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Design and control of high performance modular hybrid asymmetrical cascade multilevel inverters


S. Mariéthoz

IEEE Trans. on Industry Applications, vol. 50, no. 6, pp. 4018 - 4027

The paper focuses on the active balance of modular hybrid asymmetrical cascade multilevel drives. It investigates special configurations where the high-voltage cell can be operated at low-switching frequency, while correcting the energy imbalances of the low-voltage cells. Among these, it proposes to use configurations with no more than two types of cells and switching devices for modularity. It proposes a high-dynamic performance active balance scheme that decouples the correction of the different imbalances. This allows fast control of the load, while maximizing the inverter voltage use, which results in a higher energy efficiency. An optimal feedback is proposed to correct phase imbalances through the control of the common mode of the low-voltage cells. The effectiveness of the proposed concepts is validated experimentally on a multilevel drive.

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% Autogenerated BibTeX entry
@Article { Xxx:2014:IFA_4770,
    author={S. Mari{\'e}thoz},
    title={{Design and control of high performance modular hybrid
	  asymmetrical cascade multilevel inverters}},
    journal={IEEE Trans. on Industry Applications},
    pages={4018 -- 4027},
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