Predictive control for a series stacked flying-capacitor active rectifier

The use of power electronics in power systems have increased in recent years. Because of limitations in the power switches available new converter topologies have been developed to achieve higher voltage ratings. One such topology is a series stack of converters where the input voltage is divided between multiple converters. This paper evaluates three finite-state model-based predictive control algorithms for the control of such a topology. The algorithms are applied to a series stack of two three-level, flying-capacitor converters. The converters operate as active rectifiers with the possibility of being implemented as a solid state transformer. The different algorithms are compared by means of simulation results.