High-performance quasi-Z-source inverter with low capacitor voltage stress and small inductance

A high-performance quasi-Z-source inverter (qZSI) is presented in this study. The proposed circuit has the four advantages: (i) reduction in voltage stress across the Z-network capacitor, (ii) voltage source and inverter bridge share the same ground point, (iii) reduced inrush current during start-up, (iv) wide range of load operation even with a small inductance in the Z-network. The proposed qZSI can be controlled as the traditional ZSI. This study analyses the operation principle of the proposed circuit and carries out its parameter design. Finally, experimental results are presented to validate the operation of the proposed qZSI.