also aim at integration of EEG systems. This aim is conflicted with the fact that the regions with high EEG infeeds (especially wind) are mostly rural and the grid infrastructure of these areas is not designed for the transportation of large fluctuating energy supplies. The limits of the load capacity of the existing infrastructure can be seen today on the fact that the EEG infeeds must be regularly disconnected from the grid in order to maintain the stable and secure operation of grids... more you can read in the newsletter
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