Line interharmonic currents in frequency changers

Author

Graham, A. David

Author_Institution

Stoyerman Controls Ltd., Twyford, UK

Volume

2

fYear

1998

fDate

14-18 Oct 1998

Firstpage

749

Abstract

Harmonic studies of power rectifiers usually ignore the noninteger harmonics because there is no agreed method of either calculating them or measuring them. This paper shows one way of estimating the DC side current harmonics of a frequency changer and converting them to the AC line current harmonics with the aid of the current switching function. This method is extended to characteristic and noncharacteristic DC harmonics to enable the AC line current to be reconstructed including the integer and noninteger modulation harmonics

Keywords

frequency convertors; power conversion harmonics; rectifying circuits; switching; AC line current harmonics; AC line current reconstruction; DC side current harmonics estimation; characteristic DC harmonics; current switching function; frequency changers; integer modulation harmonics; line interharmonic currents; noncharacteristic DC harmonics; noninteger modulation harmonics; power rectifiers; Commutation; Discrete Fourier transforms; Equations; Frequency estimation; Impedance; Inductors; Inverters; Power system harmonics; Rectifiers; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Harmonics and Quality of Power Proceedings, 1998. Proceedings. 8th International Conference On

Conference_Location

Athens

Print_ISBN

0-7803-5105-3

Type

conf

DOI

10.1109/ICHQP.1998.760137

Filename

760137