期刊
INTERNATIONAL JOURNAL OF EMERGING ELECTRIC POWER SYSTEMS
卷 17, 期 6, 页码 671-682出版社
WALTER DE GRUYTER GMBH
DOI: 10.1515/ijeeps-2016-0052
关键词
harmony search algorithm; selective harmonic elimination; pulse-width modulation; three level inverter
Selective Harmonic Elimination (SHE) technique is the fundamental switching frequency scheme that is used to eliminate specific order harmonics. Its application to minimize low order harmonics in a three level inverter is proposed in this paper. The modulation strategy used here is SHEPWM and the nonlinear equations, that characterize the low order harmonics, are solved using Harmony Search Algorithm (HSA) to obtain the optimal switching angles that minimize the required harmonics and maintain the fundamental at the desired value. Total Harmonic Distortion (THD) of the output voltage is minimized maintaining selected harmonics within allowable limits. A comparison has been drawn between HSA, Genetic Algorithm (GA) and Newton Raphson (NR) technique using MATLAB software to determine the effectiveness of getting optimized switching angles.
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