Understanding the Ageing Performance of Alternative Dielectric Fluids
Mineral oil has traditionally been used as a cooling fluid in power transformers, but its low biodegradability and low fire point have motivated the search of alternatives. In this work, six different dielectric fluids have been studied, including four vegetable liquids, from sunflower, rapeseed, so...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IEEE
2023-01-01
|
| Series: | IEEE Access |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/10026314/ |
| _version_ | 1811173556015333376 |
|---|---|
| author | Cristina Mendez Gutierrez Alfredo Ortiz Fernandez Carlos Javier Renedo Estebanez Cristian Olmo Salas Riccardo Maina |
| author_facet | Cristina Mendez Gutierrez Alfredo Ortiz Fernandez Carlos Javier Renedo Estebanez Cristian Olmo Salas Riccardo Maina |
| author_sort | Cristina Mendez Gutierrez |
| collection | DOAJ |
| description | Mineral oil has traditionally been used as a cooling fluid in power transformers, but its low biodegradability and low fire point have motivated the search of alternatives. In this work, six different dielectric fluids have been studied, including four vegetable liquids, from sunflower, rapeseed, soybean, and palm, one synthetic ester and a mineral oil used for comparison. These oils were subjected to an accelerated thermal ageing in glass vessels at 150°C for four weeks (672 hours) in presence of Kraft insulating paper. Different oils parameters were measured during the ageing, i.e. breakdown voltage, dielectric dissipation factor, permittivity, DC resistivity, density, kinematic viscosity, flash and fire points, interfacial tension, acidity, and dissolved gases; additionally, the degree of polymerisation (DP) of the paper was measured. Results showed that the changes of the natural esters properties, except for the palm oil, were similar along the ageing time. Palm oil results were similar to those of the mineral oil, whereas synthetic ester showed a behaviour similar to natural esters. The kraft paper degradation was higher in the mineral oil, followed by the synthetic ester and the palm oil. No significant differences were found in the ageing with the natural esters. |
| first_indexed | 2024-04-10T17:48:55Z |
| format | Article |
| id | doaj.art-a46d5802c95b4e219e6917bd2d605ed6 |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-04-10T17:48:55Z |
| publishDate | 2023-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-a46d5802c95b4e219e6917bd2d605ed62023-02-03T00:00:29ZengIEEEIEEE Access2169-35362023-01-01119656967110.1109/ACCESS.2023.323989510026314Understanding the Ageing Performance of Alternative Dielectric FluidsCristina Mendez Gutierrez0https://orcid.org/0000-0002-2845-216XAlfredo Ortiz Fernandez1https://orcid.org/0000-0002-7560-2984Carlos Javier Renedo Estebanez2https://orcid.org/0000-0001-9835-6731Cristian Olmo Salas3Riccardo Maina4Electrical and Energy Engineering Department, Escuela Técnica Superior de Ingenieros Industriales y de Telecomunicación, Universidad de Cantabria, Santander, SpainElectrical and Energy Engineering Department, Escuela Técnica Superior de Ingenieros Industriales y de Telecomunicación, Universidad de Cantabria, Santander, SpainElectrical and Energy Engineering Department, Escuela Técnica Superior de Ingenieros Industriales y de Telecomunicación, Universidad de Cantabria, Santander, SpainElectrical and Energy Engineering Department, Escuela Técnica Superior de Ingenieros Industriales y de Telecomunicación, Universidad de Cantabria, Santander, SpainSea Marconi Technologies, Turin, ItalyMineral oil has traditionally been used as a cooling fluid in power transformers, but its low biodegradability and low fire point have motivated the search of alternatives. In this work, six different dielectric fluids have been studied, including four vegetable liquids, from sunflower, rapeseed, soybean, and palm, one synthetic ester and a mineral oil used for comparison. These oils were subjected to an accelerated thermal ageing in glass vessels at 150°C for four weeks (672 hours) in presence of Kraft insulating paper. Different oils parameters were measured during the ageing, i.e. breakdown voltage, dielectric dissipation factor, permittivity, DC resistivity, density, kinematic viscosity, flash and fire points, interfacial tension, acidity, and dissolved gases; additionally, the degree of polymerisation (DP) of the paper was measured. Results showed that the changes of the natural esters properties, except for the palm oil, were similar along the ageing time. Palm oil results were similar to those of the mineral oil, whereas synthetic ester showed a behaviour similar to natural esters. The kraft paper degradation was higher in the mineral oil, followed by the synthetic ester and the palm oil. No significant differences were found in the ageing with the natural esters.https://ieeexplore.ieee.org/document/10026314/Insulating papernatural estersthermal ageingtransformers |
| spellingShingle | Cristina Mendez Gutierrez Alfredo Ortiz Fernandez Carlos Javier Renedo Estebanez Cristian Olmo Salas Riccardo Maina Understanding the Ageing Performance of Alternative Dielectric Fluids IEEE Access Insulating paper natural esters thermal ageing transformers |
| title | Understanding the Ageing Performance of Alternative Dielectric Fluids |
| title_full | Understanding the Ageing Performance of Alternative Dielectric Fluids |
| title_fullStr | Understanding the Ageing Performance of Alternative Dielectric Fluids |
| title_full_unstemmed | Understanding the Ageing Performance of Alternative Dielectric Fluids |
| title_short | Understanding the Ageing Performance of Alternative Dielectric Fluids |
| title_sort | understanding the ageing performance of alternative dielectric fluids |
| topic | Insulating paper natural esters thermal ageing transformers |
| url | https://ieeexplore.ieee.org/document/10026314/ |
| work_keys_str_mv | AT cristinamendezgutierrez understandingtheageingperformanceofalternativedielectricfluids AT alfredoortizfernandez understandingtheageingperformanceofalternativedielectricfluids AT carlosjavierrenedoestebanez understandingtheageingperformanceofalternativedielectricfluids AT cristianolmosalas understandingtheageingperformanceofalternativedielectricfluids AT riccardomaina understandingtheageingperformanceofalternativedielectricfluids |