A NEW ENHANCED GOAT ALGORITHM FOR FINDING OPTIMUM SWITCHING ANGLE AND HARMONIC REDUCTION

Abstract:-Multi level inverters are used now a days at large,because they have lesser harmonics  than single level inverter. Several methodologies  have been worked out  in order  to reduce the harmonics.It has been proved that  the soft computing algorithms based switching angle calculation are more efficient than the conventional methods.In this paper  a 7 level inverter has been used  for DC to AC conversion.A new nature inspired Goat algorithm has been proposed  in this paper.This algorithm has been applied  for  a single phase  seven level inverter first. This algorithm has been tested by writing proper code  in MATLAB-Mfile and it has been found that it consumes  less computational time than the other  algorithms since several goats explore solution space at a time. The results show  that the  harmonics obtained from inverter using the switching angles calculated from the algorithm are very much reduced and THD  is almost around 12%.Key Words-7 level inverter, Goat algorithm, Switching angle ,Total harmonic distortio