Developed Hybrid Quasi Z-Source Inverter Based on Capacitor and Diode Cells: Analysis and Implementation

Abstract

In this paper, a new developed quasi Z-source inverter is proposed. This new topology is based on a new hybrid-cell which is combined of a diode cell and a capacitor cell. The proposed inverter is called discontinuous diode capacitor assisted quasi Z-source inverter (DDCAQZSI). This inverter is analyzed in three modes: two-cell QZSI, three-cell QZSI and n-cell QZSI. In all above mentioned topologies the structure is completely analyzed and the equations of the boost factor, diodes and capacitors voltage stresses, input dc link and inductor’s current are calculated. According to the obtained results, the boost factor of the proposed inverter is increased by increasing the number of used proposed basic units. Then, the accuracy performance of the proposed topology and its obtained equations are verified by the simulation results. The simulation results done in EMTDC/PSCAD software program and on the two-cell DDCAQZSI.