Raising knowledge and developing technology for the design and deployment of high-performance power transformers immersed in biodegradable fluids “BIOTRAFO”

Effect of maghemite nanoparticles on insulation and cooling behaviour of a natural ester used in power transformers

Author(s): Cristian Olmo, Inmaculada Fernandez, Agustin Santisteban, Cristina Mendez, Felix Ortiz, Alfredo Ortiz
Published in: 2019 IEEE 20th International Conference on Dielectric Liquids (ICDL), 2019, Page(s) 1-4, ISBN 978-1-7281-1718-8
Publisher: IEEE
DOI: 10.1109/icdl.2019.8796817

Transient Thermal Condition of Natural Oil-cooled Disc-type Winding

Author(s): Saeed Khandan Siar, Stefan Tenbohlen
Published in: IEEE International Conference on Dielectric Liquids (ICDL), 2019, ISBN 978-1-7281-1718-8
Publisher: IEEE
DOI: 10.1109/icdl.2019.8796572

Impact of Thermal Aging on The Conductivity of Kraft Paper Impregnated with Mineral Oil and Synthetic Ester

Author(s): Abdelrahman M. Alshehawy; Shanika Matharage; Zhongdong Wang; Motoo Tsuchie; Masahiro Kozako; Masayuki Hikita
Published in: IEEE 22nd International Conference on Dielectric Liquids (ICDL), 2023, ISBN 979-8-3503-0217-2
Publisher: IEEE
DOI: 10.1109/icdl59152.2023.10209322

Thermal Performance Study of Power Transformer Filled with Biodegradable Oil Using the Effective Approach for Electromagnetic and Computational Fluid Dynamics Models Multiple Coupling

Author(s): Michal Stebel, Andrzej J. Nowak, Bartlomiej Melka, Michal Palacz, Michal Haida, Jakub Bodys, Jacek Smolka, Krzysztof Kubiczek, Pawel Lasek, Mariusz Stepien, Gustavo Rios Rodriguez, Luciano Garelli, Mario Storti, Francisco Pessolani, Mauro Amadei, Daniel Granata
Published in: IEEE 21st International Conference on Dielectric Liquids (ICDL), 2021
Publisher: ABMEC-IACM
DOI: 10.1109/icdl49583.2022.9830957

Study of the Thermal Degradation of Different Insulating Papers Impregnated with a Natural Ester

Author(s): Cristina Méndez Gutiérrez, Cristian Olmo Salas, Carlos Javier Renedo Estébanez, Masahiro Kozako, Masayuki Hikita, Alfredo Ortiz Fernández
Published in: International Conference on Condition Monitoring and Diagnosis (CMD), 2023
Publisher: IEEE
DOI: 10.23919/cmd54214.2022.9991628

100MVA Non-Uniform Heat Losses Study

Author(s): Ramazan Altay, Pedro Jose Quintanilla, Alfredo Ortiz, Fernando Delgado, Ahmet Kerem Koseoglu
Published in: 9th International Conference on Condition Monitoring and Diagnosis (CMD), 2022, ISBN 978-4-88686-431-4
Publisher: IEEE
DOI: 10.23919/cmd54214.2022.9991711

Application of biodegradable fluids as liquid insulation for distribution and power transformers

Author(s): Belen Garcia, Alfredo Ortiz, Carlos Renedo, Juan Carlos Burgos, Diego Garcia Gomez, Daniel Perez Rosa
Published in: 2020 IEEE International Conference on Environment and Electrical Engineering and 2020 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe), 2020, Page(s) 1-6, ISBN 978-1-7281-7455-6
Publisher: IEEE
DOI: 10.1109/eeeic/icpseurope49358.2020.9160569

Coupled electromagnetic and thermal models of the 315 kVA distribution transformer for mineral and biodegradable oils in different climate conditions

Author(s): Bartłomiej Melka, Michał Palacz, Michał Stebel, Jakub Bodys, Michał Haida, Luciano Garelli, Gustavo Rios, Mario Storti, Krzysztof Kubiczek, Pawel Lasek, Mariusz Stepien, Francisco Pessolani, Mauro Amadei, Daniel Granata, Jacek Smołka.
Published in: International Conference on Contemporary Problems of Thermal Engineering (CPOTE 2020), 2020
Publisher: IEEE

