NDLI: Effects of Voltage Supply Unbalance on AC Harmonic Current Components Produced by AC/DC Converters

Content Provider	IEEE Xplore Digital Library
Author	de Oliveira, S.E.M. Guimaraes, J.O.R.
Copyright Year	1986
Abstract	This paper examines the main factors affecting amplitudes of the harmonic current components generated by HVDC converters operating under unbalanced voltage supply. A symmetrical firing scheme is considered and emphasis is placed on operation of the six-pulse full bridge rectifiers, which are used as the basic arrangement for assembling the twelve pulse converter widely used in HVDC transmission and as a field voltage supply for synchronous generators in large power plants. Several computer simulation results are shown in order to illustrate the effect produced by the unbalanced voltage supply on the characteristic ac harmonic current magnitudes when considering different operating conditions characterized by changes on dc current amplitudes and on the firing delay angle. Special attention is placed on the noncharacteristic triple harmonic currents arisen basically as a result of the different commutation time on phase currents produced by the negative sequence components of the phase-to-phase voltages.
Sponsorship	IEEE Power Engineering Society
Starting Page	2498
Ending Page	2507
Page Count	10
File Size	375458
File Format	PDF
ISSN	08858977
Volume Number	22
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-10-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Voltage DC-DC power converters HVDC transmission Bridge circuits Rectifiers Assembly Synchronous generators Power generation Computer simulation Delay effects unbalanced voltages Characteristic harmonics harmonic analysis noncharacteristic harmonics symmetrical firing scheme
Content Type	Text
Resource Type	Article
Subject	Energy Engineering and Power Technology Electrical and Electronic Engineering

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