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Author Aredes, M. ♦ Fernandes, R.M.
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©2009
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Physics ♦ Electricity & electronics ♦ Technology ♦ Engineering & allied operations ♦ Applied physics
Subject Keyword Voltage fluctuations ♦ Power system harmonics ♦ Topology ♦ Steady-state ♦ Voltage control ♦ Power Quality ♦ Power harmonic filters ♦ Active Filters ♦ System performance ♦ Power quality ♦ Unified Power Quality Conditioner ♦ Active filters ♦ Frequency
Abstract Configurations of combined series and shunt active filters, also known as Unified Power Quality Conditioners (UPQCs), are designed for simultaneous compensation of voltage and current harmonics and imbalances. Sometimes, compensation of voltage sag/swell is also included as additional functionality of the UPQC. Traditionally, the shunt active filter of the UPQC behaves as a controlled current source that compensates the load current, whereas the series active filter behaves as a controlled voltage source that compensates the supply voltage. Here, a dual configuration of UPQC, hereafter called as iUPQC, is presented. In contrast to the conventional approach of UPQC, the shunt active filter of the new iUPQC behaves as an ac voltage source and the series one as an ac current source. An advantage of the iUPQC over traditional UPQCs is the fact of having fundamental positive-sequence currents and voltages references for the series and shunt active filters, respectively. Contrarily, conventional approaches of UPQC must deal with nonsinusoidal compensating voltage and current references, with aleatoric frequency spectra. In this case, it is impossible to practically unsure zero steady-state errors in all frequency components. Beside all those compensation characteristics of the UPQC, the iUPQC can also keep the voltage at load terminal tracking its referential values, according to the desired specifications. In other words, the iUPQC has voltage sag/swell compensation capability, with fast response, comparable to that of a Dynamic Voltage Restorer (DVR). The basic control strategy and an improved version are presented and the system performance is compared through simulations. Finally, experimental results are presented to validate the proposed iUPQC controller.
Description Author affiliation: UFRJ¿Federal University of Rio de Janeiro, COPPE¿Graduate School of Engineering, Rio de Janeiro, Brazil (Aredes, M.) || ENELTEC¿Energia Elétrica e Tecnologia, Rio de Janeiro, Brazil (Fernandes, R.M.)
ISBN 9781424444328
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research ♦ Reading
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2009-09-08
Publisher Place Spain
Size (in Bytes) 709.32 kB
Page Count 10
Starting Page 1
Ending Page 10


Source: IEEE Xplore Digital Library