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Mechanical Behaviour of the Cellulosic Dielectric Materials of Windings in Power Transformers in Operation
- Source :
- XXIII International Conference on Electrical Machines (ICEM), 2018, Alexandroupoli, Grecia, 2400-2406, UCrea Repositorio Abierto de la Universidad de Cantabria, Universidad de Cantabria (UC)
- Publication Year :
- 2018
- Publisher :
- IEEE, 2018.
-
Abstract
- Power transformers are crucial elements in electrical systems, and the end of their useful life is commonly conditioned by the degradation of the cellulosic insulation materials inside them. These materials are subjected to elevated temperatures and mechanical stresses, generated by electrical solicitations which deform the copper conductors and subsequently the paper, and also to the chemical reactions which take place in the dielectric oil in which the paper is impregnated. In order to better understand the behaviour of cellulosic insulation, we have studied the previous bibliography analysing the mechanical behaviour of cellulosic materials. At present, there are no experimental results analysing how the paper responds to the deformation suffered by the copper conductor in a realistic situation. We have developed a simulation model describing the mechanical behaviour of a standardised copper conductor wrapped with four layers of dielectric paper, using ANSYS Workbench Static Structural, which will be compared with experimental results afterwards.
- Subjects :
- Materials science
Transformer oil
Power transformers
02 engineering and technology
Dielectric
Copper conductor
engineering.material
Stress
01 natural sciences
Oil insulation
Strain
Tensile strength
Stress (mechanics)
0103 physical sciences
Composite material
Electrical conductor
010302 applied physics
Elastoplasticity
021001 nanoscience & nanotechnology
Ageing
Computational modelling
Electromagnetic coil
Paper insulation
engineering
Workbench
Deformation (engineering)
0210 nano-technology
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- 2018 XIII International Conference on Electrical Machines (ICEM)
- Accession number :
- edsair.doi.dedup.....081f939617bff7eb3c0dfa7e40951905