Estimation of the remaining useful life of hydro generators
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Tipo de documento: | Tese |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNIFEI (RIUNIFEI) |
Texto Completo: | https://repositorio.unifei.edu.br/jspui/handle/123456789/2438 |
Resumo: | The monitoring of generators’ condition is very desirable for a reliable operation of a hydropower plant. Maintenance activities can be scheduled to avoid unexpected failures that can lead to months or years of machines stopped without generation. Studies indicate that stator insulation is the leading cause of generator failure. In this sense, the proposal methodology’s base is the monitorization of the actual health stage of the stator insulation system of hydro generators. Partial discharge tests in stator windings are applied to access the insulation condition. An algorithm to estimate the remaining useful life is the main contribution of this work. This estimation is based on both statistical evaluations of hydro generators and the stator insulation system’s actual condition. Accelerated aging tests in stator specimens with wide variables acquisition are performed to understand the aging process. The proposed algorithm is tested in simulated cases and real data from a thermal cycle test, which observed an insulation breakdown. |
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2021-02-222021-05-202021-05-20T22:26:24Z2021-05-20T22:26:24Zhttps://repositorio.unifei.edu.br/jspui/handle/123456789/2438The monitoring of generators’ condition is very desirable for a reliable operation of a hydropower plant. Maintenance activities can be scheduled to avoid unexpected failures that can lead to months or years of machines stopped without generation. Studies indicate that stator insulation is the leading cause of generator failure. In this sense, the proposal methodology’s base is the monitorization of the actual health stage of the stator insulation system of hydro generators. Partial discharge tests in stator windings are applied to access the insulation condition. An algorithm to estimate the remaining useful life is the main contribution of this work. This estimation is based on both statistical evaluations of hydro generators and the stator insulation system’s actual condition. Accelerated aging tests in stator specimens with wide variables acquisition are performed to understand the aging process. The proposed algorithm is tested in simulated cases and real data from a thermal cycle test, which observed an insulation breakdown.O monitoramento da condição dos geradores é muito desejável para uma operação confiável de uma usina hidrelétrica. As atividades de manutenção podem ser programadas para evitar falhas inesperadas que podem levar a meses ou anos de máquinas paradas sem geração. Estudos indicam que o isolamento do estator é a principal causa de falha do gerador. Nesse sentido, a base da metodologia proposta é o monitoramento do estado atual do sistema de isolamento do estator de hidrogeradores. Testes de descarga parcial nos enrolamentos do estator são aplicados para acessar a condição de isolamento. Um algoritmo para estimar a vida útil remanescente é a principal contribuição deste trabalho. Esta estimativa é baseada em avaliações estatísticas de hidro-geradores e na condição real do sistema de isolamento do estator. Testes de envelhecimento acelerado em amostras de estator com ampla aquisição de variáveis são realizados para entender o processo de envelhecimento. O algoritmo proposto é testado em casos simulados e em dados reais de um ensaio de ciclo térmico, no qual foi observado a ruptura do isolamento.Agência 1engUniversidade Federal de ItajubáPrograma de Pós-Graduação: Doutorado - Engenharia ElétricaUNIFEIBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoCNPQ::ENGENHARIAS::ENGENHARIA ELÉTRICA::SISTEMAS ELÉTRICOS DE POTÊNCIAHidrogeradoresSistema de isolamentoVida útil remanescenteEstimation of the remaining useful life of hydro generatorsinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesisBORTONI, Edson da Costahttp://lattes.cnpq.br/0936619055402651http://lattes.cnpq.br/2031198501809827BERNARDES JUNIOR, José VitorBERNARDES JUNIOR, José Vitor. Estimation of the remaining useful life of hydro generators. 2021. 159 f. Tese (Doutorado em Engenharia Elétrica) – Universidade Federal de Itajubá, Itajubá, 2021info:eu-repo/semantics/openAccessreponame:Repositório Institucional da UNIFEI (RIUNIFEI)instname:Universidade Federal de Itajubá (UNIFEI)instacron:UNIFEILICENSElicense.txtlicense.txttext/plain; charset=utf-81748https://repositorio.unifei.edu.br/jspui/bitstream/123456789/2438/2/license.txt8a4605be74aa9ea9d79846c1fba20a33MD52ORIGINALTese_2021033.pdfTese_2021033.pdfapplication/pdf6604203https://repositorio.unifei.edu.br/jspui/bitstream/123456789/2438/1/Tese_2021033.pdf1243066b5ad44cb4cbe47c6d064e6d04MD51123456789/24382021-05-20 19:26:24.115oai:repositorio.unifei.edu.br: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Repositório InstitucionalPUBhttps://repositorio.unifei.edu.br/oai/requestrepositorio@unifei.edu.br || geraldocarlos@unifei.edu.bropendoar:70442021-05-20T22:26:24Repositório Institucional da UNIFEI (RIUNIFEI) - Universidade Federal de Itajubá (UNIFEI)false |
