Multilevel-clamped multilevel converters (MLC2)

摘要

The present invention discloses the multilevel-clamped multilevel converter (MLC 2 ) . In this invention the multilevel clamping concept is devised, whereby a DC bus voltage, comprised of multiple DC bus voltage nodes, is managed by one or more multilevel clamping units (MCUs) to convey a higher number of levels for synthesizing the output waveforms of a DC-AC multipoint clamped (MPC) power conversion structure. Thus the resultant converter has the number of levels increased when compared with conventional MPC multilevel solutions, which is very important for improving power quality, while the overall structure is kept simple, wherein the number of components can be considerably reduced.