Analysis and simulation of even-level quasi-Z-source inverter

Niltala Sai shanmukha Akshath (Aditya Engineering College)
Avugaddi Naresh (Aditya Engineering College)
Matcha Nikesh kumar (Aditya Engineering College)
Mayur Barman (Aditya Engineering College)
Durgesh Nandan (Symbiosis International (Deemed University))
Tirupathi Abhilash (CL Educate Ltd)

International Journal of Electrical and Computer Engineering
Vol 12, No 4: August 2022

This research proposes a seven-level inverter with quasi-Z-source boost converters. The proposed topology employs a packed U-cell asymmetrical type multilevel inverter along with front-end quasi-Z-source networks. The quasi networks provide high gain compared to a conventional boost converter. This topology is the most suitable for photovoltaic multi-string applications. The proposed topology has the potential to supply both the alternating current (AC) and direct current (DC) type load. The inverter structure has a lower number of active switches which helps in the reduction of losses and improvement in efficiency. In this paper, the operation principle of a quasi-network and inverter circuit are explained in detail. In addition, the simulation results for various modulation indices are presented. In the MATLAB/Simulink environment, the architecture is proposed by using gated sinusoidal “Pulse width modulation”.