Thermal modelling of a power transformer disc type winding immersed in mineral and ester-based oils using network models and CFD

This contribution presents the early results of a R&D collaboration established between the University of Cantabria and the Power Transformer Manufacturer EFACEC. This paper tests two different techniques of steady state thermal modelling applied to power transformer windings, Computational Flui...

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Authors: Santisteban Díaz, Agustín|||0000-0002-5053-9595, Piquero González, Alejandro, Ortiz Fernández, Félix|||0000-0001-8404-1253, Delgado San Román, Fernando|||0000-0002-2558-3033, Ortiz Fernández, Alfredo
Format: article
Publication Date:2019
Country:España
Institution:Universidad de Cantabria (UC)
Repository:UCrea Repositorio Abierto de la Universidad de Cantabria
Language:English
OAI Identifier:oai:repositorio.unican.es:10902/17743
Online Access:http://hdl.handle.net/10902/17743
Access Level:Open access
Keyword:CFD
THNM
Thermal modeling
Power transformers
Mineral oil
Ester-based liquids
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spelling Thermal modelling of a power transformer disc type winding immersed in mineral and ester-based oils using network models and CFDSantisteban Díaz, Agustín|||0000-0002-5053-9595 Piquero González, AlejandroOrtiz Fernández, Félix|||0000-0001-8404-1253 Delgado San Román, Fernando|||0000-0002-2558-3033Ortiz Fernández, AlfredoCFDTHNMThermal modelingPower transformersMineral oilEster-based liquidsThis contribution presents the early results of a R&D collaboration established between the University of Cantabria and the Power Transformer Manufacturer EFACEC. This paper tests two different techniques of steady state thermal modelling applied to power transformer windings, Computational Fluid Dynamics (CFD) and Thermal-Hydraulic Network Modelling (THNM). The state of the art of thermal modelling demonstrates that these techniques have been used to calculate both average and hotspot winding temperatures by solving the winding temperature and flows profiles within the winding. THNM models have worse accuracy than CFD in the predicted results. The improvement of these THNM models is a topic of study in transformer thermal modelling. The first goal of this paper is to test the accuracy of a new calibrated THNM model of a disc-type winding immersed in mineral oil. Then, this THNM model is tested with ester-based liquids, such as a natural ester and a synthetic ester, to determine if it can be applied to these liquids without further calibrations. Finally, the cooling performance of both type of liquids is compared using only the THNM model results. The results of this work show that the THNM model developed herein gives good estimations of temperatures compared to those obtained with CFD for both types of liquids. Also, the use of alternative fluids leads to lower temperatures when considering the same oil flow rate and temperature as inlet boundary condition.This work was supported in part by the European Union’s Horizon 2020 Research and Innovation Programme through the Marie Skłodowska-Curie Action-Research and Innovation Staff Exchange (MSCA-RISE) under Agreement 823969, and in part by the Ministry of Economy through the National Research Project: Improvement of Insulation Systems of Transformers through Dielectric Nanofluids under Grant DPI2015-71219-C21-R.Institute of Electrical and Electronics Engineers Inc.Universidad de Cantabria20192019-12-02journal articlehttp://purl.org/coar/resource_type/c_6501NAhttp://purl.org/coar/version/c_be7fb7dd8ff6fe43info:eu-repo/semantics/articlehttp://hdl.handle.net/10902/17743IEEE Access, 2019, 7, 174651-174661reponame:UCrea Repositorio Abierto de la Universidad de Cantabriainstname:Universidad de Cantabria (UC)InglésengEuropean Commission http://dx.doi.org/10.13039/501100000780 Horizon 2020 Framework Programme 823969open accesshttp://purl.org/coar/access_right/c_abf2Attribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:repositorio.unican.es:10902/177432026-06-02T12:39:31Z
dc.title.none.fl_str_mv Thermal modelling of a power transformer disc type winding immersed in mineral and ester-based oils using network models and CFD
title Thermal modelling of a power transformer disc type winding immersed in mineral and ester-based oils using network models and CFD
