Metodologia baseada em simulações para determinação dos esforços eletromecânicos em transformadores de potência
Autor(a) principal: | |
---|---|
Data de Publicação: | 2020 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional Manancial UFSM |
Texto Completo: | http://repositorio.ufsm.br/handle/1/22433 |
Resumo: | The power transformers, responsible for adapt the voltage levels, are essential equipment to the operation of electrical systems. Exposed to different situation, they are subject to several failures that can lead to an operational unavailability. Among the failures, there may be the rupture of the dielectric insulation, due the windings deformations by electromechanical forces from high currents, as short-circuits, leading to technical and financial losses. This master thesis presents a methodology for electromechanical forces determination and its distribution in the windings through simulations employing Finite Element Method. After an overview of the forces, presenting operating situations of high currents and possible deformations, analytical methods of calculation are approached, exposing their simplifications and applications difficulties, with the example of the use Waters’ equations on three concentric windings arrangements: same height, tap on the end of winding and central tap. Thereby, 3D modeling and simulations of the same arrangements in finite element software are presented, showing the practicality and applicability of the simulation method. After comparing the simulations results with the equations, analyzes of the radial and axial forces are presented, with details in divisions modeled along the height of the windings and around the core column, including a parametric variation in the tap size. From the simulations, it was found that the analytical equations, even with simplifications, are accurate. Additionally, the finite element simulation tool proved to be very efficient, mainly because it allows the modeling and analysis of more complex geometries and arrangements, where the equations applications becomes limited. Still, with simulation modeling, the forces distribution was verified in detail, in addition to critical points and characteristics that can be taken into account I more reliable transformers projects. |
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2021-10-18T13:39:25Z2021-10-18T13:39:25Z2020-02-28http://repositorio.ufsm.br/handle/1/22433The power transformers, responsible for adapt the voltage levels, are essential equipment to the operation of electrical systems. Exposed to different situation, they are subject to several failures that can lead to an operational unavailability. Among the failures, there may be the rupture of the dielectric insulation, due the windings deformations by electromechanical forces from high currents, as short-circuits, leading to technical and financial losses. This master thesis presents a methodology for electromechanical forces determination and its distribution in the windings through simulations employing Finite Element Method. After an overview of the forces, presenting operating situations of high currents and possible deformations, analytical methods of calculation are approached, exposing their simplifications and applications difficulties, with the example of the use Waters’ equations on three concentric windings arrangements: same height, tap on the end of winding and central tap. Thereby, 3D modeling and simulations of the same arrangements in finite element software are presented, showing the practicality and applicability of the simulation method. After comparing the simulations results with the equations, analyzes of the radial and axial forces are presented, with details in divisions modeled along the height of the windings and around the core column, including a parametric variation in the tap size. From the simulations, it was found that the analytical equations, even with simplifications, are accurate. Additionally, the finite element simulation tool proved to be very efficient, mainly because it allows the modeling and analysis of more complex geometries and arrangements, where the equations applications becomes limited. Still, with simulation modeling, the forces distribution was verified in detail, in addition to critical points and characteristics that can be taken into account I more reliable transformers projects.Os transformadores de potência, responsáveis por adequar os níveis de tensão, são equipamentos essenciais para o funcionamento de sistemas elétricos como um todo. Expostos a diferentes situações, estão sujeitos a diversas falhas que podem acarretar em uma