dc.title.pt_BR.fl_str_mv |
Estimation of the remaining useful life of hydro generators |
title |
Estimation of the remaining useful life of hydro generators |
spellingShingle |
Estimation of the remaining useful life of hydro generators BERNARDES JUNIOR, José Vitor CNPQ::ENGENHARIAS::ENGENHARIA ELÉTRICA::SISTEMAS ELÉTRICOS DE POTÊNCIA Hidrogeradores Sistema de isolamento Vida útil remanescente |
title_short |
Estimation of the remaining useful life of hydro generators |
title_full |
Estimation of the remaining useful life of hydro generators |
title_fullStr |
Estimation of the remaining useful life of hydro generators |
title_full_unstemmed |
Estimation of the remaining useful life of hydro generators |
title_sort |
Estimation of the remaining useful life of hydro generators |
author |
BERNARDES JUNIOR, José Vitor |
author_facet |
BERNARDES JUNIOR, José Vitor |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
BORTONI, Edson da Costa |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/0936619055402651 |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/2031198501809827 |
dc.contributor.author.fl_str_mv |
BERNARDES JUNIOR, José Vitor |
contributor_str_mv |
BORTONI, Edson da Costa |
dc.subject.cnpq.fl_str_mv |
CNPQ::ENGENHARIAS::ENGENHARIA ELÉTRICA::SISTEMAS ELÉTRICOS DE POTÊNCIA |
topic |
CNPQ::ENGENHARIAS::ENGENHARIA ELÉTRICA::SISTEMAS ELÉTRICOS DE POTÊNCIA Hidrogeradores Sistema de isolamento Vida útil remanescente |
dc.subject.por.fl_str_mv |
Hidrogeradores Sistema de isolamento Vida útil remanescente |
description |
The monitoring of generators’ condition is very desirable for a reliable operation of a hydropower plant. Maintenance activities can be scheduled to avoid unexpected failures that can lead to months or years of machines stopped without generation. Studies indicate that stator insulation is the leading cause of generator failure. In this sense, the proposal methodology’s base is the monitorization of the actual health stage of the stator insulation system of hydro generators. Partial discharge tests in stator windings are applied to access the insulation condition. An algorithm to estimate the remaining useful life is the main contribution of this work. This estimation is based on both statistical evaluations of hydro generators and the stator insulation system’s actual condition. Accelerated aging tests in stator specimens with wide variables acquisition are performed to understand the aging process. The proposed algorithm is tested in simulated cases and real data from a thermal cycle test, which observed an insulation breakdown. |
publishDate |
2021 |
dc.date.issued.fl_str_mv |
2021-02-22 |
dc.date.available.fl_str_mv |
2021-05-20 2021-05-20T22:26:24Z |
dc.date.accessioned.fl_str_mv |
2021-05-20T22:26:24Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/doctoralThesis |
format |
doctoralThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://repositorio.unifei.edu.br/jspui/handle/123456789/2438 |
url |
https://repositorio.unifei.edu.br/jspui/handle/123456789/2438 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.references.pt_BR.fl_str_mv |
BERNARDES JUNIOR, José Vitor. Estimation of the remaining useful life of hydro generators. 2021. 159 f. Tese (Doutorado em Engenharia Elétrica) – Universidade Federal de Itajubá, Itajubá, 2021 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Universidade Federal de Itajubá |
dc.publisher.program.fl_str_mv |
Programa de Pós-Graduação: Doutorado - Engenharia Elétrica |
dc.publisher.initials.fl_str_mv |
UNIFEI |
dc.publisher.country.fl_str_mv |
Brasil |
dc.publisher.department.fl_str_mv |
IESTI - Instituto de Engenharia de Sistemas e Tecnologia da Informação |
publisher.none.fl_str_mv |
Universidade Federal de Itajubá |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UNIFEI (RIUNIFEI) instname:Universidade Federal de Itajubá (UNIFEI) instacron:UNIFEI |
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Universidade Federal de Itajubá (UNIFEI) |
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UNIFEI |
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UNIFEI |
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Repositório Institucional da UNIFEI (RIUNIFEI) |
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Repositório Institucional da UNIFEI (RIUNIFEI) |
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Repositório Institucional da UNIFEI (RIUNIFEI) - Universidade Federal de Itajubá (UNIFEI) |
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repositorio@unifei.edu.br || geraldocarlos@unifei.edu.br |
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