Open AccessTemperature rise of a dry‐type transformer with quasi‐3D coupled‐field method
Author(s) -
Liu Chao,
Ruan Jiangjun,
Wen Wu,
Gong Ruohan,
Liao Caibo
Publication year - 2016
Publication title -
iet electric power applications
Language(s) - English
Resource type - Journals
ISSN - 1751-8679
DOI - 10.1049/iet-epa.2015.0491
Subject(s) - electromagnetic coil , transformer , yoke (aeronautics) , mechanics , boundary value problem , thermal , energy efficient transformer , distribution transformer , materials science , engineering , electrical engineering , physics , thermodynamics , mathematics , mathematical analysis , voltage , flight control surfaces , aerodynamics
A quasi‐3D coupled‐field method is introduced and applied on a ventilated dry‐type transformer to study temperature rise of windings in this study. A simplified 3D model was first established to calculate energy loss of core and velocity distribution in a plane above the lower yoke. Then two accurate 2D models were built up to figure out energy losses in the windings. With a combination of indirect and sequential coupling, energy losses of both windings and core were used as heat source, and velocities for both 2D models were applied as boundary condition for analysing fluid‐thermal field. Final results of temperature rise were calculated with temperature rise of two 2D models. In the end, numerical results were compared with experimental data to prove the effectiveness of this method.