NDLI: A multi-level thyristor rectifier with improved power factor

Content Provider	IEEE Xplore Digital Library
Author	Zargari, N.R. Yuan Xiao Bin Wu
Copyright Year	1996
Description	Author affiliation: Allen-Bradley Co., Cambridge, Ont., Canada (Zargari, N.R.)
Abstract	The thyristor bridge rectifier is a reliable and cost effective topology commonly used in medium voltage applications. Low and load varying input displacement factor (IDF) and poor input harmonic current profile are the main drawbacks of this topology and are gaining more and more importance. This paper proposes modification of a conventional (18 pulse) thyristor rectifier to achieve higher power factor. The proposed topology employs one GTO device across each upper bridge to short them out when necessary, hence lowering the voltage level, decreasing the delay angle and improving the power factor. In medium voltage (4160 V) AC drives, usually 3 devices are connected in series to withstand the voltage, therefore the 18 pulse configuration has the same number of SCRs as compared to a 6 pulse bridge. The paper includes analysis, simulation, and a comparison of the proposed topology with the conventional 6, 12 and 18 pulse thyristor bridges. Experimental results from a 10 kVA 12 pulse system verify the feasibility of the proposed topology.
Starting Page	967
Ending Page	972
File Size	544176
Page Count	6
File Format	PDF
ISBN	0780335449
ISSN	01972618
DOI	10.1109/IAS.1996.560199
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1996-10-06
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Thyristors Reactive power Costs Rectifiers Bridge circuits Medium voltage Switches Topology Pulse transformers Delay
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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