Power Routing for Cascaded H-Bridge Converters
2017; Institute of Electrical and Electronics Engineers; Volume: 32; Issue: 12 Linguagem: Inglês
10.1109/tpel.2017.2658182
ISSN1941-0107
AutoresYoungjong Ko, Markus Andresen, Giampaolo Buticchi, Marco Liserre,
Tópico(s)HVDC Systems and Fault Protection
ResumoModular power converters are expected to play a major role in medium- and high-voltage/power applications. Normally, each module processes the same amount of power; however, this does not take into consideration that different modules can have a different remaining useful lifetime. This paper proposes the concept of power routing for cascaded H-bridge (CHB) converters, with the purpose of delaying the failure of the system. A third-harmonic injection into the duty cycles allows extending the imbalance capability of the structure, keeping the CHB operational even if some power paths are completely unloaded. Analytic investigation in conjunction with simulation and experimental measurements demonstrate the power routing by means of the proposed method.
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