New hybrid quasi Z-source inverter based on diode-capacitor basic unit

摘要

One of the main problems of the Z-source inverters (ZSI) is lack of capability in obtaining high boost factor. In order to receive this aim, a new hybrid Quasi Z-source inverter (HQZSI) with the capability of obtaining desired boost factor is proposed. The proposed inverter is the combination of diode basic unit and capacitor basic unit as a new basic unit. The one-cell HQZSI is completely analysed and the equations of the diode voltage stress, capacitor voltage stress and boost factor are obtained. In addition, it is possible to extend the proposed inverter by increasing the number of used basic units. Two-cell HQZSI and the developed HQZSI that are also analyzed and their related equations are also obtained. Finally, the accuracy performance of the proposed inverter and presented analyses is reconfirmed by using the simulation resluts on the two-cell HQZSI in EMTDC/PSCAD software.