Title :
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
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;
Conference_Titel :
Power Electronics Specialists Conference, 1999. PESC 99. 30th Annual IEEE
Conference_Location :
Charleston, SC
Print_ISBN :
0-7803-5421-4
DOI :
10.1109/PESC.1999.785668
