Z-source converter applied for single-phase to three-phase conversion system

This paper presents a configuration for single-phase to three-phase power conversion. The proposed topology combines the principle of series active power filter and the concept of Z-source inverter, which guarantees the high voltage requirement of the three-phase load. A comparison with the direct solution shows that with the proposed topology it is possible to reduce the voltage ratings of the power switches and also the stress of the inductor and capacitor of the Z-source converter, since just part of the energy flow goes through the power converter. On the other hand, in the direct solution the total of energy flow goes through the power converter. A suitable control strategy and PWM technique is presented. Simulation and experimental results are presented as well.