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K. Edelmoser, F. Himmelstoß:
"Battery Buffered Multi Filter Stage Solar Inverter";
Vortrag: WSEAS International Conference on Circuits,Systems,Communications and Computers CSCC, Corfu Island, Greece; 14.07.2011 - 16.07.2011; in: "Proceedings of the 15th WSEAS International Conference on Circuits, Systems, Communications and Computers CSCC '11", (2011), ISBN: 978-1-61804-017-6; S. 106 - 112.

In the field of electrical solar power conversion efficiency is the most important topic. Also the elimination of high frequency ripple on input- and output side is an increasingly important topic. In common single-phase inverter applications the current of the solar array shows a remarkable ripple due to power pulsation on the grid. This entails two significant disadvantages: Reduced over-all efficiency due to dynamic maximum power point mismatch and reduced lifetime of the panels due to additional component stress. Furthermore in environments with several solar strings operating in parallel to reach the goal of a very close MPP operation, a distributed current source arrangement has to be chosen. On the other hand, several measurements have also to be taken into consideration to keep the output-harmonics in an acceptable range. The proposed topology discussed in this paper uses separated active filters to fulfil the given requirements: Minimized input current ripple of the cells, string-optimized maximum power point tracking and optimal power quality of the supplying grid. The topology presented in this paper shows a remarkable improvement of the over-all efficiency as well as a significantly enhanced EMC. Consequently, it is well suited for solar power inverter applications.

http://publik.tuwien.ac.at/files/PubDat_203949.doc