Optimized she PWM Technique with Odd and Even Values Using GA for Three Phase Voltage Source Inverters

Selective Harmonic Elimination Pulse Width Modulation (SHEPWM) technique is one of the control techniques for inverters. It is mainly used for reducing the harmonic content in single phase and three phase inverters and to improve the power quality. The selection of switching angles for eliminating particular harmonic is difficult. The proposed method uses one of the soft computing techniques Genetic Algorithm(GA) to optimize the switching angle given to the inverter. The bipolar waveform includes both odd and even number of switching angles to eliminate particular harmonics from inverter output. Elimination of selected harmonics is verified using matlab simulation. Optimized SHEPWM technique is compared with standard PWM method using matlab simulation and results are presented.