Selective Harmonic Elimination in PWM Inverter Using Fire Fly and Fire Works Algorithm

Abstract

This work considers new applications of Firefly and Fireworks algorithm for solving the selective harmonic elimination problem in inverter output waveforms. The higher order harmonics in the output of the inverter can be eliminated easily by using small passive filters. Lower order harmonic elimination requires selecting a pre-specified firing angle. That angle is one of the many solutions of a non-linear transcendental equation of PWM output. The lower order harmonics are eliminated in the generation stage by proper switching of PWM inverter switches. The effectiveness of an algorithm is judged based on many parameters like the rate of convergence, number of iterations, accuracy etc. The power of the two algorithms are evaluated for this application and found to be better than those found in the literature.