Saturation curve estimation of three-legged three-phase transformers using inrush current waveforms

This paper proposes an innovative methodology to estimate the saturation curve of three-phase three-legged transformers, including deep saturation. Unlike other methodologies, the proposal only requires terminal measurements (only one three-phase inrush test and only one three-phase no-load test) wi...

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Autores: Martínez Figueroa, Gerardo de Jesús, Córcoles López, Felipe|||0000-0002-9279-069X, Bogarra Rodríguez, Santiago|||0000-0002-2006-1156
Tipo de recurso: artículo
Fecha de publicación:2023
País:España
Institución:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/439138
Acceso en línea:https://hdl.handle.net/2117/439138
https://dx.doi.org/10.1109/TPWRD.2023.3334102
Access Level:acceso abierto
Palabra clave:Air-core inductance
Inrush current
Parameters estimation
Residual flux
Saturation curve
Three-phase three-legged transformer
Transformer modeling
Àrees temàtiques de la UPC::Enginyeria elèctrica
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spelling Saturation curve estimation of three-legged three-phase transformers using inrush current waveformsMartínez Figueroa, Gerardo de JesúsCórcoles López, Felipe|||0000-0002-9279-069XBogarra Rodríguez, Santiago|||0000-0002-2006-1156Air-core inductanceInrush currentParameters estimationResidual fluxSaturation curveThree-phase three-legged transformerTransformer modelingÀrees temàtiques de la UPC::Enginyeria elèctricaThis paper proposes an innovative methodology to estimate the saturation curve of three-phase three-legged transformers, including deep saturation. Unlike other methodologies, the proposal only requires terminal measurements (only one three-phase inrush test and only one three-phase no-load test) without breaking the winding connections and without knowledge of the residual flux. No special tests with specific winding connections are necessary. This feature allows the methodology to be applied to any power transformer installed on the grid or in industrial facilities, not just limited to laboratory transformers. The estimation of the parameters related to deep saturation is based on the instantaneous reactive power during the inrush transient. The instantaneous reactive power shares common characteristics among all possible inrush transients at a given transformer, making it usable as a kind of signature. The proposed methodology differs from the literature ones in the no need to know the residual flux or the energization point-on-wave corresponding to the inrush test; therefore, inrush tests can be conducted without controlled switching. The methodology is validated through multiple laboratory measurements, demonstrating its effectiveness by showing close agreement between measured and estimated inrush currents and no-load hysteresis loops on a small transformer, as well as between measured and calculated inrush currents during the energization of a 7.5 MVA distribution transformer.Peer ReviewedInstitute of Electrical and Electronics Engineers (IEEE)20232023-11-1720252025-07-22journal articlehttp://purl.org/coar/resource_type/c_6501AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/439138https://dx.doi.org/10.1109/TPWRD.2023.3334102reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/4391382026-05-27T15:37:01Z
dc.title.none.fl_str_mv Saturation curve estimation of three-legged three-phase transformers using inrush current waveforms
title Saturation curve estimation of three-legged three-phase transformers using inrush current waveforms
spellingShingle Saturation curve estimation of three-legged three-phase transformers using inrush current waveforms
Martínez Figueroa, Gerardo de Jesús
Air-core inductance
Inrush current
Parameters estimation
Residual flux
Saturation curve
Three-phase three-legged transformer
Transformer modeling
Àrees temàtiques de la UPC::Enginyeria elèctrica
title_short Saturation curve estimation of three-legged three-phase transformers using inrush current waveforms
title_full Saturation curve estimation of three-legged three-phase transformers using inrush current waveforms
title_fullStr Saturation curve estimation of three-legged three-phase transformers using inrush current waveforms
title_full_unstemmed Saturation curve estimation of three-legged three-phase transformers using inrush current waveforms
title_sort Saturation curve estimation of three-legged three-phase transformers using inrush current waveforms
dc.creator.none.fl_str_mv Martínez Figueroa, Gerardo de Jesús
Córcoles López, Felipe|||0000-0002-9279-069X
Bogarra Rodríguez, Santiago|||0000-0002-2006-1156
author Martínez Figueroa, Gerardo de Jesús
author_facet Martínez Figueroa, Gerardo de Jesús
Córcoles López, Felipe|||0000-0002-9279-069X
Bogarra Rodríguez, Santiago|||0000-0002-2006-1156
author_role author
author2 Córcoles López, Felipe|||0000-0002-9279-069X
Bogarra Rodríguez, Santiago|||0000-0002-2006-1156
author2_role author
author
dc.subject.none.fl_str_mv Air-core inductance
Inrush current
Parameters estimation
Residual flux
Saturation curve
Three-phase three-legged transformer
Transformer modeling
Àrees temàtiques de la UPC::Enginyeria elèctrica
topic Air-core inductance
Inrush current
Parameters estimation
Residual flux
Saturation curve
Three-phase three-legged transformer
Transformer modeling
Àrees temàtiques de la UPC::Enginyeria elèctrica
description This paper proposes an innovative methodology to estimate the saturation curve of three-phase three-legged transformers, including deep saturation. Unlike other methodologies, the proposal only requires terminal measurements (only one three-phase inrush test and only one three-phase no-load test) without breaking the winding connections and without knowledge of the residual flux. No special tests with specific winding connections are necessary. This feature allows the methodology to be applied to any power transformer installed on the grid or in industrial facilities, not just limited to laboratory transformers. The estimation of the parameters related to deep saturation is based on the instantaneous reactive power during the inrush transient. The instantaneous reactive power shares common characteristics among all possible inrush transients at a given transformer, making it usable as a kind of signature. The proposed methodology differs from the literature ones in the no need to know the residual flux or the energization point-on-wave corresponding to the inrush test; therefore, inrush tests can be conducted without controlled switching. The methodology is validated through multiple laboratory measurements, demonstrating its effectiveness by showing close agreement between measured and estimated inrush currents and no-load hysteresis loops on a small transformer, as well as between measured and calculated inrush currents during the energization of a 7.5 MVA distribution transformer.
publishDate 2023
dc.date.none.fl_str_mv 2023
2023-11-17
2025
2025-07-22
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
AM
http://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/439138
https://dx.doi.org/10.1109/TPWRD.2023.3334102
url https://hdl.handle.net/2117/439138
https://dx.doi.org/10.1109/TPWRD.2023.3334102
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
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
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Institute of Electrical and Electronics Engineers (IEEE)
publisher.none.fl_str_mv Institute of Electrical and Electronics Engineers (IEEE)
dc.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
collection UPCommons. Portal del coneixement obert de la UPC
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869409021133324288
score 15,812455

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