Determination of temperature distribution on windings of oil transformer based on the laws of heat transfer
Author
Grabko, V. V.
Tkachenko, S. Y.
Palaniuk, O. V.
Грабко, В. В.
Ткаченко, С. Й.
Паланюк, О. В.
Date
2021Metadata
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Abstract
The object of research: development of a technology for determining the temperature of the
winding of a power oil transformer, in particular, the analysis of thermal processes in the winding
of a power transformer during short-term overloads, taking into account the influence of
the environment.
Investigated problem: temperature distribution in the winding of a power oil transformer
taking into account short-term load surges in the problem of assessing the residual life of the
insulation of the transformer winding by temperature aging. The calculation of the temperature
distribution in the winding was carried out using the passport data and characteristics of the
power oil transformer, including the winding, transformer oil, load currents.
The main scientific results: mathematical model was calculated, with the help of which the
results of temperature distribution in the transformer winding were obtained during short-term
load surges or constant work with an increased load. According to the presented model, the
analysis of the cooling time of the transformer winding after short-term overloads is carried out.
Comparing the results obtained on the simulation model with the known results of experimental
studies of the temperature distribution in the winding of a power transformer, the adequacy of
the mathematical model is proved. It is shown that the use of the laws of heat transfer in a homogeneous
plate to analyze the temperature distribution in the transformer winding is not wrong,
but requires clarifications and simplifications.
The area of practical use of the research results: enterprises of the machine-building industry
and energy companies specializing in the production and operation of transformer equipment.
Innovative technological product: simulation model of heat distribution in a transformer
winding, which can take into account the load of the transformer, the effect of the environment
on the insulation of the transformer windings.
Innovative technological product: a method for diagnosing the duration of the non-failure
operation of a transformer, which makes it possible to ensure trouble-free operation and save
money for the repair of transformer equipment.
Scope of the innovative technological product: design and development of diagnostic systems
for windings of power oil transformers.
Please use this identifier to cite or link to this item:
http://ir.lib.vntu.edu.ua//handle/123456789/34936