A novel approach to investigate the hot-spot temperature rise in power transformers

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

Research output: Journal article publicationJournal articleAcademic researchpeer-review

44 Citations (Scopus)


For large power transformers, the hot-spot temperature rise in their structural parts is an essential issue to address. Computation of the hot-spot temperature rise is, however, a complicated engineering problem because of the uneven loss distribution and effect of internal oil flow upon the convective heat transfer coefficients on the body surfaces of transformers. This paper presents a novel approach to compute and analyze the hot-spot temperature rise of the structural parts for an ODFS-334 MVA/500 kV single-phase auto-transformer. The surface convection heat transfer coefficients, which are computed based on computational fluid dynamics, are used as the boundary conditions of the magnetic-thermal coupling analysis using finite-element method. To validate the feasibility and applicability of the proposed method, the numerical results obtained from the proposed method are compared with those of experimental ones.
Original languageEnglish
Article number7093471
JournalIEEE Transactions on Magnetics
Issue number3
Publication statusPublished - 1 Mar 2015


  • Computational fluid dynamics (CFD)
  • convection heat transfer coefficient
  • hot-spot temperature rise
  • magneticthermal coupling

ASJC Scopus subject areas

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


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