Resonances in a high-power active-front-end rectifier system
Rodriguez, J.R.
Pontt, J.
Huerta, R.
Alzamora, G.
Becker, N.
Kouro, S.
Cortes, P.
Lezana, P.
Dept. de Electron., Univ. Tecnica Federico Santa Maria, Valparaiso, Chile;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: April 2005
Volume: 52,
Issue: 2
On page(s): 482- 488
ISSN: 0278-0046
INSPEC Accession Number: 8351108
Digital Object Identifier: 10.1109/TIE.2005.843907
Current Version Published: 2005-04-04
Abstract
This paper presents the application of high-power three-level active-front-end rectifiers to regenerate energy in a downhill conveyor system. The selective harmonic elimination method is used to eliminate harmonics 11 and 13, working with very low switching frequency, where six-pulse harmonic orders 6k±1 are eliminated by the delta-wye connection of the transformer. In this way, the input current at the mains is highly sinusoidal with small harmonics starting at frequencies of order 23 and 25. Resonances have been detected, originated mainly by the capacitances of feeding cables and noneliminated harmonics, which produce high-voltage distortion. Theoretical and field measurements present the problem and the solution by using a specially designed high-pass power filter.
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