Design of a modular, high step-up ratio DC–DC converter for HVDC applications integrating offshore wind power

Yihua Hu, Rong Zeng, Wenping Cao, Jiangfeng Zhang, Stephen J. Finney

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

High power and high voltage gain DC-DC converters are key to high-voltage DC (HVDC) power transmission for offshore wind power. This paper presents an isolated ultra-high step-up DC-DC converter in matrix transformer configuration. A flyback-forward converter is adopted as the power cell and the secondary side matrix connection is introduced to increase the power level and to improve fault tolerance. Because of the modular structure of the converter, the stress on the switching devices is decreased and so is the transformer size. The proposed topology can be operated in column interleaved modes, row interleaved modes and hybrid working modes in order to deal with the varying energy from the wind farm. Furthermore, fault tolerant operation is also realized in several fault scenarios. A 400-W DC-DC converter with four cells is developed and experimentally tested to validate the proposed technique, which can be applied to high-power high-voltage DC power transmission.
LanguageEnglish
Number of pages12
JournalIEEE Transactions on Industrial Electronics
Early online date22 Dec 2015
DOIs
Publication statusE-pub ahead of print - 22 Dec 2015

Fingerprint

DC power transmission
DC-DC converters
Wind power
Electric potential
Fault tolerance
Farms
Topology

Keywords

  • DC-DC converter
  • HVDC
  • high step up
  • matrix transformer
  • topology

Cite this

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title = "Design of a modular, high step-up ratio DC–DC converter for HVDC applications integrating offshore wind power",
abstract = "High power and high voltage gain DC-DC converters are key to high-voltage DC (HVDC) power transmission for offshore wind power. This paper presents an isolated ultra-high step-up DC-DC converter in matrix transformer configuration. A flyback-forward converter is adopted as the power cell and the secondary side matrix connection is introduced to increase the power level and to improve fault tolerance. Because of the modular structure of the converter, the stress on the switching devices is decreased and so is the transformer size. The proposed topology can be operated in column interleaved modes, row interleaved modes and hybrid working modes in order to deal with the varying energy from the wind farm. Furthermore, fault tolerant operation is also realized in several fault scenarios. A 400-W DC-DC converter with four cells is developed and experimentally tested to validate the proposed technique, which can be applied to high-power high-voltage DC power transmission.",
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Design of a modular, high step-up ratio DC–DC converter for HVDC applications integrating offshore wind power. / Hu, Yihua; Zeng, Rong; Cao, Wenping; Zhang, Jiangfeng; Finney, Stephen J.

In: IEEE Transactions on Industrial Electronics, 22.12.2015.

Research output: Contribution to journalArticle

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AU - Zhang, Jiangfeng

AU - Finney, Stephen J.

N1 - (c) 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, 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 components of this work in other works

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