Staff Members - Benha University
Predicting Transformer Temperature Rise and Loss of Life in the Presence of Harmonic Load Currents
Ain Shams Engineering Journal • 2012
Publication Information
Authors
O.E. Gouda , G.M. Amer , W.A.A. Salem
Keywords
Hot spot temperature;
Power transformer;
Top oil;
Thermal model
Journal
Ain Shams Engineering Journal
Publisher
Not Available
Volume
Not Available
Issue
Not Available
Pages
Not Available
publication.type
International
Paper Link
Open Link
Supplementary Materials
Not Available
Abstract
Power transformers represent the largest portion of capital investment in transmission
and distribution substations. One of the most important parameters governing a transformer’s life
expectancy is the hot spot temperature value. The aim of this paper is to introduce hot-spot and
top-oil temperature model as top oil and hot spot temperature rise over ambient temperature model
and thermal model under liner and non-linear loads. For more accurate temperature calculations, in
this paper thermal dynamic model by MATLAB is used to calculate the power transformer temperature.
The hot spot, top oil and loss life of power transformer under harmonics load are calculated.
The measured temperatures of 25 MVA, 66/11 kV, ONAF cooling temperatures are compared with
the suggested dynamic model.
and distribution substations. One of the most important parameters governing a transformer’s life
expectancy is the hot spot temperature value. The aim of this paper is to introduce hot-spot and
top-oil temperature model as top oil and hot spot temperature rise over ambient temperature model
and thermal model under liner and non-linear loads. For more accurate temperature calculations, in
this paper thermal dynamic model by MATLAB is used to calculate the power transformer temperature.
The hot spot, top oil and loss life of power transformer under harmonics load are calculated.
The measured temperatures of 25 MVA, 66/11 kV, ONAF cooling temperatures are compared with
the suggested dynamic model.