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Highly reliable and efficient voltage optimizer based on direct PWM AC-AC buck converter
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Wang, Jianguo and McMahon, Richard A. (2020) Highly reliable and efficient voltage optimizer based on direct PWM AC-AC buck converter. IEEE Transactions on Energy Conversion . doi:10.1109/TEC.2020.2995669 (In Press)
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WRAP-highly-reliable-efficient-voltage-optimizer-based-direct-PWM-AC-AC buck-converter-Wang-2020.pdf - Accepted Version - Requires a PDF viewer. Download (6Mb) | Preview |
Official URL: http://dx.doi.org/10.1109/TEC.2020.2995669
Abstract
A voltage optimizer (VO) to regulate overrated electricity supply voltages to optimized values with high reliability and efficiency has been developed based on a direct PWM ac-ac buck converter. A comprehensive control strategy is proposed for the ac-ac converter to address existing commutation problems and also to offer a fault handling capability against short circuits. A number of switching states are defined depending on the input voltage, whereby continuous and reliable current paths are maintained at all times especially around voltage zero-crossing points, and safe transitions between them are achieved as well. Based on a detailed power loss analysis, a hybrid scheme with silicon carbide (SiC) MOSFETs and silicon IGBTs is proposed which significantly improves the efficiency while minimizes the cost, and simultaneously enables the use of a high switching frequency, with the potential to reduce the volume of a VO. Results from simulation and experiment confirm that the proposed strategies give reliable operation of the VO with an efficiency higher than 99%.
| Item Type: | Journal Article | ||||||||
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| Subjects: | Q Science > QC Physics T Technology > TK Electrical engineering. Electronics Nuclear engineering T Technology > TP Chemical technology |
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| Divisions: | Faculty of Science > WMG (Formerly the Warwick Manufacturing Group) | ||||||||
| Library of Congress Subject Headings (LCSH): | AC-to-AC converters, Silicon carbide, Power electronics, Short circuits, Electric apparatus and appliances -- Protection | ||||||||
| Journal or Publication Title: | IEEE Transactions on Energy Conversion | ||||||||
| Publisher: | IEEE | ||||||||
| Official Date: | 19 May 2020 | ||||||||
| Dates: |
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| Date of first compliant deposit: | 28 May 2020 | ||||||||
| DOI: | 10.1109/TEC.2020.2995669 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | In Press | ||||||||
| Publisher Statement: | © 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. | ||||||||
| Access rights to Published version: | Restricted or Subscription Access |
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