The organizers of the CPOTE2020 conference are pleased to invite to a special session dedicated to the H2020 project BIOTRAFO. The BIOTRAFO project analyses the effect of temperature on the designs of power transformers that use biodegradable esters as coolant, the environmental and fire performance of these liquids being also evaluated. These machines are very common in our power distribution systems. Since electricity is generated until it reaches households, it passes through an average of four transformers. Currently the liquid used in most of these machines is a petroleum derivative, since its good performance is well known. However, the environmental awareness of many companies is demanding new transformers that are cooled by esters of natural origin. In this framework, BIOTRAFO proposes a study that allows knowing the temperature in the windings of the transformer when using biodegradable liquids, which by their nature are more viscous. This temperature is a critical factor for the useful life of the transformer, due to the aging of dielectric solid materials. During the special session the results of the computational models of the temperature field in various units will be presented.

• Reduce environmental impacts
• Increase of safety (reduce fire risks)
• Promote new innovative solutions
• Promote natural oil for transformer cooling
• Determine hot-spot temperature in disk-type windings
• Define the cooling parameters of ONAN transformers
• Simulate the thermal behaviour of transformers using complex numerical and reduced order approaches

• Numerical study of 8.5 MVA disk-type power transformer cooled by biodegradable esters using coupled CFD-CFD and CFD-EMAG modelling
  Stebel Michał, Palacz Michał, Melka Bartłomiej, Bodys Jakub, Garelli Luciano, Rios Rodriguez Gustavo, Kubiczek Krzysztof, Lasek Pawel, Stepien Mariusz, Haida Michał, Pessolani Francisco, Amadei Mauro, Granata Daniel, Storti Mario, Smołka Jacek,
• Thermal analysis of a low voltage winding of a power transformer working with natural ester and mineral oil
  Santisteban Agustin, Dorella Jonathan, Garelli Luciano, Storti Mario, Delgado Fernando, Ortiz Alfredo,
• Measurement and analysis of power losses in sintered cores for power electronic devices in renewable energy systems
  Lasek Pawel, Stepien Mariusz,
• Coupled electromagnetic and thermal models of the 315 kVA distribution transformer for mineral and biodegradable oils in different climate conditions
  Melka Bartłomiej, Palacz Michał, Stebel Michał, Bodys Jakub, Haida Michał, Garelli Luciano, Rios Rodriguez Gustavo, Storti Mario, Kubiczek Krzysztof, Lasek Pawel, Stepien Mariusz, Pessolani Francisco, Amadei Mauro, Granata Daniel, Smołka Jacek,

More info and the order of the presentations are on the detailed schedule