Effectivity reduction of PWM-converter based dynamic filter by signal processing delay

Author

le Roux, W. ; van Wyk, J.D.

Author_Institution

Ind. Electron. Res. Group, Rand Afrikaans Univ., Johannesburg, South Africa

Volume

2

fYear

1999

fDate

1999

Firstpage

1222

Abstract

The nonnegligible time it takes to sample voltages and currents, and to perform some signal processing on the digitized signals to calculate the reference current for a PWM-converter based dynamic filter, results in a time lag of this reference. The consequence of this normally neglected effect is a surprising distortion of the ideal compensated line current. This paper investigates and evaluates this error, proposes a model for studying and analyzing this effect, and presents experimental results to substantiate the analysis

Keywords

PWM power convertors; active filters; delays; power filters; signal processing; switching circuits; PWM-converter; PWM-converter based dynamic filter; current sampling; digitized signals; effectivity reduction; ideal compensated line current distortion; reference current; signal processing; signal processing delay; time lag; voltage sampling; Active filters; Delay effects; Digital signal processors; Industrial electronics; Power harmonic filters; Pulse width modulation; Rectifiers; Signal processing; Signal sampling; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Specialists Conference, 1999. PESC 99. 30th Annual IEEE

Conference_Location

Charleston, SC

ISSN

0275-9306

Print_ISBN

0-7803-5421-4

Type

conf

DOI

10.1109/PESC.1999.785668

Filename

785668