Elimination of Harmonics in a Multi-Level Inverter with Unequal DC Sources Using the Homotopy Algorithm

Author

Aghdam, M. G Hosseini ; Fathi, S.H. ; Gharehpetian, G.B.

Author_Institution

Amirkabir Univ. of Technol., Tehran

fYear

2007

fDate

4-7 June 2007

Firstpage

578

Lastpage

583

Abstract

This paper focuses on elimination of harmonics in a multi-level voltage-source inverter with unequal DC sources. The main objective of harmonic elimination is to reduce the total harmonic distortion (THD) in the output voltage waveform. The basic concept of this reduction is to eliminate specific harmonics, which are generally the lowest orders, with an appropriate choice of switching angles. Homotopy algorithm is used to solve the transcendental equations for finding the switching angles. This algorithm can be used for any number of voltage levels without complex analytical calculations. Simulation results verify the validity and effectiveness of the proposed algorithm.

Keywords

harmonic distortion; invertors; power conversion harmonics; switching convertors; THD; harmonics elimination; homotopy algorithm; multilevel voltage-source inverter; output voltage waveform; switching angles; total harmonic distortion; transcendental equations; unequal DC sources; Circuit topology; DC generators; Diodes; Equations; Polynomials; Power harmonic filters; Pulse width modulation inverters; Space vector pulse width modulation; Total harmonic distortion; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics, 2007. ISIE 2007. IEEE International Symposium on

Conference_Location

Vigo

Print_ISBN

978-1-4244-0754-5

Electronic_ISBN

978-1-4244-0755-2

Type

conf

DOI

10.1109/ISIE.2007.4374660

Filename

4374660