A novel high efficient fifteen level power converter

A novel competitive fifteen level power converter is presented in this paper. The proposed scheme is characterized by the use of small number of power switches and passive components. It presents a reduced impact on the supply network in terms of harmonics and energetic efficiency. A control strategy based on an average model is performed and a linear control law is designed in order to draw a nearly sinusoidal line current. The use of the proposed converter reduces or even avoids utilization of active and passive filters which results on an optimized installation cost. The proposed converter presents also the possibility and the simplicity of changing the number of voltage levels only by acting on-line on the ratios of the desired output voltages. The modeling and control strategy of the proposed fifteen level converter were verified by simulation.