Use of alternative fluids in very high-power transformers: experimental and numerical thermal studies
| Autor: | Agustín Santisteban, Cristian Olmo, Alfredo Ortiz Fernández, Fernando Delgado, Ramazan Altay, Felix Ortiz, Carlos J. Renedo |
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| Přispěvatelé: | Universidad de Cantabria |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
General Computer Science experimental setup 020209 energy Nuclear engineering 02 engineering and technology Power transformers Computational fluid dynamics Cooling capacity 7. Clean energy 01 natural sciences law.invention thermal modeling law 0103 physical sciences 0202 electrical engineering electronic engineering information engineering medicine Water cooling General Materials Science Cellulose insulation Mineral oil Transformer 010302 applied physics ester-based liquids General Engineering Coolant power transformers Ester-based liquids mineral oil 13. Climate action Electromagnetic coil Thermal modeling lcsh:Electrical engineering. Electronics. Nuclear engineering Low voltage lcsh:TK1-9971 medicine.drug Experimental setup |
| Zdroj: | IEEE Access, 2020, 8, 207054-207062 UCrea Repositorio Abierto de la Universidad de Cantabria Universidad de Cantabria (UC) IEEE Access, Vol 8, Pp 207054-207062 (2020) |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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