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Non-traditional method-based solution for elimination of lower order harmonics in voltage source inverter feeding an induction motor drive

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Author(s): Vargese Jegathesan | Jovitha Jerome

Journal: Serbian Journal of Electrical Engineering
ISSN 1451-4869

Volume: 5;
Issue: 2;
Start page: 273;
Date: 2008;
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Keywords: inverter | harmonics | genetic algorithm (GA) | pulse width modulation (PWM) | selective harmonic elimination (SHE).

ABSTRACT
This paper presents an efficient and reliable Genetic Algorithm-based solution for Specific Harmonic Elimination (SHE) switching pattern. This method eliminates considerable amount of lower order line voltage harmonics in Pulse Width Modulation (PWM) inverter. The determination of pulse pattern for the elimination of some lower order harmonics of a PWM inverter necessitates solving a system of nonlinear transcendental equations. Genetic Algorithm is used to solve nonlinear transcendental equations for PWM-SHE. In this proposed method, harmonics up to 17th are eliminated using Genetic Algorithm without using Dual transformer. Simulations using Matlab 7.0 and PSIM 6.1 are carried out so as to validate the solution.
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