Large step ratio input-series-output-parallel chain-link DC-DC converter
File(s)
Accepted version
Author(s)
Type
Journal Article
Abstract
High-voltage and high-power dc-dc conversion is key to dc transmission, distribution and generation, which require compact and efficient dc transformers with large step ratios. This paper introduces a dc-dc converter with the input-series-output-parallel (ISOP) arrangement of multiple high step ratio sub-converter units. Each sub-converter unit is an isolated modular dcdc converter with a stack of half-bridge cells chopping the dc down to low voltage level. The transformer provides galvanic isolation and additional step ratio. The converter achieves a large step ratio due to the combination of the series-parallel configuration, the modular cells, and the isolation transformer. The proposed dc-dc converter is analyzed in a 30 kV to 1 kV, 1 MW application to discuss the operation performance, trade-offs, power efficiency and selection of components. Finally, the converter is validated through a laboratory down-scaled prototype.
Date Issued
2019-05
Date Acceptance
2018-07-27
Citation
IEEE Transactions on Power Electronics, 2019, 5 (5), pp.4125-4136
ISSN
0885-8993
Publisher
Institute of Electrical and Electronics Engineers
Start Page
4125
End Page
4136
Journal / Book Title
IEEE Transactions on Power Electronics
Volume
5
Issue
5
Copyright Statement
© 2018 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.
Sponsor
Engineering & Physical Science Research Council (EPSRC)
Identifier
https://ieeexplore.ieee.org/document/8423720
Grant Number
EP/K036327/1
Subjects
Science & Technology
Technology
Engineering, Electrical & Electronic
Engineering
DC transformer
large step ratio
medium-voltage converter
modular multilevel converter (MMC)
MODULAR MULTILEVEL CONVERTER
RESONANT CONVERTER
HVDC
OPERATION
MVDC
0906 Electrical and Electronic Engineering
Electrical & Electronic Engineering
Publication Status
Published
Date Publish Online
2018-07-30