Analysis of a three phase five-level dual tapped inductor quasi impedance source-nested neutral point clamped converter

Further growth in renewable energy integration would be dependent on reliability and cost-effectiveness. These two factors can be achieved through power converter topologies that enable transformer-less connection of renewable energy based technology to the grid. This paper presents a three phase five level dual tapped inductor quasi impedance source (qZS)-nested neutral point clamped (NNPC) topology for medium voltage, renewable energy applications. This topology is based on the high boosting factor of the dual tapped inductor quasi source network with minimal shoot-through period and the multilevel feature of the nested neutral-point clamped (NNPC) converter. The steady-state analysis of the proposed topology is presented to illustrate the performance of the converter at continuous conduction mode (CCM). The theoretical analysis has been verified.