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Cited by 51Advanced DC-DC ConvertersHigh voltage insulation and dielectric phenomenaPower Transformer Diagnostics and Insulation

The DOI matches its Crossref record; 1 of the 1 references it cites were found in a registry or an index.

Novel insulation concept for an MV dry-cast medium-frequency transformer

Gradinger, Thomas B., Drofenik, Uwe, Alvarez, Silverio·2017·2017 19th European Conference on Power Electronics and Applications (EPE'17 ECCE Europe)
DOI 10.23919/epe17ecceeurope.2017.8099006
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Abstract

A 240 kVA, 10 kHz medium-frequency transformer (MFT) to be used in MV DC/DC conversion was developed. The transformer has separately dry-cast windings and was designed for DC system voltages up to 50 kV. For dimensioning and optimization, a MATLAB-based tool was used, containing fast models for electromagnetic, insulation, and thermal design, as well as losses in windings and core. Starting from a small set of primary parameters, a particular MFT design is completed, and an optimization parameter is determined, containing specific MFT cost and size. Automatic optimization is achieved by sweeping over the space of primary parameters, using meshes of increasing resolution. The optimal MFT design was verified and the field grading analyzed in more detail using 3-d electrostatic simulation. Prototypes were built and the insulation was experimentally verified by 70 kV AC and 150 kV lightning impulse tests. Careful field grading and insulation of the HV connections are key to avoid discharges in air up to the PD test voltage, flashovers, and discharges to the nearby grounded components of the MFT. The experimental verification included thermal tests that demonstrated the attractive combination of small air-insulation distances and efficient air cooling of the chosen MFT concept.

Overview

Integrity signals

Registry

Crossref · 10.23919/epe17ecceeurope.2017.8099006

Cites

1 of 1 references verified0 citation errors · 0 not checkable

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Citations

Cites

Research works printed but not linked: 18

  1. 10.7251/ELS1216050D · DOI
  2. 10.1109/IECON.2012.6389544 · DOI
  3. 10.1109/TPEL.2013.2259264 · DOI
  4. reinold, 1999, Characterization of Semiconductor Losses in Series Resonant DC-DC Converters for High Power Applications Using Transformers with Low Leakage Inductance, EPE'99 Lausanne Switzerland
  5. hoffmann, 2011, Medium Frequency Transformer in Resonant Switching DC/DC-Converters for Railway Applications, EPE-ECCE Birmingham United Kingdom
  6. claessens, 0, Traction Transformation, A Power-Electronic Traction Transformer (PETT), ABB-Review 2012
  7. 10.1109/63.602560 · DOI
  8. 10.1007/978-3-540-78413-5 · DOI
  9. petcharaks, 1995, Application of the Streamer Breakdown Criterion to Inhomogeneous Gas Gaps dissertation ETH Zürich
  10. stephan, 2010, VDI Heat Atlas, VDI-Gesellschaft Verfahrenstechnik und Chemieingenieurwesen (GVC)
  11. 10.1109/PESC.2004.1355834 · DOI
  12. 10.1109/SPEEDAM.2014.6871956 · DOI
  13. engel, 2003, 15 kV/16.7 Hz Energy Supply System with Medium Frequency Transformer and 6.5 kV IGBTs in Resonant Operation, EPE Toulouse France
  14. 10.1109/EPE.2015.7309376 · DOI
  15. 10.1109/PESC.2004.1355234 · DOI
  16. drofenik, 2012, A 150 kW Medium Frequency Transformer Optimized for Maximum Power Density, CIPS Nürnberg Germany
  17. kolar, 2012, Solid State Transformer Concepts in Traction and Smart Grid Applications, EPE-PEMC Novi Sad Serbia
  18. 10.1109/EPE.2007.4417570 · DOI · Paper page

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Metadata

Authors
Gradinger, T. B., Drofenik, U., & Alvarez, S.
Affiliations
ABB (Switzerland) (CH)
Venue
2017 19th European Conference on Power Electronics and Applications (EPE'17 ECCE Europe)
Publisher
IEEE
Published
2017-09
Pages
P.1-P.10
DOI
10.23919/epe17ecceeurope.2017.8099006
OpenAlex
W2769812678
Cited by
51
References
1
Citations by year
2026: 6 · 2025: 2 · 2024: 15 · 2023: 7 · 2022: 5 · 2021: 6 · 2020: 2 · 2019: 4 · 2018: 4
FWCI
3.87
Type
conference paper
Language
en
Open access
closed
Locations
European Conference on Power Electronics and Applications (publishedVersion)
Topics
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Advanced DC-DC Converters
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › High voltage insulation and dielectric phenomena
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Power Transformer Diagnostics and Insulation
Keywords
medium frequency transformer, insulation design, field grading, electrostatic simulation, lightning impulse test, partial discharge, flashover, air cooling, thermal design, design optimization

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