Assessment of Rogowski Coils for Measurement of Full Discharges in Power Transformers †
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , , |
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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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 |
|
_version_ |
1808129355255119872 |