Top-oil temperature model for transformers based on nonlinear thermal resistance, lumped capacitance and thermal-electrical analogy

Top-oil temperature model for transformers based on nonlinear thermal resistance, lumped capacitance and thermal-electrical analogy

Top-Oil Temperature (TOT) is one of the basic components to estimate the Hot-Spot temperature (HST) of the transformers. This paper presents an alternative TOT model based on the heat transfer theory that utilises Nonlinear Thermal Resistance (NTR) and Lumped Capacitance (LC) approaches. It is appli...

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Main Authors: Roslan, Muhammad Hakirin, Azis, Norhafiz, Jasni, Jasronita, Ibrahim, Z.
Format: Article
Language:English
Published: Universiti Putra Malaysia Press 2017
Online Access:http://psasir.upm.edu.my/id/eprint/55855/
http://psasir.upm.edu.my/id/eprint/55855/
http://psasir.upm.edu.my/id/eprint/55855/1/18-JTS%28S%29-0132-2016-4thProof.pdf
id upm-55855
recordtype eprints
spelling upm-558552017-07-05T03:42:30Z http://psasir.upm.edu.my/id/eprint/55855/ Top-oil temperature model for transformers based on nonlinear thermal resistance, lumped capacitance and thermal-electrical analogy Roslan, Muhammad Hakirin Azis, Norhafiz Jasni, Jasronita Ibrahim, Z. Top-Oil Temperature (TOT) is one of the basic components to estimate the Hot-Spot temperature (HST) of the transformers. This paper presents an alternative TOT model based on the heat transfer theory that utilises Nonlinear Thermal Resistance (NTR) and Lumped Capacitance (LC) approaches. It is applied in a thermal-electrical analogy and the heat transfer equivalent equation is determined. This model is tested on a measured TOT of 250 MVA ONAF and 400 MVA ONAF transformers obtained from IEC 60076-7 and previous research. A comparison of TOT is carried out with the existing models IEC 60076-7 exponential and IEEE Loading Guide clause 7 methods. It is found that the thermal model based on the NTR and LC approach could determine the measured TOT closer than the existing methods available in the standards. Universiti Putra Malaysia Press 2017 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/55855/1/18-JTS%28S%29-0132-2016-4thProof.pdf Roslan, Muhammad Hakirin and Azis, Norhafiz and Jasni, Jasronita and Ibrahim, Z. (2017) Top-oil temperature model for transformers based on nonlinear thermal resistance, lumped capacitance and thermal-electrical analogy. Pertanika Journal of Science & Technology, 25 (spec. Feb.). pp. 151-160. ISSN 0128-7680; ESSN: 2231-8526 http://www.pertanika.upm.edu.my/Pertanika%20PAPERS/JST%20Vol.%2025%20(S)%20Feb.%202017/18-JTS(S)-0132-2016-4thProof.pdf
repository_type Digital Repository
institution_category Local University
institution Universiti Putra Malaysia
building UPM Institutional Repository
collection Online Access
language English
description Top-Oil Temperature (TOT) is one of the basic components to estimate the Hot-Spot temperature (HST) of the transformers. This paper presents an alternative TOT model based on the heat transfer theory that utilises Nonlinear Thermal Resistance (NTR) and Lumped Capacitance (LC) approaches. It is applied in a thermal-electrical analogy and the heat transfer equivalent equation is determined. This model is tested on a measured TOT of 250 MVA ONAF and 400 MVA ONAF transformers obtained from IEC 60076-7 and previous research. A comparison of TOT is carried out with the existing models IEC 60076-7 exponential and IEEE Loading Guide clause 7 methods. It is found that the thermal model based on the NTR and LC approach could determine the measured TOT closer than the existing methods available in the standards.
format Article
author Roslan, Muhammad Hakirin
Azis, Norhafiz
Jasni, Jasronita
Ibrahim, Z.
spellingShingle Roslan, Muhammad Hakirin
Azis, Norhafiz
Jasni, Jasronita
Ibrahim, Z.
Top-oil temperature model for transformers based on nonlinear thermal resistance, lumped capacitance and thermal-electrical analogy
author_facet Roslan, Muhammad Hakirin
Azis, Norhafiz
Jasni, Jasronita
Ibrahim, Z.
author_sort Roslan, Muhammad Hakirin
title Top-oil temperature model for transformers based on nonlinear thermal resistance, lumped capacitance and thermal-electrical analogy
title_short Top-oil temperature model for transformers based on nonlinear thermal resistance, lumped capacitance and thermal-electrical analogy
title_full Top-oil temperature model for transformers based on nonlinear thermal resistance, lumped capacitance and thermal-electrical analogy
title_fullStr Top-oil temperature model for transformers based on nonlinear thermal resistance, lumped capacitance and thermal-electrical analogy
title_full_unstemmed Top-oil temperature model for transformers based on nonlinear thermal resistance, lumped capacitance and thermal-electrical analogy
title_sort top-oil temperature model for transformers based on nonlinear thermal resistance, lumped capacitance and thermal-electrical analogy
publisher Universiti Putra Malaysia Press
publishDate 2017
url http://psasir.upm.edu.my/id/eprint/55855/
http://psasir.upm.edu.my/id/eprint/55855/
http://psasir.upm.edu.my/id/eprint/55855/1/18-JTS%28S%29-0132-2016-4thProof.pdf
first_indexed 2018-09-07T18:39:55Z
last_indexed 2018-09-07T18:39:55Z
_version_ 1610975119484649472

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