Thermal Modeling of a Power Transformer with Different Dielectric Liquids

Author(s): Agustín Santisteban, Félix Ortiz , Carlos J. Renedo, Severiano Perez, Cristina Méndez and Cristina Fernández-Diego.
Published in: Proceedings XI National and II International Engineering Thermodynamics Congress (11-CNIT), 2019
Publisher: UCLM

Effect of Moisture Content on Temperature Characteristics of Dielectric Breakdown Strength of Biodegradable Ester Oils

Author(s): Takahiro Okamoto, Daigo Okumura, Kyouhei Hamasuna, Motoo Tsuchie, Masahiro Kozako Masayuki Hikita, Mrutyunjay Maharana, Cristian Olmo Salas
Published in: 2023, ISBN 979-8-3503-0217-2
Publisher: IEEE
DOI: 10.1109/icdl59152.2023.10209351

Coupled CFD and electromagnetic analysis of an ONAN distribution transformer cooled with mineral oil and biodegradable esters

Author(s): Luciano Garelli, Gustavo Rios, Mario Storti, Francisco Pessolani, Mauro Amadei, Pawel Lasek, Krzysztof Kubiczek, Mariusz Stepien, Michał Stebel, Bartłomiej Melka, Jakub Bodys, Michał Haida, Michał Palacz, Jacek Smołka.
Published in: International Conference on Dielectrics (ICD 2020), 2020, Page(s) 766-769, ISBN 978-1-7281-8983-3
Publisher: IEEE
DOI: 10.1109/icd46958.2020.9341955

Comparison of the Effect of Thermal Aging on Dielectric Properties of Vegetable Oils and Impregnated Kraft Paper

Author(s): Cristina Méndez, Hikaru Araki, Taichi Yamada, Motoo Tsuchie, Masahiro Kozako, Masayuki Hikita, Alfredo Ortiz.
Published in: International Conference on Dielectrics (ICD 2020), 2020, Page(s) 732-735, ISBN 978-1-7281-8983-3
Publisher: IEEE
DOI: 10.1109/icd46958.2020.9341997

Influence of Water Contents on Ester Liquids Partial Discharge Inception Voltage

Author(s): L. Calcara; Alan Sbravati; Kevin Rapp; Massimo Pompili
Published in: 2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP), 2021, Page(s) 235-238, ISBN 978-1-7281-9572-8
Publisher: IEEE
DOI: 10.1109/ceidp49254.2020.9437441

CFD study of the impact of the deviation on the mass flow inlet on winding hot-spot temperature of a power transformer using mineral and ester oils

Author(s): A. Santisteban; F. Ortiz; A.K. Koseoglu; R. Altay; C.J. Renedo; A. Ortiz
Published in: IEEE 21st International Conference on Dielectric Liquids (ICDL), Issue 2, 2022, Page(s) 228-231
Publisher: IEEE
DOI: 10.1109/icdl49583.2022.9830976

A comparative study on the dielectric properties of mineral oils and natural esters

Author(s): Andrés Montero, Diego García, Belén García, Juan Carlos Burgos
Published in: IEEE International Conference on Environment and Electrical Engineering and 2023 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe), 2023, ISBN 979-8-3503-4743-2
Publisher: IEEE
DOI: 10.1109/eeeic/icpseurope57605.2023.10194693

CFD analyses of a test platform with different fluids for use in transformers.

Author(s): Pedro J. Quintanilla, Ramazan Altay, Agustín Santisteban, Alfredo Ortiz, Ahmet K. Koseoglu
Published in: 7th International Advanced Research Workshop on Transformers (ARWtr), 2022, ISBN 978-84-09-45157-9
Publisher: IEEE
DOI: 10.23919/arwtr54586.2022.9959953

Impregnation processes of insulation rigid components of cellulose in synthetic ester and mineral oil

Author(s): Alfredo Ortiz, Jaime Sanz, Severiano Perez, Cristina Fernandez-Diego, Ernesto Ivan Diestre, Ismael Vela
Published in: 2019 IEEE 20th International Conference on Dielectric Liquids (ICDL), 2019, Page(s) 1-4, ISBN 978-1-7281-1718-8
Publisher: IEEE
DOI: 10.1109/icdl.2019.8796739