indisponibilidade operativa destes. Entre as falhas, pode haver o rompimento da isolação dielétrica, devido a deformações dos enrolamentos por esforços eletromecânicos oriundos de elevadas correntes, como curtos-circuitos, levando a prejuízos técnicos e financeiros. Este trabalho apresenta uma metodologia para determinação dos esforços eletromecânicos e sua distribuição nos enrolamentos de transformadores de potência através de simulações empregando o Método de Elementos Finitos. Após uma visão geral dos esforços, apresentando situações operativas de elevadas correntes e possíveis deformações, métodos analíticos de cálculo são abordados, expondo suas simplificações e dificuldades de aplicação, com a exemplificação do uso das equações de Waters sobre três arranjos de bobinas concêntricas: mesma altura, tap na cabeceira e tap central. Diante disso, são apresentadas modelagens 3D e simulações dos mesmos arranjos em software de elementos finitos, mostrando a praticidade e aplicabilidade da metodologia de simulação. Após comparar os resultados das simulações com as equações, análises dos esforços radiais e axiais são apresentadas, com detalhamento em divisões modeladas ao longo da altura dos enrolamentos e no entorno da coluna do núcleo, incluindo uma variação paramétrica do tamanho do tap. A partir das simulações, verificou-se que as equações analíticas, mesmo com simplificações, são precisas. Adicionalmente, a ferramenta de simulação em elementos finitos mostrou-se bastante eficiente, principalmente por permitir a modelagem e análise de geometrias e arranjos mais complexos, onde a aplicação de equações torna-se limitada. Ainda, com as modelagens em simulação, verificou-se detalhadamente a distribuição dos esforços, além de pontos críticos e características que podem ser levadas em conta em projetos de transformadores mais confiáveis.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPESporUniversidade Federal de Santa MariaCentro de TecnologiaPrograma de Pós-Graduação em Engenharia ElétricaUFSMBrasilEngenharia ElétricaAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessEquações de WatersEsforços eletromecânicosMétodo de elementos finitosSimulações computacionaisTransformadores de potênciaWaters equationsElectromechanical forcesFinite element methodComputational simulationsPower transformersCNPQ::ENGENHARIAS::ENGENHARIA ELETRICAMetodologia baseada em simulações para determinação dos esforços eletromecânicos em transformadores de potênciaMethodology based on simulations for electromechanical forces determination on power transformersinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisMarchesan, Tiago Bandeirahttp://lattes.cnpq.br/2318413245910780Bender, Vitor CristianoChagas, Natalia Braunhttp://lattes.cnpq.br/5106471153227367Medeiros, Leonardo Hautrive3004000000076006006006006000197cd95-ed8b-4ca0-89af-e654162d964d2fe1fd16-6bab-4e30-a1b6-eee537748ac6d15da859-355f-42b3-ad14-ed04a355242b001959b6-2ec0-42b9-a703-1c4ffed0f931reponame:Repositório Institucional Manancial UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMORIGINALDIS_PPGEE_2020_MEDEIROS_LEONARDO.pdfDIS_PPGEE_2020_MEDEIROS_LEONARDO.pdfDissertação de Mestradoapplication/pdf4793652http://repositorio.ufsm.br/bitstream/1/22433/1/DIS_PPGEE_2020_MEDEIROS_LEONARDO.pdf0633d9efb7795bfb6469c8a360e9499cMD51CC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; 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dc.title.por.fl_str_mv |
Metodologia baseada em simulações para determinação dos esforços eletromecânicos em transformadores de potência |
dc.title.alternative.eng.fl_str_mv |
Methodology based on simulations for electromechanical forces determination on power transformers |
title |
Metodologia baseada em simulações para determinação dos esforços eletromecânicos em transformadores de potência |
spellingShingle |
Metodologia baseada em simulações para determinação dos esforços eletromecânicos em transformadores de potência Medeiros, Leonardo Hautrive Equações de Waters Esforços eletromecânicos Método de elementos finitos Simulações computacionais Transformadores de potência Waters equations Electromechanical forces Finite element method Computational simulations Power transformers CNPQ::ENGENHARIAS::ENGENHARIA ELETRICA |
title_short |
Metodologia baseada em simulações para determinação dos esforços eletromecânicos em transformadores de potência |
title_full |
Metodologia baseada em simulações para determinação dos esforços eletromecânicos em transformadores de potência |
title_fullStr |
Metodologia baseada em simulações para determinação dos esforços eletromecânicos em transformadores de potência |
