Low order harmonics minimization in multilevel inverters using firefly algorithm

A solution to harmonics minimization problem using firefly algorithm (FFA) is proposed and results have been applied on multilevel inverter. 5th, 7th, 11th and 13^th harmonics are minimized using selective harmonic elimination pulse-width modulation (SHE-PWM). The firefly algorithm (FFA) is used to generate optimized firing angles for multilevel inverter to generate desired outputs having minimized harmonics and lower total harmonics distortion. The output phase and line voltages are plotted in visual charts and their harmonic spectra is analyzed through fast fourier transform (FFT) analysis. The final results from simulations indicate minimization of the low order harmonics as desired.