A Novel Four Level Cascaded Z-Source Inverter

Abstract

This paper presents a novel four-level cascaded Z-source inverter based on space vector pulse width modulation (SVPWM) technique. The proposed model provides high gain output voltage compared to the conventional four-level inverter and wide range of control using SVPWM. This effectively utilizes the DC sources for varying modulation index while synthesizing output voltage with lower harmonic distortion and high gain. Besides, it alleviates the voltage balancing problem and lower components count compared to NPC and cascaded multilevel inverters. The proposed model finds application in industrial, domestic and automobile sectors. To validate the theoretical concept, the proposed model is developed in MATLAB/Simulink environment and the results are presented and compared with the conventional four level inverter.