NDLI: An Active Voltage Quality Regulator with variable dc-bus voltage topology

Content Provider	IEEE Xplore Digital Library
Author	Guochun Xiao Zhiliang Hu Lei Zhang Beihai Chen Zhaoan Wang
Copyright Year	2008
Description	Author affiliation: Sch. of Electr. Eng., Xi'an Jiaotong Univ., Xian (Guochun Xiao; Zhiliang Hu; Lei Zhang; Beihai Chen; Zhaoan Wang)
Abstract	The active voltage quality regulator (AVQR) is an equipment designed to mitigate the long-term voltage disturbance, such as undervoltage, overvoltage and voltage harmonics etc. For the existing AVQR topology, the dc-bus voltage is either uncontrolled or controlled to a constant value, and it can not vary with the missing voltage variation. When the missing voltage is small, the corresponding and required dc-bus voltage should be small as well. But in the existing topology, the dc-bus voltage usually keep very high. Therefore, the duty ratio of the inverter is very small and then the efficiency is very low. In order to overcome its drawbacks, a new AVQR topology is proposed in which the diode-rectifier is replaced by the thyristor-rectifier in this paper. Then for the sake of show the advantage of the proposed topology, the dc-bus voltage in the both topologies (uncontrolled or controlled) are compared by simulations. Through comparative analysis, the proposed topology is proven to be better than the existing topology, especially on a large missing voltage variation. At last, the validity and effectiveness of the proposed topology and control strategy are also verified by the laboratory experimental results. In a case, under the same supply voltage and load conditions, the efficiency increases from 89.1% of uncontrolled dc-bus voltage to 96.1% of controlled dc-bus voltage on a 2 kVA prototype, so the efficiency is increased significantly.
Starting Page	932
Ending Page	937
File Size	282539
Page Count	6
File Format	PDF
ISBN	9781424416677
ISSN	02759306
DOI	10.1109/PESC.2008.4592049
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-06-15
Publisher Place	Greece
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Voltage control Topology Capacitors Inverters Thyristors Regulators Rectifiers Efficiency Active Voltage Quality Regulator(AVQR) Transformerless Power Quality Variable dc-bus voltage
Content Type	Text
Resource Type	Article

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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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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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