Analytical solution to harmonic characteristics of traction PWM converters

Author

Shen, J. ; Taufiq, J.A. ; Mansell, A.D.

Author_Institution

GEC Alsthom Traction Ltd., Preston, UK

Volume

144

Issue

2

fYear

1997

fDate

3/1/1997 12:00:00 AM

Firstpage

158

Lastpage

168

Abstract

The paper presents an analytical technique for calculating the AC input current harmonic spectrum of single-phase PWM converter drives used in railway traction. The technique is based on a 3-D modulation model and the double Fourier series (DFS) method. Formulas in the form of Bessel functions representing the harmonic spectra for several combinations of interlaced PWM converters are derived. These give a useful insight into the harmonic generation and cancellation process which occurs with interlaced configurations. They are also used in a theoretical explanation of the interlacing angle, system parameter symmetry and load balance between interlaced converters. The accuracy of this analytical technique is confirmed by comparing the results with those obtained from a frequency domain model (FDM) of the PWM converter drive

Keywords

AC motor drives; Bessel functions; Fourier series; PWM power convertors; harmonic analysis; railways; traction motor drives; 3-D modulation model; AC input current harmonic spectrum; AC traction motors; Bessel functions; double Fourier series method; frequency domain model; harmonic characteristics; interlaced PWM converters; interlacing angle; load balance; single-phase PWM converter drives; system parameter symmetry; traction PWM converters;

fLanguage

English

Journal_Title

Electric Power Applications, IEE Proceedings -

Publisher

iet

ISSN

1350-2352

Type

jour

DOI

10.1049/ip-epa:19970937

Filename

587415