A Predictive Control With Flying Capacitor Balancing of a Multicell Active Power Filter
Defay, F.; Llor, A.-M.; Fadel, M.
Industrial Electronics, IEEE Transactions on
Volume 55, Issue 9, Sept. 2008 Page(s):3212 - 3220
Digital Object Identifier   10.1109/TIE.2008.927989
Summary: 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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