Abstract
One of the most important parts of photovoltaic system is inverter. In recent years; impedance source inverter (ZSI), which is a buck-boost inverter without the need of a dc-dc converter, has been presented to overcome disadvantages of voltage source and current source inverters, and a lot of papers about ZSIs have been published in international literature. ZSIs should have high efficiency and low cost and sustain a high quality output voltage to be an economic alternative to conventional inverters. Meeting these requirements basically depends on the used control method. Since there are very few works about ZSI control methods comparison, both all the sinusoidal pulse width modulation (PWM) control methods that are presented in the literature up to now, and space vector modulation control methods that are used recently with different switching schemes are analysed in this study, and all these methods are simulated via Matlab/Simulink. The results are compared, and it has been seen that space vector PWM can be applied to ZSIs without any problem, and it has superior performance than sinusoidal PWM control methods.