SELECTIVE HARMONIC ELIMINATION FOR VSI FED DRIVES

Author’s Name : M Narayanan | D Velmurugan

Volume 02 Issue 01  Year 2015  ISSN No:  2349-2503  Page no: 6-9

Abstract – Voltage Source Inverter (VSI) fed drives plays a vital role in energy savings. The problem with these drives is the presence of harmonics which produces unnecessary heating, reduced power factor and other effects. So it becomes a major concern to eliminate the harmonics present. Various techniques are used to solve the problem of harmonics but each one has its own limitation. The technique Selective Harmonic Elimination (SHE) is analyzed for a single phase full bridge inverter to eliminate dominant harmonics present in the system. A suitable design of filter also helps to eliminate the higher order harmonics, which as a result reduces Total Harmonic Distortion (THD) level. Results are obtained using MATLAB software.

Keywords –Selective Harmonic Elimination, Unipolar Pulse Width Modulation, Pattern Search Method, Total Harmonic Distortion