Sensitivity study on influencing parameters of transformer thermal model with directed oil flow
The thermal design of a power transformer has to keep the temperature within limits according to international agreement standards. Two of the limits are a maximum temperature rise and a maximum oil temperature. The purpose of this study was to study the temperature distributions and oil veloci...
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| Main Author: | |
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| Format: | Thesis |
| Language: | English English English |
| Published: |
2013
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/6709/1/24p%20NIK%20MOHD%20AZRI%20NIK%20SUPIAN.pdf http://eprints.uthm.edu.my/6709/2/NIK%20MOHD%20AZRI%20NIK%20SUPIAN%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/6709/3/NIK%20MOHD%20AZRI%20NIK%20SUPIAN%20WATERMARK.pdf |
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| Summary: | The thermal design of a power transformer has to keep the temperature within limits
according to international agreement standards. Two of the limits are a maximum
temperature rise and a maximum oil temperature. The purpose of this study was to study
the temperature distributions and oil velocity inside coil of the power transformer and to
model and develop a program using MATLAB that can modulate the suitable parameter
that not exceeds maximum temperature rise in disk coil transformer. Two methods have
been used to study the velocity and temperature parameters affecting the oil flow
through the transformer. The first approach focused on equation derived from previous
worked about oil flow and temperature distribution. The second approach was to handle
the problem as a global optimization problem solved by numerical methods. The
optimization was done using predictions from a program used for velocity and
temperature calculation. The numerical method result was successful; on all the designs
tested it gave a lower temperature rise value according to international agreement
standards. Test the program by using different value in the parameter have been tested
on sensitivity of study. The study has shown that a geometrical detail approach provided
for better design solutions in reasonable time and therefore has shown its potential for
practical use. Both the methods could be combined and used for further investigation. |
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