HARMONICS MITIGATION IN INVERTER BY IMPLEMENTING SHEPWM TECHNIQUE

Abstract: The use of power electronic converters has increased significantly in recent years due to their high efficiency, flexibility, and reliability. However, the switching action of these converters causes harmonic distortion in the output waveform, leading to undesirable effects such as electromagnetic interference, reduced power quality, and increased losses. To mitigate these issues, various modulation techniques have been developed, such as Pulse Width Modulation (PWM) and Selective Harmonic Elimination Pulse Width Modulation (SHEPWM). This paper presents a comparative study of the harmonic distortion in between PWM and SHEPWM techniques, analyzing their advantages and disadvantages, and providing insights into their performance under different operating conditions. The results indicate that SHEPWM offers superior harmonic distortion reduction at the cost of increased complexity, while PWM is simpler to implement but may require additional filtering to achieve acceptable distortion levels.

Keywords: Opto Coupler Driver, IGBT, SHEPWM, Resistive Load.