Comparison study of different pulse width modulation techniques for Extended boost Z-source inverter

This paper presents a comparative study of different classical as well as advanced PWM techniques for a new ZSI topology known as Extended-boost ZSI. The PWM techniques has been divided into two parts; one is carrier based PWM techniques and another is space vector based PWM techniques. There exist some advanced PWM techniques like Bus Clamping PWM techniques. This paper presents an analytical study and its implementation in MATLAB/Simulink software with different PWM techniques for Extended-boost ZSI. The maximum boost control technique for proposed topologies has been implemented considering Sine Triangle, Third Harmonic Injection, Triplen Injection and Bus Clamping 30
⁰
and 60
⁰
PWM techniques. Further it has been implemented for space vector PWM. It has been observed that Triplen and Bus-clamping 30
⁰
PWM techniques give the minimum THD for line-to-line voltage as well as line current. Further in SVPWM approach, BC 30
⁰
PWM improves the harmonic profile of output line-to-line voltage and current as compared to CSVPWM and BC 60
⁰
.