Design, Analysis, and Implementation of an Improved High-Gain Quasi-Switched Boost Inverter

The salient advantages of inverters based on impedance source networks have made them proper for renewable energy conversion applications that are required to increase input DC voltage and convert it to AC energy. Switched Boost Inverters (SBI) are single-stage DC-AC power converters utilizing an active switch in the impedance network whose output voltage can be greater or less than its input DC voltage. This paper introduces a modified quasi-Z-source inverter (qZSI) structure with an active or quasi-switched boost inverter (qSBI). The suggested inverter provides a high boost factor with a small shoot-through interval and a high modulation index. The distinguished features of the suggested inverter are continuous input current and low voltage stress of switches. Moreover, despite the significant impedance source inverters, the suggested inverter is deprived of initial inrush current. Hence, the input voltage ripple is slight. Operation principles and requisite analyses have been represented, and comparisons based on various parameters with similar inverters have been carried out to showcase the superiority of the suggested inverter. Simulation results have been carried out in MATLAB\Simulink environment. The experimental results validate the accuracy and performance of the suggested inverter.