Three-Phase Medium-Voltage Medium-Frequency Transformer for SST in Green Hydrogen Production

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Abstract

Green hydrogen production uses renewable energies to energise the electrolysers for hydrogen production. The present paper compares possible solutions and configurations of a medium-frequency transformer (MFT) as part of a solid-state transformer (SST) in green hydrogen production applications. The single-phase and three-phase MFTs are compared and it is shown that a Yd three-phase MFT is the optimum choice for applications that require high power delivery and step-down of the voltage. A summary of previous works about MFT is also provided. Three-phase SST based on modular multilevel converters (MMC) is then described and various cases are investigated to obtain the optimum operational frequency. A 25 MVA, 400 Hz, 25.4 kV / 560V oil-immersed MFT design is presented and is shown that the proposed 400 Hz transformer saves 69% of the active parts' weight compared to a conventional line-frequency transformer (LFT).
Original languageEnglish
Title of host publicationProceedings of the IECON 2023- 49th Annual Conference of the IEEE Industrial Electronics Society
PublisherIEEE
Number of pages6
ISBN (Electronic)979-8-3503-3182-0
ISBN (Print)979-8-3503-3183-7
DOIs
Publication statusPublished - 2023
EventIECON 2023- 49th Annual Conference of the IEEE Industrial Electronics Society - Singapore, Singapore
Duration: 16 Oct 202319 Oct 2023

Publication series

NameProceedings of the Annual Conference of the IEEE Industrial Electronics Society
PublisherIEEE
ISSN (Print)1553-572X
ISSN (Electronic)2577-1647

Conference

ConferenceIECON 2023- 49th Annual Conference of the IEEE Industrial Electronics Society
Country/TerritorySingapore
CitySingapore
Period16/10/2319/10/23

Bibliographical note

Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

  • electrolyzer
  • solid-state transformer
  • mediumfrequency transformer

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