spellingShingle Thermal modelling of a power transformer disc type winding immersed in mineral and ester-based oils using network models and CFD
Santisteban Díaz, Agustín|||0000-0002-5053-9595
CFD
THNM
Thermal modeling
Power transformers
Mineral oil
Ester-based liquids
title_short Thermal modelling of a power transformer disc type winding immersed in mineral and ester-based oils using network models and CFD
title_full Thermal modelling of a power transformer disc type winding immersed in mineral and ester-based oils using network models and CFD
title_fullStr Thermal modelling of a power transformer disc type winding immersed in mineral and ester-based oils using network models and CFD
title_full_unstemmed Thermal modelling of a power transformer disc type winding immersed in mineral and ester-based oils using network models and CFD
title_sort Thermal modelling of a power transformer disc type winding immersed in mineral and ester-based oils using network models and CFD
dc.creator.none.fl_str_mv Santisteban Díaz, Agustín|||0000-0002-5053-9595
Piquero González, Alejandro
Ortiz Fernández, Félix|||0000-0001-8404-1253
Delgado San Román, Fernando|||0000-0002-2558-3033
Ortiz Fernández, Alfredo
author Santisteban Díaz, Agustín|||0000-0002-5053-9595
author_facet Santisteban Díaz, Agustín|||0000-0002-5053-9595
Piquero González, Alejandro
Ortiz Fernández, Félix|||0000-0001-8404-1253
Delgado San Román, Fernando|||0000-0002-2558-3033
Ortiz Fernández, Alfredo
author_role author
author2 Piquero González, Alejandro
Ortiz Fernández, Félix|||0000-0001-8404-1253
Delgado San Román, Fernando|||0000-0002-2558-3033
Ortiz Fernández, Alfredo
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Universidad de Cantabria
dc.subject.none.fl_str_mv CFD
THNM
Thermal modeling
Power transformers
Mineral oil
Ester-based liquids
topic CFD
THNM
Thermal modeling
Power transformers
Mineral oil
Ester-based liquids
description This contribution presents the early results of a R&D collaboration established between the University of Cantabria and the Power Transformer Manufacturer EFACEC. This paper tests two different techniques of steady state thermal modelling applied to power transformer windings, Computational Fluid Dynamics (CFD) and Thermal-Hydraulic Network Modelling (THNM). The state of the art of thermal modelling demonstrates that these techniques have been used to calculate both average and hotspot winding temperatures by solving the winding temperature and flows profiles within the winding. THNM models have worse accuracy than CFD in the predicted results. The improvement of these THNM models is a topic of study in transformer thermal modelling. The first goal of this paper is to test the accuracy of a new calibrated THNM model of a disc-type winding immersed in mineral oil. Then, this THNM model is tested with ester-based liquids, such as a natural ester and a synthetic ester, to determine if it can be applied to these liquids without further calibrations. Finally, the cooling performance of both type of liquids is compared using only the THNM model results. The results of this work show that the THNM model developed herein gives good estimations of temperatures compared to those obtained with CFD for both types of liquids. Also, the use of alternative fluids leads to lower temperatures when considering the same oil flow rate and temperature as inlet boundary condition.
publishDate 2019
dc.date.none.fl_str_mv 2019
2019-12-02
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
NA
http://purl.org/coar/version/c_be7fb7dd8ff6fe43
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10902/17743
url http://hdl.handle.net/10902/17743
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv European Commission http://dx.doi.org/10.13039/501100000780 Horizon 2020 Framework Programme 823969
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Institute of Electrical and Electronics Engineers Inc.
publisher.none.fl_str_mv Institute of Electrical and Electronics Engineers Inc.
dc.source.none.fl_str_mv IEEE Access, 2019, 7, 174651-174661
reponame:UCrea Repositorio Abierto de la Universidad de Cantabria
instname:Universidad de Cantabria (UC)
instname_str Universidad de Cantabria (UC)
reponame_str UCrea Repositorio Abierto de la Universidad de Cantabria
collection UCrea Repositorio Abierto de la Universidad de Cantabria
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869411662976516096
score 15,301603

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