Cascaded H-Bridge 11-level Multilevel Inverter

This paper basically focusses on the design and implementation of a topology for a three phase eleven level cascaded H-bridge multilevel inverter by employing different kinds of switching methods. The basic purpose of this work is to increase the number of voltage level at the output withreduction of complexity to power circuit. The main advantages of this proposed topology is to reduce the Total Harmonic Distortion and minimise electromagnetic interface EMI generation and high voltage with very nearly to sine waveform. In this work, several kinds of carrier pulse width modulation techniques are proposed as which reduced the total harmonic distortion and improve the out voltage from the proposed topology and POD modulation techniques reduce the Total Harmonic Distortion. A number of H-bridge arranged in cascade form to increase the voltage level with the different switching schemes It is observed that this new topology can be recommended to three phase eleven level cascaded H-bridge inverter for getting optimum performance over the conventional methods. This performance in optimized in the eleven level of inverter. Improving the fundamental waveforms and reducing the total harmonic distortion is achieved by Utilizing 60 IGBTs and switching is arranged by a topology in cascaded form. The simulation model is produced by MATLAB 2018 software version.