Constant frequency control of an Active Power Filter

Autor:	S. G. Abeyaratne, G. Ramtharan, A. Atputharajah
Rok vydání:	2006
Předmět:	Multidisciplinary Offset (computer science) Computer science Control theory Integrator Power electronics Optimum "L" filter Waveform Network topology Electronic filter Voltage
Zdroj:	Journal of the National Science Foundation of Sri Lanka. 34:21
ISSN:	2362-0161 1391-4588
DOI:	10.4038/jnsfsr.v34i1.2072
Popis:	Acrive Power Filrers (APFs) improve the elecrriciry supply by correcting harmonic distortions created by non-linear lodds. It also corrects the poor power-facror resulring from inductive loads. Topologies and control techniques available for APFs are numerous. This paper considers a single phase APF. A scheme rhac requires minimum calculation burden has been selected. The system considered, uses an unified constant frequency integrarion control that gives a minimum calculation burden and fasrer response. The control method adapted requires sensing rhe load currenr and DC-link volr~ge only. However, it causes some problems at the integrarion level. The analog integrator gives some initi~l voltage when opel-ated ar high frequencies due ro insblliry to reset the inregcator fully. To avoid errors due to offset in rhe integrator, an offser feedback is proposed and tested in rhis study. The conrl-ol is siniulared and rhe results 2r.e validxed wirh laboratory esperimrn~al waveforms.
Databáze:	OpenAIRE
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