Realization of GA Based SHE-PWM Technique for a Three Phase Matrix Converter and Comparison of Performance with Conventional Modulation Algorithms

Abstract

A control methodology based on selective harmonic elimination pulse width modulation (SHE-PWM) suitable for a
three phase matrix converter is proposed in this paper. This technique enables the linear control of the fundemental
component of the output voltage and eliminates the lower order harmonics. In this paper the realization of
SHEPWM technique using genetic algorithm is discussed.The parameters used to analyze the performance of the
matrix converter are the input total harmonic distortion factor and the output voltage total harmonic distortion
factor. In the proposed methodology the optimum switching angles are obtained using genetic algorithm by keeping
the switching frequency fixed. The obtained results are compared with the conventional modulation techiques auch
as venturini algorithm, optimum venturini modulation algorithm, space vector modulation algorithm. The results
show that when matrix converter is switched with the help of selective harmonic elimination(SHE) the total harmonic
distortions and the values of the selective harmonics are reduced. The theoretical predictions are verified using
simulation studies with the help of MATLAB/SIMULINK.