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...

Full description

Bibliographic Details
Main Author: Mohd Zulhimi Bin Zolkefali
Other Authors: Roslan, M.H.
Format: Journal
Published: Pertanika Journal of Science & Technology, Universiti Putra Malaysia 2017
Subjects:
Biological sciences
Online Access:http://www.myjurnal.my/public/article-view.php?id=113327
id oai:www.myjurnal.my:113327
recordtype eprints
spelling oai:www.myjurnal.my:1133272018-09-20T00:00:00Z Top-oil temperature model for transformers based on nonlinear thermal resistance, lumped capacitance and thermal-electrical analogy Mohd Zulhimi Bin Zolkefali Biological sciences 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. Pertanika Journal of Science & Technology, Universiti Putra Malaysia Roslan, M.H. 2017-00-00 Journal application/pdf 113327 www.myjurnal.my/filebank/published_article/6221710.pdf www.myjurnal.my/public/article-view.php?id=113327
repository_type Digital Repository
institution_category Local Institution
institution MyJournal
building MyJournal Repository
collection Online Access
topic Biological sciences
spellingShingle Biological sciences
Mohd Zulhimi Bin Zolkefali
Top-oil temperature model for transformers based on nonlinear thermal resistance, lumped capacitance and thermal-electrical analogy
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.
author2 Roslan, M.H.
author_facet Roslan, M.H.
Mohd Zulhimi Bin Zolkefali
format Journal
author Mohd Zulhimi Bin Zolkefali
author_sort Mohd Zulhimi Bin Zolkefali
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 Pertanika Journal of Science & Technology, Universiti Putra Malaysia
publishDate 2017
url http://www.myjurnal.my/public/article-view.php?id=113327
first_indexed 2018-09-20T16:17:18Z
last_indexed 2018-09-20T16:17:18Z
_version_ 1612251119384264704

Similar Items