DocumentCode :
1823578
Title :
Optimization of voltage levels in multilevel inverters
Author :
Ziar, Hesan ; Afjei, E. ; Siadatan, A. ; Mansourpour, S.
Author_Institution :
Dept. of Electr. & Comput. Eng., Shahid Beheshti Univ., Tehran, Iran
fYear :
2011
fDate :
8-10 Sept. 2011
Firstpage :
216
Lastpage :
220
Abstract :
The main objective of static power converters is to produce an AC output waveform from a DC power supply. The output voltage waveform is not exactly a sinusoidal wave. Some ways should be found to improve the output voltage waveform. This paper introduces a method to minimize the total harmonic distortion (THD) of output voltage waveform in multilevel inverters. Steps amplitude of output voltage wave is so effective in total harmonic distortion. DC voltage sources of a cascade inverter determine the amplitude of steps. Capacitors, batteries, and renewable energy voltage sources can be used as the multiple DC voltage sources. Values of these DC sources could be set optimum to improve the THD. Parametrical Fourier analyzing of output signal would give an equation which helps us in this project. This equation presented in this paper. Optimtool-MATLAB and SIMSCAPE-SIMULINK-MATLAB software have been used for simulation. Results show that the DC sources in a cascade multilevel inverter shouldn´t be equal and needs to be set at definite values.
Keywords :
Fourier analysis; harmonic distortion; power convertors; power supply circuits; AC output waveform; DC power supply; Optimtool-Matlab software; Simscape-Simulink-Matlab software; THD; batteries; capacitors; cascade multilevel inverter; multiple DC voltage sources; output signal analysis; output voltage wave; parametrical Fourier analysis; renewable energy voltage sources; static power converters; step amplitude; total harmonic distortion; voltage level optimization; H-bridge; Multilevel; Total harmonic distortion; inverter; voltage levels;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electrical Machines and Power Electronics and 2011 Electromotion Joint Conference (ACEMP), 2011 International Aegean Conference on
Conference_Location :
Istanbul
Print_ISBN :
978-1-4673-5004-4
Electronic_ISBN :
978-1-4673-5002-0
Type :
conf
DOI :
10.1109/ACEMP.2011.6490598
Filename :
6490598
Link To Document :
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