Optimized harmonic elimination for cascaded multilevel inverter
Hossam, Ramy M.; Hashem, Gamal M.; Mostafa Ibrahim Mohamed Marei;
Abstract
Optimized Harmonics Stepped Waveform Pulse-Width Modulation(OHSW-PWM) for high voltage high power cascaded multilevel inverter with equal DC sources are commonly used in constant frequency utility applications. Stepped switching angles for cascaded multilevel inverter are calculated by solving nonlinear equations to eliminate preselected lower order harmonics. This paper proposes a generalized method to calculate the switching angles based on Newton-Raphson method for solving the nonlinear equations, which are transcendental in nature and multiple solutions exist. Calculations of the switching angels are performed by anticipated formula for calculating the initial angles values. This paper presents solutions for 5, 7, 9, 11, and 13 multilevel inverters under different values of the modulation index using Matlab software. The results reveal that Newton-Raphson method can be effectively used to calculate the switching angles that eliminate the selective lower order harmonics from the MLI output voltage and reduce the total harmonic distortion. The experimental and simulated results proved the effectiveness of the proposed method. © 2013 IEEE.
Other data
Title | Optimized harmonic elimination for cascaded multilevel inverter | Authors | Hossam, Ramy M.; Hashem, Gamal M.; Mostafa Ibrahim Mohamed Marei | Keywords | Cascaded Multilevel Inverter;Optimized Harmonic Stepped Waveform;Selective Harmonics Elimination PWM. Newton-Raphson method | Issue Date | 1-Dec-2013 | Conference | Proceedings of the Universities Power Engineering Conference | ISBN | 9781479932542 | DOI | 10.1109/UPEC.2013.6714984 | Scopus ID | 2-s2.0-84894107722 |
Recommend this item
Similar Items from Core Recommender Database
Items in Ain Shams Scholar are protected by copyright, with all rights reserved, unless otherwise indicated.