Cooling Performance Of Different Dielectric Fluids Containing Nanoparticles in a Transformer Winding

Author(s): Agustin Santisteban, Cristian Olmo, Cristina Mendez, Fernando Delgado, Carlos J. Renedo, Felix Ortiz
Published in: 2019 IEEE 20th International Conference on Dielectric Liquids (ICDL), 2019, Page(s) 1-4, ISBN 978-1-7281-1718-8
Publisher: IEEE
DOI: 10.1109/icdl.2019.8796516

Numerical and experimental evaluation of dielectric properties of thermally aged insulating paper used in power transformers

Author(s): Mónica Díaz, Cristina Méndez, M. Díaz, Cristian Olmo, Carlos Vila and Fernando Delgado
Published in: International Conference on Dielectrics, 2022, Page(s) 809-812
Publisher: IEEE
DOI: 10.1109/icd53806.2022.9863446

Dielectric and Mechanical Assessment of Kraft and Diamond Dotted Paper Aged with Commercial Vegetable Oil

Author(s): Jordà Franquet, Inmaculada Fernández, Alfredo Ortiz
Published in: International Conference on Dielectrics (ICD 2020), 2020, Page(s) 696-699, ISBN 978-1-7281-8983-3
Publisher: IEEE
DOI: 10.1109/icd46958.2020.9341857

Application of Multiscale Calculation of Heat Transfer in Electric Transformer Winding Channels

Author(s): Mario A. Storti, Jonathan Dorella, Luciano Garelli, and Gustavo A. Ríos Rodríguez.
Published in: Proceedings of ENIEF 2019, 2019
Publisher: Asociación argentina de mecánica computacional

Numerical Investigation on the Influence of Clack-bands on Lifetime of Disc-type Windings

Author(s): Saeed Khandan Siar, Stefan Tenbohlen.
Published in: International Conference on Dielectrics (ICD 2020), 2020, Page(s) 700-703, ISBN 978-1-7281-8983-3
Publisher: IEEE
DOI: 10.1109/icd46958.2020.9342026

Ageing of Crepe Paper in Mineral Oil and Natural Ester

Author(s): Cristina Fernández-Diego, Alfredo Ortiz, Inmaculada Fernández, Carlos J. Renedo, Fernando Delgado.
Published in: International Symposium on Electrical Insulating Materials (ISEIM 2020), 2020, Page(s) 217-220, ISBN 9784886864185
Publisher: IEEE

Investigation of Operational and Design Parameters Affecting the Thermal Behaviour of Disc-Type Winding.

Author(s): Saeed Khandan Siar, Stefan Tenbohlen
Published in: Conference: International Symposium on High Voltage Engineering _ ISH, 2019, ISBN 978-3-030-31679-2
Publisher: Springer, Cham
DOI: 10.1007/978-3-030-31680-8_25

Investigation of the Degradation of a Wood Pulp-Cotton Presspaper in Different Biodegradable Oils

Author(s): Cristina Mendez Gutierrez; Jaime Sanz Asensio; Cristian Olmo Salas; Fernando Delgado; Pedro Quintanilla Cavia; Riccardo Maina; Alfredo Ortiz Fernandez
Published in: IEEE 21st International Conference on Dielectric Liquids (ICDL), Sevilla, 2022, 232-235, Issue 1, 2022, Page(s) 232-235
Publisher: IEEE
DOI: 10.1109/icdl49583.2022.9830979

A statistical analysis of predictive maintenance tests on synthetic ester-filled railway transformers

Author(s): Elmer Sorrentino, Belén García, Domingo Urquiza, Diego F. García Gómez
Published in: International Conference on Environment and Electrical Engineering and 2023 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe), 2022, ISBN 979-8-3503-4743-2
Publisher: IEEE
DOI: 10.1109/eeeic/icpseurope57605.2023.10194760

Kraft And Diamond Dotted Paper Thermally Aged In Mineral Oil And Natural Ester: Mechanical Characterisation

