Back to Search
Start Over
Assessment on Oil-Paper Insulation Aging of Transformer Based on Dielectric Response Model.
- Source :
- Electric Power Components & Systems; 2019, Vol. 47 Issue 13, p1145-1155, 11p
- Publication Year :
- 2019
-
Abstract
- For nondestructive assessment of insulation aging in power transformer, dielectric response technology is usually used to evaluate the oil-paper insulation aging. In this paper, a quantitative evaluation method of insulation aging based on Davidson-Cole model is proposed. The oil-paper insulation equivalent Debye model parameters of transformer are extracted by exponential function fitting. According to the complex permittivity of oil-paper insulation, the parameters of Davidson-Cole model are extracted by fitting algorithm. Under laboratory conditions, accelerated thermal aging test are carried out. The quantitative relationship between Davidson-Cole model parameters and aging of oil-paper insulation is analyzed. The experimental results show that the Davidson-Cole model parameters are directly related to the aging time. It is found that the parameters β and Δε of the Davidson-Cole model gradually decreases and the parameter τ gradually increases with the polymerization degree of oil-impregnated paper. Therefore, according to the quantitative characterization of the model parameters, the aging of transformer oil-paper insulation can be effectively evaluated, which is helpful to realize the nondestructive testing of polymerization degree in oil-impregnated pressboard (paper) power transformer. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 15325008
- Volume :
- 47
- Issue :
- 13
- Database :
- Complementary Index
- Journal :
- Electric Power Components & Systems
- Publication Type :
- Academic Journal
- Accession number :
- 139861822
- Full Text :
- https://doi.org/10.1080/15325008.2019.1663454