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access icon openaccess Prediction of oil flow and temperature distribution of transformer winding based on multi-field coupled approach

  • Author(s): Longnv Li 1, 2 ; Wei Liu 1 ; Hai Chen 1 ; Xiaoming Liu 1
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  • Source: Volume 2019, Issue 16, March 2019, p. 2007 – 2012
    DOI:  10.1049/joe.2018.8718 , Online ISSN 2051-3305
This is an open access article published by the IET under the Creative Commons Attribution-NonCommercial-NoDerivs License (http://creativecommons.org/licenses/by-nc-nd/3.0/)
Received 28/08/2018, Accepted 19/09/2018, Published 24/10/2018

For large oil-filled transformers, the oil flow and temperature distribution in transformer windings are an essential issue to be addressed. However, the computation of the oil flow and temperature distribution is a complicated engineering problem because of the complex physical structure of the winding area and the coupled effect of electromagnetic, fluid and thermal fields. This study presents a multi-filed coupled approach to compute and analyse the oil flow and temperature distribution of the winding area for an ODFS-334 MVA/500 kV single-phase auto-transformer. The eddy current losses of the transformer winding discs are computed based on the combined finite element and analytical method, and the computational fluid dynamics based on 3D fluid-thermal coupled method is used to calculate the oil flow and temperature properties of the prototype. The computation of the oil flow and temperature distribution reveals accurately the hot spot of the transformer. To validate the feasibility and applicability of the proposed method, the numerical results obtained using the proposed method are compared with those of the experimental ones.

Inspec keywords: temperature distribution; computational fluid dynamics; eddy current losses; autotransformers; finite element analysis; transformer windings; power transformers

Other keywords: analytical method; finite element method; single-phase auto-transformer; eddy current losses; transformer windings; multifield coupled approach; 3D fluid-thermal coupled method; voltage 500.0 kV; oil-filled transformers; transformer winding discs; electromagnetic field effects; thermal field effects; computational fluid dynamics; temperature distribution; winding area; oil flow

Subjects: Fluid mechanics and aerodynamics (mechanical engineering); Numerical analysis; General fluid dynamics theory, simulation and other computational methods; Numerical approximation and analysis; Finite element analysis; Applied fluid mechanics; Electromagnetic induction; Transformers and reactors

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