Author(s): Cristina Fernandez-Diego, Alfredo Ortiz, Isidro A. Carrascal, Inmaculada Fernandez, Fernando Delgado, Cristian Olmo
Published in: 2019 IEEE 20th International Conference on Dielectric Liquids (ICDL), 2019, Page(s) 1-4, ISBN 978-1-7281-1718-8
Publisher: IEEE
DOI: 10.1109/ICDL.2019.8796691

Analysis of Thermal-Electrical Modelling of a Distribution Transformer using Ansys and Code_Saturne

Author(s): Luciano Garelli, Gustavo A. Ríos Rodríguez, Paweł Lasek, Krzysztof Kubiczek, Mariusz Stepien and Mario A. Storti.
Published in: Proceedings of ENIEF 2019, 2019
Publisher: Asociación argentina de mecánica computacional

Adaptation of the impregnation conditions of cellulosic transformer solids to the use of natural esters

Author(s): Sandra Tresgallo, Jaime Sanz Asensio, Cristian Olmo Salas, Cristina Méndez Gutiérrez, Pedro J. Quintanilla Cavia, Diego F. García, Carlos Vila
Published in: International Conference on Dielectrics (ICD), 2022, Page(s) 397-400
Publisher: IEEE
DOI: 10.1109/icd53806.2022.9863477

Analysis of the Impregnation Process of Cellulosic Materials by Ester-Based Insulating Liquids

Author(s): Oasis Sancibrian, Carlos Vila, Inmaculada Fernandez, Cristian Olmo, Alfredo Ortiz
Published in: 2019 6th International Advanced Research Workshop on Transformers (ARWtr), 2019, Page(s) 59-63, ISBN 978-84-09-11743-7
Publisher: IEEE
DOI: 10.23919/arwtr.2019.8930182

Investigation of saturation moisture in the PD behavior in the biodegradable ester oil

Author(s): Mrutyunjay Maharana, Kyouhei Hamasuna, Masahiro Kozako, Masayuki Hikita, Motoo Tsuchie, Kai Wu
Published in: International Conference on Condition Monitoring and Diagnosis (CMD), 2023, ISBN 978-4-88686-431-4
Publisher: IEEE
DOI: 10.23919/cmd54214.2022.9991312

Performance analysis of natural, synthetic and mineral oil in a 100 MVA power transformer

Author(s): R. Altay, A. Santisteban, C. Olmo, F. Delgado, Carlos J. Renedo, A.Kerem Köseoğlu, A. Ortiz.
Published in: International Conference on Dielectrics (ICD 2020, 2020, Page(s) 770-773, ISBN 978-1-7281-8983-3
Publisher: IEEE
DOI: 10.1109/icd46958.2020.9341919

Effect of the Thermal Characteristics of Dielectric Fluids on the Loading Capacity of a Power Transformer

Author(s): D. Matia; A. Santisteban; F. Ortiz; P.J. Quintanilla; D.F. Garcia; A. Ortiz
Published in: IEEE 21st International Conference on Dielectric Liquids (ICDL), Sevilla, 2022, 244-247, Issue 2, 2022, Page(s) 1-4
Publisher: IEEE
DOI: 10.1109/icdl49583.2022.9830933

Experimental Study on the Insulation Permittivity of Transformers Retrofilled with Natural Esters

Author(s): Andrés Montero, Belén García de Burgos, Juan D. Mina-Casaran, Juan C. Burgos
Published in: Proceedings of the International Conference on Dielectric Liquids (ICDL, 2022, Page(s) 1-4
Publisher: IEEE
DOI: 10.1109/icdl49583.2022.9830963

Determination of Heat Generation in Power Transformers by Electromagnetic Harmonic FEM Analysis

Author(s): Pawel Lasek, Krzysztof Kubiczek, Luciano Garelli, Gustavo A. Ríos Rodríguez, Mariusz Stepien and Mario A. Storti.
Published in: Proceedings of ENIEF 2019, 2019
Publisher: Asociación argentina de mecánica computacional

Thermal analysis of a low voltage winding of a power transformer working with natural ester and mineral oil

