Numerical analysis and optimization of lobe-type magnetic shielding in a 334 MVA single-phase auto-transformer

Longnv Li, Weinong Fu, Siu Lau Ho, Shuangxia Niu, Yan Li

Research output: Journal article publicationJournal articleAcademic researchpeer-review

18 Citations (Scopus)


In this paper, the influences of the lobe-type magnetic shielding in a transformer in terms of its leakage fields, stray losses in structural parts, shielding losses, and short-circuit impedance are examined using 3-D non-linear frequency-domain finite element method. An ODFS-334 MVA/500 kV single-phase auto-transformer is used as the prototype model under study. The magnetic shielding geometry of the transformer is optimized with its stray losses minimized based on 3-D non-linear finite element analysis. To validate the feasibility of the proposed model and method, experimental data and simulation results are compared and reported.
Original languageEnglish
Article number6971762
JournalIEEE Transactions on Magnetics
Issue number11
Publication statusPublished - 1 Nov 2014


  • Auto-transformer
  • lobe-type magnetic shielding
  • short-circuit impedance
  • stray losses

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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