Harmonic-free line-commutated ac/dc rectifiers

In this paper both a method and apparatus are applied to different configurations of line-commutated ac/dc rectifiers to reduce the distortion of currents flowing from the ac supply. The load may be either inductive or capacitive. The technology involves an accurate shaping of the dc current by usin...

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Bibliographic Details
Published in:Electric power systems research 2009-11, Vol.79 (11), p.1531-1537
Main Author: Villablanca, Miguel E.
Format: Article
Language:English
Subjects:
Ac/dc rectifiers
Applied sciences
Connection and protection apparatus
Electrical engineering. Electrical power engineering
Electronics
Exact sciences and technology
Harmonics
Other multijunction devices. Power transistors. Thyristors
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Thyristors
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Summary:In this paper both a method and apparatus are applied to different configurations of line-commutated ac/dc rectifiers to reduce the distortion of currents flowing from the ac supply. The load may be either inductive or capacitive. The technology involves an accurate shaping of the dc current by using two self-commutated switches. This dc-current shaping is reflected back into the shaping of the ac input currents, which become pure sine waves. Thyristor-based rectifying operation is possible with a simple control circuit, which is able to deal with both rapid load variations and failures in the self-commutated switches. Furthermore, the overlap conduction of bridge thyristors is eliminated completely. Experimental verification is provided from a 400-V 30-kVA 50-Hz laboratory prototype.
ISSN:0378-7796
1873-2046
DOI:10.1016/j.epsr.2009.05.006