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This paper presents the mitigation of total harmonic distortions (THD) in cascade H-bridge multilevel inverter. Selective harmonic elimination pulse width modulation (SHE-PWM) switching method is used to calculate the values of switching angles from the solution of non-linear transcendental equations. These non-linear complex equations is minimized by the using of particle swarm optimization (PSO) and genetic algorithm (GA) techniques, and also have been compared the simulating and analyzing results related to harmonics.doi:10.14445/22315381/ijett-v12p287 fatcat:7hgrddoyrvftvpkw2tbqlokfhq