Author(s): Agustín Santisteban, Jonathan Dorella, Luciano Garelli, Mario Storti, Fernando Delgado, Alfredo Ortiz.
Published in: International Conference on Contemporary Problems of Thermal Engineering (CPOTE 2020), 2020
Publisher: IEEE

Measurement and analysis of power losses in sintered cores for power electronic devices in renewable energy systems

Author(s): Pawel Lasek, Mariusz Stepien.
Published in: International Conference on Contemporary Problems of Thermal Engineering (CPOTE 2020), 2020
Publisher: IEEE

Effect of Magnetic and Non-magnetic Nanoparticles on Insulation and Cooling Behaviour of a Natural Ester for Power Transformers

Author(s): Cristina Méndez, Inmaculada Fernández, Alfredo Ortiz, Félix Ortiz, Cristian Olmo, Agustín Santisteban, Fernando Delgado, Carlos J. Renedo.
Published in: International Symposium on Electrical Insulating Materials (ISEIM 2020), 2020
Publisher: IEEE

Numerical study of 8.5 MVA disk-type power transformer cooled by biodegradable esters using coupled CFD-CFD and CFD-EMAG modelling

Author(s): Michał Stebel, Michał Palacz, Bartłomiej Melka, Jakub Bodys, Luciano Garelli, Gustavo Rios, Krzysztof Kubiczek, Pawel Lasek, Mariusz Stepien, Michał Haida, Francisco Pessolani, Mauro Amadei, Daniel Granata, Mario Storti, Jacek Smołka.
Published in: International Conference on Contemporary Problems of Thermal Engineering (CPOTE 2020), 2020
Publisher: IEEE

Maghemite Nanofluid Based on Natural Ester: Cooling and Insulation Properties Assessment

Author(s): Cristian Olmo, Cristina Mendez, Felix Ortiz, Fernando Delgado, Rafael Valiente, Peter Werle
Published in: IEEE Access, Issue 7, 2019, Page(s) 145851-145860, ISSN 2169-3536
Publisher: Institute of Electrical and Electronics Engineers Inc.
DOI: 10.1109/access.2019.2945547

Effective Cooling of a Distribution Transformer Using Biodegradable Oils at Different Climate Conditions

Author(s): Bartlomiej Melka; Michal Stebel; Jakub Bodys; Krzysztof Kubiczek; Pawel Lasek; Gustavo Rios Rodriguez; Luciano Garelli; Michal Haida; Michal Palacz; Andrzej J. Nowak; Francisco Pessolani; Mauro Amadei; Mario Storti; Mariusz Stepien; Jacek Smolka
Published in: IEEE Transactions on Dielectrics and Electrical Insulation, Issue 30, 2023, Page(s) 1557-1565, ISSN 1070-9878
Publisher: Institute of Electrical and Electronics Engineers
DOI: 10.1109/tdei.2023.3282561

Use Performance and Management of Biodegradable Fluids as Transformer Insulation

Author(s): Belen Garcia; Alfredo Ortiz; Carlos J. Renedo; Diego F. García; Andrés Montero
Published in: Energies, Issue 14, 2021, ISSN 1996-1073
Publisher: Multidisciplinary Digital Publishing Institute (MDPI)
DOI: 10.3390/en14196357

Thermal Modelling of a Power Transformer Disc Type Winding Immersed in Mineral and Ester-Based Oils Using Network Models and CFD

Author(s): Agustin Santisteban, Alejandro Piquero, Felix Ortiz, Fernando Delgado, Alfredo Ortiz
Published in: IEEE Access, Issue 7, 2019, Page(s) 174651-174661, ISSN 2169-3536
Publisher: Institute of Electrical and Electronics Engineers Inc.
DOI: 10.1109/access.2019.2957171

Dielectric design of ester-filled power transformers: AC stress analysis

Author(s): Andres Montero Romero; Belen Garcia; Juan Carlos Burgos; Carlos Gonzalez-Garcia
Published in: IEEE Transactions on Power Delivery, Issue 1, 2022, Page(s) 2403-2412, ISSN 0885-8977
Publisher: Institute of Electrical and Electronics Engineers
DOI: 10.1109/tpwrd.2022.3145880

Electric field distribution in natural-ester retrofilled transformers under AC stress

