Implementation of new H-Bridge multilevel inverter using a combination of high frequency and low frequency modulation

This paper proposes a seven level inverter with photovoltaic system,for stand-alone applications with hybrid PWM control scheme. Three carrier signals that are identical to each other which are compared with unidirectional sinusoidal reference signal were used to generate the PWM signals. In this paper,a new topology with a combination of low frequency and high frequency switches is proposed to improve the performance of a multilevel inverter. This topology requires fewer components compared to existing inverters and requires fewer carrier signals and gate drives. Therefore,the overall cost and complexity are greatly reduced. The performance of proposed multilevel inverter with equal dc sources is simulated by using MATLAB platform. Harmonic analysis is done on H-Bridge seven level inverter and experimental results are presented to demonstrate the superiority of the proposed system.