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Hybrid Genetic Algorithm Approach for Selective Harmonic Control

Lookup NU author(s): Dr Mohamed Dahidah

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Abstract

The paper presents an optimal solution for a selective harmonic elimination pulse width modulated (SHE-PWM) technique suitable for a high power inverter used in constant frequency utility applications. The main challenge of solving the associated non-linear equations, which are transcendental in nature and, therefore, have multiple solutions, is the convergence, and therefore, an initial point selected considerably close to the exact solution is required. The paper discusses an efficient hybrid real coded genetic algorithm (HRCGA) that reduces significantly the computational burden, resulting in fast convergence. An objective function describing a measure of the effectiveness of eliminating selected orders of harmonics while controlling the fundamental, namely a weighted total harmonic distortion (WTHD) is derived, and a comparison of different operating points is reported. It is observed that the method was able to find the optimal solution for a modulation index that is higher than unity. The theoretical considerations reported in this paper are verified through simulation and experimentally on a low power laboratory prototype.

Publication metadata

Author(s): Dahidah MSA, Agelidis VG, Rao MVC

Publication type: Article

Publication status: Published

Journal: Energy Conversion and Management

Year: 2008

Volume: 49

Issue: 2

Pages: 131-142

ISSN (print): 0196-8904

ISSN (electronic): 1879-2227

Publisher: Elsevier Ltd

URL: http://dx.doi.org/10.1016/j.enconman.2007.06.031

DOI: 10.1016/j.enconman.2007.06.031

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