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Multilevel Inverter Topologies for Stand-Alone PV Systems

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3 Author(s)
SÉrgio Daher ; Energy Process. & Control Group, Fed. Univ. of Ceara, Fortaleza ; JÜrgen Schmid ; Fernando L. M. Antunes

This paper shows that versatile stand-alone photovoltaic (PV) systems still demand on at least one battery inverter with improved characteristics of robustness and efficiency, which can be achieved using multilevel topologies. A compilation of the most common topologies of multilevel converters is presented, and it shows which ones are best suitable to implement inverters for stand-alone applications in the range of a few kilowatts. As an example, a prototype of 3 kVA was implemented, and peak efficiency of 96.0% was achieved.

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IEEE Transactions on Industrial Electronics  (Volume:55 ,  Issue: 7 )