A Comparative Analysis of Different Multilevel Inverters

In recent days, power demand is continuously increasing. Therefore, the use of nonconventional energy sources is rapidly increasing. Among the various non-conventional sources solar energy is more promising one. The Solar energy is converted into electricity using Photovoltaic modules whose output is DC in nature. This DC is required to convert into Ac using multilevel inverters. In multilevel inverters as the number of levels in the output voltage increases, the accuracy of the system increases and the output voltage approaches nearer to the sinusoidal. As the levels in multilevel inverter increases, the complexity of the system increases due to their control strategy requirement. So at every stage user has to make a trade off with the quality of the output and complexity of the circuit. This paper deals with the 5, 7, 9, 11 levels of H bridge cascaded inverters and the simulation studies using MATLAB/Simulink software, withequal angle switching and equal area switching methods for different levels of inverters. A comparative study between different parameters of the multilevel inverters is performed for the selection of required multilevel inverter. The results obtained are also presented.