Open AccessPrediction of oil flow and temperature distribution of transformer winding based on multi‐field coupled approach
Author(s) -
Li Longnv,
Liu Wei,
Chen Hai,
Liu Xiaoming
Publication year - 2019
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2018.8718
Subject(s) - transformer , computation , electromagnetic coil , eddy current , finite element method , mechanics , thermal , distribution transformer , fluid dynamics , materials science , mechanical engineering , computer science , electrical engineering , engineering , physics , voltage , thermodynamics , structural engineering , algorithm
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.