Harmonic optimization of thirteen level uniform step asymmetric Inverter using hybrid BBO/DS algorithm

The role of Multilevel Voltage Source Inverter in high power applications has increased in recent times. Unlike the traditional inverter, the MLI´s output voltage has a reduced THD with better harmonic profile. The control technique used in this multilevel inverter is Selective Harmonic Elimination Pulse Width Modulation (SHE-PWM). Further a hybrid algorithm that combines Bio-geographical based optimization (BBO), a global search method with direct mesh adaptive direct search (MADS), a local search method, is proposed in this paper to enhance the performance. Simulation is presented to validate the approach.