Comparative Performance analysis of Multilevel Inverter through meta heuristics

The multilevel inverters are of wide use in recent era. Conventional multilevel inverters (MLI's) used previously has greater numbers of switches which gives enormous switching losses. Requirement for bargain in losses and elevated efficiency, reduced switch topologies came into picture. The critical task of an inverter is to obtain pure sinusoidal output voltage. Obtaining such waveform can be carried out with the resource of the use of disposing of the lower order harmonics. As the stages of the inverter will grow the number of Harmonics eliminated moreover will grow. Selective Harmonic Elimination (SHE) technique is employed to estimate the switching angles. The topology of eleven level MLI is proposed to reduce the switches, switching losses, total harmonic distortion and converter cost. The THD is itself a non-linear problem and can be effectively handled by meta heuristic techniques such as PSO, DE and TLBO. In the comparative study of the meta heuristic techniques, TLBO outperforms from the other techniques.