THD Analysis of Eleven Level Cascaded H-Bridge Multilevel Inverter with Different Types of Load Using in Drives Applications

The use of multilevel inverters has become popular in recent years for high power applications. Multilevel inverters are power converter systems composed by an array of power semiconductor sources which when properly connected and controlled, can generate a multistep voltage waveform with variable and controllable frequency, phase and amplitude. This study deals with an eleven level inverter system with different types of loads, the voltage source inverters (VSI) are modelled and simulated using MATLAB simulink and the results are presented. The test results verify the effectiveness of the proposed strategy in terms of computational efficiency as well as the capability of the inverter to produce very low distorted voltage with low switching losses. This research aims to extend the knowledge about the performance of different clamped multilevel inverter through harmonics analysis. Simulations results validate up to the mark performance of the mentioned topologies.