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Multilevel converters (MCs) are utilized in medium voltage (MV) high power applications due to its higher efficiency than two level converters. On the other hand, modular multilevel converters (MMCs) provide several advantages with regard to other MCs, such as higher scalability, reliability and no requirement of a common DC capacitor. Particularly, low switching frequency modulations, such as (2N+1)...
A new hybrid multilevel multi-converter system combining three single-phase GTO converters with a three-phase NPC IGBT converter is proposed. The GTO converters can adjust the output voltage, though they operate in square-wave switching to minimize the switching-related device losses. The IGBT converter not only cancels the harmonic voltages generated by the GTO converters but also controls the resultant...
Wind energy is undergoing a rapid development in size and capacity. Multilevel converters show interesting advantages in this field, such as high efficiency and low harmonic distortion. This work is focused on the analysis of these two features offering experimental results which verify the improvement of this kind of converters on the traditional two level topologies. Finally, we describe an experimental...
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