Assessment of Rogowski Coils for Measurement of Full Discharges in Power Transformers †

Detalhes bibliográficos
Autor(a) principal: Riehl, Rudolf Ribeiro [UNESP]
Data de Publicação: 2021
Outros Autores: de Castro, Bruno Albuquerque [UNESP], Fraga, José Renato Castro Pompéia [UNESP], Puccia, Victor [UNESP], Lucas, Guilherme Beraldi [UNESP], Andreoli, André Luiz [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.3390/ecsa-8-11309
http://hdl.handle.net/11449/249127
Resumo: Science and industry have sought to develop systems aiming to avoid total failures in power transformers since these machines can be working under overloads, moisture, mechanical and thermal stresses, among others. These non-conformities can promote the degradation of the insulation system and lead the transformer to total failure. In the incipient stages of these faults, it is common to detect Full Discharges (FDs), which are short circuits between degraded coils. Therefore, several techniques were developed to perform FD diagnosis using UHF, acoustics, and current sensors. In this scenario, this article presents a mathematical model for Rogowski coils and compares two different types of cores: Ferrite and Teflon. For this purpose, FDs were induced in an oil-filled transformer. The sensitivity and frequency response of the Rogowski coils were compared. This analysis was achieved using the Power Spectrum Density (PSD) and the energy of the acquired signals. Additionally, the Short-Time Fourier Transform (STFT) was applied to detect repetitive discharges. The results indicated that the Ferrite core increases the sensitivity by 50 times in the frequency band between 0 and 1 MHz. However, the Teflon core showed higher sensitivity between 5 and 10 MHz.
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spelling Assessment of Rogowski Coils for Measurement of Full Discharges in Power Transformers †bushinginfrared sensorsinsulation systemsmonitoring systemspartial dischargesScience and industry have sought to develop systems aiming to avoid total failures in power transformers since these machines can be working under overloads, moisture, mechanical and thermal stresses, among others. These non-conformities can promote the degradation of the insulation system and lead the transformer to total failure. In the incipient stages of these faults, it is common to detect Full Discharges (FDs), which are short circuits between degraded coils. Therefore, several techniques were developed to perform FD diagnosis using UHF, acoustics, and current sensors. In this scenario, this article presents a mathematical model for Rogowski coils and compares two different types of cores: Ferrite and Teflon. For this purpose, FDs were induced in an oil-filled transformer. The sensitivity and frequency response of the Rogowski coils were compared. This analysis was achieved using the Power Spectrum Density (PSD) and the energy of the acquired signals. Additionally, the Short-Time Fourier Transform (STFT) was applied to detect repetitive discharges. The results indicated that the Ferrite core increases the sensitivity by 50 times in the frequency band between 0 and 1 MHz. However, the Teflon core showed higher sensitivity between 5 and 10 MHz.Department of Electrical Engineering School of Engineering São Paulo State University (UNESP), SPDepartment of Electrical Engineering School of Engineering São Paulo State University (UNESP), SPUniversidade Estadual Paulista (UNESP)Riehl, Rudolf Ribeiro [UNESP]de Castro, Bruno Albuquerque [UNESP]Fraga, José Renato Castro Pompéia [UNESP]Puccia, Victor [UNESP]Lucas, Guilherme Beraldi [UNESP]Andreoli, André Luiz [UNESP]2023-07-29T14:03:08Z2023-07-29T14:03:08Z2021-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.3390/ecsa-8-11309Engineering Proceedings, v. 10, n. 1, 2021.2673-4591http://hdl.handle.net/11449/24912710.3390/ecsa-8-113092-s2.0-85131209683Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengEngineering Proceedingsinfo:eu-repo/semantics/openAccess2024-06-28T13:34:24Zoai:repositorio.unesp.br:11449/249127Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T21:45:38.179748Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Assessment of Rogowski Coils for Measurement of Full Discharges in Power Transformers †
title Assessment of Rogowski Coils for Measurement of Full Discharges in Power Transformers †
spellingShingle Assessment of Rogowski Coils for Measurement of Full Discharges in Power Transformers †
Riehl, Rudolf Ribeiro [UNESP]
bushing
infrared sensors
insulation systems
monitoring systems
partial discharges
title_short Assessment of Rogowski Coils for Measurement of Full Discharges in Power Transformers †
title_full Assessment of Rogowski Coils for Measurement of Full Discharges in Power Transformers †
title_fullStr Assessment of Rogowski Coils for Measurement of Full Discharges in Power Transformers †
title_full_unstemmed Assessment of Rogowski Coils for Measurement of Full Discharges in Power Transformers †
title_sort Assessment of Rogowski Coils for Measurement of Full Discharges in Power Transformers †
author Riehl, Rudolf Ribeiro [UNESP]
author_facet Riehl, Rudolf Ribeiro [UNESP]
de Castro, Bruno Albuquerque [UNESP]
Fraga, José Renato Castro Pompéia [UNESP]
Puccia, Victor [UNESP]
Lucas, Guilherme Beraldi [UNESP]
Andreoli, André Luiz [UNESP]
author_role author
author2 de Castro, Bruno Albuquerque [UNESP]
Fraga, José Renato Castro Pompéia [UNESP]
Puccia, Victor [UNESP]
Lucas, Guilherme Beraldi [UNESP]
Andreoli, André Luiz [UNESP]
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (UNESP)
dc.contributor.author.fl_str_mv Riehl, Rudolf Ribeiro [UNESP]
de Castro, Bruno Albuquerque [UNESP]
Fraga, José Renato Castro Pompéia [UNESP]
Puccia, Victor [UNESP]
Lucas, Guilherme Beraldi [UNESP]
Andreoli, André Luiz [UNESP]
dc.subject.por.fl_str_mv bushing
infrared sensors
insulation systems
monitoring systems
partial discharges
topic bushing
infrared sensors
insulation systems
monitoring systems
partial discharges
description Science and industry have sought to develop systems aiming to avoid total failures in power transformers since these machines can be working under overloads, moisture, mechanical and thermal stresses, among others. These non-conformities can promote the degradation of the insulation system and lead the transformer to total failure. In the incipient stages of these faults, it is common to detect Full Discharges (FDs), which are short circuits between degraded coils. Therefore, several techniques were developed to perform FD diagnosis using UHF, acoustics, and current sensors. In this scenario, this article presents a mathematical model for Rogowski coils and compares two different types of cores: Ferrite and Teflon. For this purpose, FDs were induced in an oil-filled transformer. The sensitivity and frequency response of the Rogowski coils were compared. This analysis was achieved using the Power Spectrum Density (PSD) and the energy of the acquired signals. Additionally, the Short-Time Fourier Transform (STFT) was applied to detect repetitive discharges. The results indicated that the Ferrite core increases the sensitivity by 50 times in the frequency band between 0 and 1 MHz. However, the Teflon core showed higher sensitivity between 5 and 10 MHz.
publishDate 2021
dc.date.none.fl_str_mv 2021-01-01
2023-07-29T14:03:08Z
2023-07-29T14:03:08Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.3390/ecsa-8-11309
Engineering Proceedings, v. 10, n. 1, 2021.
2673-4591
http://hdl.handle.net/11449/249127
10.3390/ecsa-8-11309
2-s2.0-85131209683
url http://dx.doi.org/10.3390/ecsa-8-11309
http://hdl.handle.net/11449/249127
identifier_str_mv Engineering Proceedings, v. 10, n. 1, 2021.
2673-4591
10.3390/ecsa-8-11309
2-s2.0-85131209683
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Engineering Proceedings
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
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