Optimization angle control technique for multilevel inverter

The optimization of levels with a minimum number of power supplies can be achieved by using Asymmetrical multilevel inverters. An asymmetrical multilevel inverter topology is presented in this paper for medium voltage application. It is based on the series(cascade) connection of the several H-bridge inverter cells powered by the supplies which are in Geometric propagation with different ratios like 2,3 etc. An optimization angle control strategy is proposed for this topology that the switches of different cells works at different switching frequency for low switching losses. Lastly, an experimental 9-level and 27 level asymmetrical inverter system are built to verify the topology and angle control method. The experimental results agree well with simulations results and the validiate and practicability of this topology and control method proposed is proved. Simulation using Matlab Simulink is done to verify the performance of the Asymmetrical Cascaded Multi Level Inverter using optimization angle control technique.