Defay, François and Llor, Ana-Maria and Fadel, Maurice A predictive control with flying capacitor balancing of a multicell active power filter. (2008) IEEE Transactions on Industrial Electronics, vol. 55 (n° 9). pp. 3212 -3220. ISSN 0278-0046
(Document in English)
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Official URL: http://dx.doi.org/10.1109/TIE.2008.927989
Unlike traditional inverters, multicell inverters have the following advantages: lower switching frequency, high number of output levels, and less voltage constraints on the insulated-gate bipolar transistors. Significant performances are provided with this structure which is constituted with flying capacitors. This paper deals with a predictive and direct control applied to the multicell inverter for an original application of this converter: a three-phase active filter. To take advantage of the capabilities of the multicell converter in terms of redundant control states, a voltage control method of flying capacitor is added, based on the use of a switching table. Flying capacitor voltages are kept on a fixed interval, and precise voltage sensors are not necessary. The association of predictive control and voltage balancing increases considerably the bandwidth of the active filter.
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