Author(s): Andrés Montero; Belén García; Juan Carlos Burgos
Published in: International Journal of Electrical Power & Energy Systems, Issue 155, 2024, ISSN 0142-0615
Publisher: Elsevier BV
DOI: 10.1016/j.ijepes.2023.109549

Impact of the Use of Vegetable Oil on the Mechanical Failure of the Cellulosic Insulation of Continuously Transposed Conductors in Power Transformers

Author(s): Carmela Oria, Cristina Méndez, Isidro Carrascal, Alfredo Ortiz and Diego Ferreño
Published in: Transactions on Dielectrics and Electrical Insulation, Issue 29, 2022, Page(s) 607-613, ISSN 1070-9878
Publisher: Institute of Electrical and Electronics Engineers
DOI: 10.1109/tdei.2022.3157936

Measurement and Analysis of Power Losses in Sintered Cores for Power Electronic Devices in Renewable Energy Systems

Author(s): Pawel Lasek, Mariusz Stepien
Published in: Journal of Energy Resources Technology, Transactions of the ASME, Issue 144, 2022, ISSN 0195-0738
Publisher: ASME
DOI: 10.1115/1.4052791

Titania Nanofluids Based on Natural Ester: Cooling and Insulation Properties Assessment

Author(s): Cristian Olmo, Cristina Méndez, Félix Ortiz, Fernando Delgado, Alfredo Ortiz
Published in: Nanomaterials, Issue 10/4, 2020, Page(s) 603, ISSN 2079-4991
Publisher: MDPI
DOI: 10.3390/nano10040603

Thermal analysis of 8.5 MVA disk-type power transformer cooled by biodegradable ester oil working in ONAN mode by using advanced EMAG–CFD–CFD coupling

Author(s): Michal Stebel, Krzysztof Kubiczek, Gustavo Adolfo Rios Rodriguez, Michal Palacz, Luciano Garelli, Bartlomiej Melka, Michal Haida, Jakub Bodys, Andrzej J. Nowak, Pawel Lasek, Mariusz Stepien, Francisco Pessolani, Mauro Amadei, Daniel Granata, Mario Alberto Storti, Jacek Smolka
Published in: International Journal of Electrical Power and Energy Systems, Issue 136, 2022, Page(s) 1-19, ISSN 0142-0615
Publisher: Elsevier BV
DOI: 10.1016/j.ijepes.2021.107737

A New Method for the Quantification of the Remaining Mineral Oil in Natural-Ester Retrofilled Transformers

Author(s): Andrés Montero, Belén García, Juan Carlos Cabanelas
Published in: Electrical Insulation Magazine, Issue 39, 2023, Page(s) 17-25, ISSN 0883-7554
Publisher: Institute of Electrical and Electronics Engineers
DOI: 10.1109/mei.2023.10220244

Power transformer temperature–moisture dynamics modeling: an experimental validation

Author(s): W. Correa, D.F. García, B. García de Burgos
Published in: Electrical Engineering, 2022, ISSN 0948-7921
Publisher: Springer Verlag
DOI: 10.1007/s00202-022-01696-0

Thermo-magnetic-fluid dynamics analysis of an ONAN distribution transformer cooled with mineral oil and biodegradable esters

Author(s): L.Garelli G.A.Ríos Rodriguez K.Kubiczek P.Lasek M.Stepien J.Smolka M.Storti F.Pessolani M.Amadei
Published in: Thermal Science and Engineering Progress, Issue 23, 2021, ISSN 2451-9049
Publisher: Elsevier BV
DOI: 10.1016/j.tsep.2021.100861

Kinetic assessment of mechanical properties of a cellulose board aged in mineral oil and synthetic ester

Author(s): Cristina Fernández-Diego,Alfredo Ortiz, Isidro A. Carrascal, Inmaculada Fernández, Carlos J. Renedo
Published in: Polymers, Issue 13, 2021, Page(s) 4150, ISSN 2073-4360
Publisher: MDPI
DOI: 10.3390/polym13234150

Use of Alternative Fluids in Very High-Power Transformers: Experimental and Numerical Thermal Studies

