Average temperature of oil-filled transformer windings with partial cooling ducts
Mar 18, 2021
About this article
Published Online: Mar 18, 2021
Page range: 35 - 39
Received: Dec 27, 2020
DOI: https://doi.org/10.2478/jee-2021-0005
Keywords
© 2021 Peter Bokes, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
An effective one-dimensional model is presented that describes the temperature profile of a winding of an oil-filled distribution transformer with an arbitrary number of partial cooling ducts. An analytical solution of the model is applied to a specific example — a low voltage winding of a 400 kVA distribution transformer with one or two partial cooling ducts. Starting from the exact solution, a simple and practical formula for the temperature rise of similar windings has been derived that is suitable for transformer designers.