title_full_unstemmed |
Metodologia baseada em simulações para determinação dos esforços eletromecânicos em transformadores de potência |
title_sort |
Metodologia baseada em simulações para determinação dos esforços eletromecânicos em transformadores de potência |
author |
Medeiros, Leonardo Hautrive |
author_facet |
Medeiros, Leonardo Hautrive |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Marchesan, Tiago Bandeira |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/2318413245910780 |
dc.contributor.referee1.fl_str_mv |
Bender, Vitor Cristiano |
dc.contributor.referee2.fl_str_mv |
Chagas, Natalia Braun |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/5106471153227367 |
dc.contributor.author.fl_str_mv |
Medeiros, Leonardo Hautrive |
contributor_str_mv |
Marchesan, Tiago Bandeira Bender, Vitor Cristiano Chagas, Natalia Braun |
dc.subject.por.fl_str_mv |
Equações de Waters Esforços eletromecânicos Método de elementos finitos Simulações computacionais Transformadores de potência |
topic |
Equações de Waters Esforços eletromecânicos Método de elementos finitos Simulações computacionais Transformadores de potência Waters equations Electromechanical forces Finite element method Computational simulations Power transformers CNPQ::ENGENHARIAS::ENGENHARIA ELETRICA |
dc.subject.eng.fl_str_mv |
Waters equations Electromechanical forces Finite element method Computational simulations Power transformers |
dc.subject.cnpq.fl_str_mv |
CNPQ::ENGENHARIAS::ENGENHARIA ELETRICA |
description |
The power transformers, responsible for adapt the voltage levels, are essential equipment to the operation of electrical systems. Exposed to different situation, they are subject to several failures that can lead to an operational unavailability. Among the failures, there may be the rupture of the dielectric insulation, due the windings deformations by electromechanical forces from high currents, as short-circuits, leading to technical and financial losses. This master thesis presents a methodology for electromechanical forces determination and its distribution in the windings through simulations employing Finite Element Method. After an overview of the forces, presenting operating situations of high currents and possible deformations, analytical methods of calculation are approached, exposing their simplifications and applications difficulties, with the example of the use Waters’ equations on three concentric windings arrangements: same height, tap on the end of winding and central tap. Thereby, 3D modeling and simulations of the same arrangements in finite element software are presented, showing the practicality and applicability of the simulation method. After comparing the simulations results with the equations, analyzes of the radial and axial forces are presented, with details in divisions modeled along the height of the windings and around the core column, including a parametric variation in the tap size. From the simulations, it was found that the analytical equations, even with simplifications, are accurate. Additionally, the finite element simulation tool proved to be very efficient, mainly because it allows the modeling and analysis of more complex geometries and arrangements, where the equations applications becomes limited. Still, with simulation modeling, the forces distribution was verified in detail, in addition to critical points and characteristics that can be taken into account I more reliable transformers projects. |
publishDate |
2020 |
dc.date.issued.fl_str_mv |
2020-02-28 |
dc.date.accessioned.fl_str_mv |
2021-10-18T13:39:25Z |
dc.date.available.fl_str_mv |
2021-10-18T13:39:25Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
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publishedVersion |
dc.identifier.uri.fl_str_mv |
http://repositorio.ufsm.br/handle/1/22433 |
url |
http://repositorio.ufsm.br/handle/1/22433 |
dc.language.iso.fl_str_mv |
por |
language |
por |
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300400000007 |
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600 600 600 600 600 |
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dc.rights.driver.fl_str_mv |
Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Universidade Federal de Santa Maria Centro de Tecnologia |
dc.publisher.program.fl_str_mv |
Programa de Pós-Graduação em Engenharia Elétrica |
dc.publisher.initials.fl_str_mv |
UFSM |
dc.publisher.country.fl_str_mv |
Brasil |
dc.publisher.department.fl_str_mv |
Engenharia Elétrica |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria Centro de Tecnologia |
dc.source.none.fl_str_mv |
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