Use of alternative fluids in very high-power transformers: experimental and numerical thermal studies

Abstract: 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 fire-safety properties. This paper compares the cooling capacity of two ester-based fluids 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 first approximation, according to the comparison developed, ester-based fluids 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.

Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 Autoría: Altay R., Santisteban A., Olmo C., Renedo C.J., Fernandez A.O., Ortiz F., Delgado F.,

 Fuente: IEEE Access, 2020, 8, 207054-207062

Editorial: Institute of Electrical and Electronics Engineers Inc.

 Fecha de publicación: 27/11/2020

Nº de páginas: 9

Tipo de publicación: Artículo de Revista

 DOI: 10.1109/ACCESS.2020.3037672

ISSN: 2169-3536

Proyecto español: PID2019-107126RB-C22

Proyecto europeo: info:eu-repo/grantAgreement/EC/H2020/823969/EU/Raising knowledge and developing technology for the design and deployment of high-performance power transformers immersed in biodegradable fluids"BIOTRAFO"/BIOTRAFO/

Url de la publicación: https://doi.org/10.1109/ACCESS.2020.3037672