This paper presents a genetic algorithm (GA) optimization technique to determine the optimum
switching angles of the multilevel inverter. This technique is used to eliminate low order
harmonics of output voltage to minimize the total harmonic distortion (THD), with different levels
of configurations. The effectiveness of this technique is tested by simulation results, which are
used for calculating the optimum switching angles of three-phase li-level inverters, with equal
and unequal DC supplies. Finally, the results show that the GA technique gives lower THD
compared with results reported in the literatures using other techniques.