1. Inversion of Oil-Immersed Paper Resistivity in Transformer Based on Dielectric Loss Factor
- Author
-
Yiming Xie, Shuo Jin, Yongqing Deng, Jiangjun Ruan, Yu Tian, and Yu Shi
- Subjects
Materials science ,General Computer Science ,Transformer oil ,020209 energy ,Acoustics ,02 engineering and technology ,Dielectric ,Low frequency ,law.invention ,Physics::Fluid Dynamics ,Newton-Raphson method ,law ,Electrical resistivity and conductivity ,0202 electrical engineering, electronic engineering, information engineering ,General Materials Science ,Transformer ,Dielectric loss factor ,General Engineering ,Inversion ,Finite element method ,oil-immersed paper resistivity ,dielectric loss factor ,transformer ,020201 artificial intelligence & image processing ,lcsh:Electrical engineering. Electronics. Nuclear engineering ,lcsh:TK1-9971 - Abstract
The aging of the transformer oil-paper insulation distributes spatially, which results in changes in paper resistivity in different regions. This paper establishes an iterative inversion algorithm using the finite element method to calculate the oil-immersed paper resistivity in different regions of a transformer. This algorithm sets the transformer dielectric loss factor tan δ at low frequency, the dielectric parameters of the transformer oil as inputs and the oil-immersed paper resistivity as output. The resistivity obtained from inversion can be used as a reference to access the insulation state of the oil-paper insulation. This paper aims at achieving the nondestructive detection of the partial state of the oil-paper insulation.
- Published
- 2019