A new method for Selective Harmonic Elimination in Voltage Source Inverter using Imperialist Competitive Algorithm

This paper presents an efficient and reliable Evolutionary Algorithm based solution for Selective Harmonic Elimination (SHE) switching pattern. This method eliminatesconsiderable amount of lower order line voltage harmonics in Pulse Width Modulation (PWM) inverter. Determination of pulsepattern for the elimination of some lower order harmonics of a PWM inverter necessitates solving a system of nonlinear transcendental equations. Imperialist Competitive Algorithm isused to solve nonlinear transcendental equations for PWM-SHE. Several methods are available to eliminate the higher orderharmonics and it can be easily removed. But the greatest challenge is to eliminate the lower order harmonics and this is successfully achieved using Imperialist Competitive Algorithmwithout using transformer. Simulations using MATLAB are carried out to validate the solution and are compared with the Genetic Algorithm. The results show that the harmonics up to 13th were totally eliminated.

کلیدواژه ها:

Inverter ، Harmonics ، Imperialist Competitive Algorithm (ICA) ، Selective Harmonic Elimination