NDLI: 24-Pulse active front end rectifier with low switching frequency

Content Provider	IEEE Xplore Digital Library
Author	Rodriguez, J. Pontt, J. Huerta, R. Newman, P.
Copyright Year	2004
Description	Author affiliation: Dept. of Electron., Tech. Univ. Fed. Santa Maria, Valparaiso, Chile (Rodriguez, J.; Pontt, J.; Huerta, R.; Newman, P.)
Abstract	High-power medium voltage converters face the issues of the network interaction, reliability and efficiency. In addition, 4-quadrant operation is needed for FACTS, distributed generation and regenerative drive systems. This work presents a 24-pulse active-front-end rectifier (AFE) with low switching frequency. The system has four units, each one configured with a three-phase three-level NPC AFE rectifier (3LAFE). The 24-pulse behavior is built by the transformers' connection with /spl plusmn/7.5/spl deg/-degree displacement at the primary side. For achieving low switching frequency, a modulation pattern based on a selective harmonic elimination PWM technique (SHEPWM) is employed. With only 3 switching angles, the lowest injected harmonic orders are the 47/sup th/ and 49/sup th/. Simulated and experimental results show the good performance at the mains side with unity power factor and low harmonic distortion. Further reduction of remaining 47/sup th/ and 49/sup th/ harmonic orders is discussed. This solution may be applied in high-power regenerative systems like downhill conveyors, mill drives and windmills, allowing the improvement of the overall system efficiency and the reduction of size and cost of large power harmonic filters.
Sponsorship	IEEE Power Electon. Soc
Starting Page	3517
Ending Page	3523
File Size	382372
Page Count	7
File Format	PDF
ISBN	0780383990
ISSN	02759306
DOI	10.1109/PESC.2004.1355097
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-06-20
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Rectifiers Switching frequency Power harmonic filters Pulse width modulation Medium voltage Distributed control Drives Transformers Frequency modulation Reactive power
Content Type	Text
Resource Type	Article

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