ANALYSIS OF SVPWM Z-SOURCE INVERTER

Abstract

The present work includes the performance analysis of Z-source inverter which provide attractive solution of DC to AC conversion. It also discusses the selection of inductor and capacitor used for the proposed Z-source inverter which can provide both boost and buck operation which make output voltage higher or lower than Dc link voltage. The different control strategy to control the proposed Z-source inverter are analyzed namely Simple boost control, Maximum boost control, Maximum constant boost control and modified Space vector pulse width modulation and are compared with respect to voltage gain and voltage stresses. The other variants of Z-source inverter namely the trans-z-source inverter and T-source inverter have also been discussed with respect to boost voltage, Harmonic distortion and time to reach steady state. The inverter is analyzed under different loading conditions with different control strategies and the results are discussed in detail. Further, Multi-level Z-source inverter is also simulated and results are compared with conventional MLI