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Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Use of alternative fluids in very high-power transformers: experimental and numerical thermal studies
The very high-power transformer lifespan depends mainly on the temperature that cellulose insulation reaches during its operation. Traditionally, its cooling has been carried out using mineral oil as coolant. Nowadays, alternative ester-based liquids are under study as substitutes due to their better environmental and re-safety properties. This paper compares the cooling capacity of two ester-based uids with that of a mineral oil using a 3D numerical model of a 100 MVA low voltage winding of a power transformer with axial cooling system and ONAN cooling mode. Heat-run test results with mineral oil have been used to validate this model. As a rst approximation, according to the comparison developed, esterbased uids could replace mineral oils in this type of transformers when they are going to work in a range of powers close to the rated one. ; This project has received funding from the European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No 823969. Also, we acknowledge the support of the Spanish Ministry of Science and Innovation by means of the National Research Project "Asset management of biodegradable-fluid-based transformers'' (PID2019-107126RB-C22) and the Universities and Research Council of the Government of Cantabria by means of the grant "Biodegradable fluids in electrical power transformers: solid dielectric impregnation and thermal modeling with THNM'', VP32, 2019-2.
Use of alternative fluids in very high-power transformers: experimental and numerical thermal studies
The very high-power transformer lifespan depends mainly on the temperature that cellulose insulation reaches during its operation. Traditionally, its cooling has been carried out using mineral oil as coolant. Nowadays, alternative ester-based liquids are under study as substitutes due to their better environmental and re-safety properties. This paper compares the cooling capacity of two ester-based uids with that of a mineral oil using a 3D numerical model of a 100 MVA low voltage winding of a power transformer with axial cooling system and ONAN cooling mode. Heat-run test results with mineral oil have been used to validate this model. As a rst approximation, according to the comparison developed, esterbased uids could replace mineral oils in this type of transformers when they are going to work in a range of powers close to the rated one. ; This project has received funding from the European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No 823969. Also, we acknowledge the support of the Spanish Ministry of Science and Innovation by means of the National Research Project "Asset management of biodegradable-fluid-based transformers'' (PID2019-107126RB-C22) and the Universities and Research Council of the Government of Cantabria by means of the grant "Biodegradable fluids in electrical power transformers: solid dielectric impregnation and thermal modeling with THNM'', VP32, 2019-2.
Use of alternative fluids in very high-power transformers: experimental and numerical thermal studies
Altay, Ramazan (Autor:in) / Santisteban Díaz, Agustín (Autor:in) / Olmo Salas, Cristian (Autor:in) / Renedo Estébanez, Carlos Javier (Autor:in) / Ortiz Fernández, Alfredo (Autor:in) / Ortiz Fernández, Félix (Autor:in) / Delgado San Román, Fernando (Autor:in) / Universidad de Cantabria
27.11.2020
doi:10.1109/ACCESS.2020.3037672
IEEE Access, 2020, 8, 207054-207062
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
DDC:
690
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