Author(s): Ramazan Altay; Agustín Santisteban; Cristian Olmo; Carlos J. Renedo; Alfredo Ortiz Fernández; Felix Ortiz; Fernando Delgado
Published in: IEEE Access, Issue 8, 2020, Page(s) 207054 - 207062, ISSN 2169-3536
Publisher: Institute of Electrical and Electronics Engineers Inc.
DOI: 10.1109/access.2020.3037672

Understanding the Ageing Performance of Alternative Dielectric Fluids

Author(s): Cristina Mendez Gutierrez; Alfredo Ortiz Fernandez; Carlos Javier Renedo Estebanez; Cristian Olmo Salas; Riccardo Maina
Published in: IEEE Access, Issue 11, 2023, Page(s) 9656 - 9671, ISSN 2169-3536
Publisher: Institute of Electrical and Electronics Engineers Inc.
DOI: 10.1109/access.2023.3239895

A Brief Review of the Impregnation Process with Dielectric Fluids of Cellulosic Materials Used in Electric Power Transformers

Author(s): Jaime Sanz, Carlos J. Renedo, Alfredo Ortiz, Pedro J. Quintanilla, Félix Ortiz, Diego F. García
Published in: Energies, Issue 16, 2023, Page(s) 3673, ISSN 1996-1073
Publisher: Multidisciplinary Digital Publishing Institute (MDPI)
DOI: 10.3390/en16093673

Study on the Contamination Rate of Mineral Oil in Natural-Ester Retrofilled Transformers

Author(s): Andrés Montero, Belén García, Juan Carlos Burgos
Published in: Transactions on Dielectrics and Electrical Insulation, Issue 30, 2023, Page(s) 1641-1648, ISSN 1070-9878
Publisher: Institute of Electrical and Electronics Engineers
DOI: 10.1109/tdei.2023.3298314

Effect of TiO2 and ZnO Nanoparticles on the Performance of Dielectric Nanofluids Based on Vegetable Esters During Their Aging

Author(s): Inmaculada Fernández, Rafael Valiente, Félix Ortiz, Carlos J. Renedo, Alfredo Ortiz
Published in: Nanomaterials, Issue 10/4, 2020, Page(s) 692, ISSN 2079-4991
Publisher: MDPI
DOI: 10.3390/nano10040692

Moisture dynamics in natural-ester filled transformers

Author(s): Rafael Villarroel, Belén García de Burgos, Diego Fernando García
Published in: International Journal of Electrical Power & Energy Systems, Issue 124, 2021, Page(s) 106172, ISSN 0142-0615
Publisher: Elsevier BV
DOI: 10.1016/j.ijepes.2020.106172

Compatibility of Esters with Cellulosic Insulation Materials

Author(s): Cristina Méndez Gutiérrez, Carmela Oria Alonso, Cristina Fernández Diego, Inmaculada Fernández Diego, Cristian Olmo Salas, Ahmet Kerem Köseoğlu, Ramazan Altay, Alfredo Ortiz Fernández
Published in: Alternative Liquid Dielectrics for High Voltage Transformer Insulation Systems: Performance Analysis and Applications, 2022, Page(s) 43-84, ISBN 9781119800187
Publisher: Wiley-IEEE
DOI: 10.1002/9781119800194.ch3

Analysis of transformer insulation systems with dielectric nanofluid

Author(s): Daniel Pérez Rosa
Published in: 2022
Publisher: Universidad Carlos III Madrid

Evolución de las propiedades térmicas y dieléctricas de un aceite vegetal de transformador mejorado con nanopartículas

Author(s): Cristian Olmo Salas
Published in: 2020
Publisher: Universidad de Cantabria

Análisis de la degradación de los materiales aislantes en transformadores inmersos en líquidos biodegradables

Author(s): Cristina Méndez Gutiérrez
Published in: 2023
Publisher: Universidad de Cantabria

Application of nanodielectric fluids for the improvement of the insulation system of power transformers

Author(s): Victor Antonio Primo Cano
Published in: 2019
Publisher: Universidad Carlos III Madrid

Life management of transformers retro-filled with biodegradable insulating fluids

Author(s): Andrés Montero Romero
Published in: 2023
Publisher: Universidad Carlos III Madrid

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