A Single Phase Eleven Level Cascaded H-Bridge Multilevel Inverter for Photovoltaic Systems Using Multicarrier Pwm

Abstract: A Cascaded H-Bridge Multilevel Inverter is a power electronic converter built to synthesize a desired ac voltage from several levels of dc voltages with better harmonic spectrum. Such inverters are suitable for high voltage and high power applications and have been an important development in recent years. This paper presents the performance of a eleven level cascaded H-Bridge multilevel inverter topology with multicarrier pulse width modulation technique for photovoltaic cell. This inverter is capable of producing eleven levels of output voltage from the dc supply voltage. This topology magnifies the fundamental output voltage with reduction in total harmonic distortion. The output is drawn near the sine wave because of more levels. It can also be easily extended to an m-level inverter. The performance of the proposed PWM strategy in terms of output voltage and THD is shown using MATLAB/Simulink.