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Aging condition assessment of transformer oil-immersed cellulosic insulation based upon the average activation energy method
- Source :
- Cellulose. 26:3891-3908
- Publication Year :
- 2019
- Publisher :
- Springer Science and Business Media LLC, 2019.
-
Abstract
- It is widely accepted that the service life of transformer oil–paper insulation is determined by the aging condition of transformer cellulosic insulation. Therefore, it is rather meaningful to accurately and reliably evaluate the aging condition of transformer cellulose insulation. Existing studies have shown that activation energy can eliminate the temperature effect on the frequency dielectric spectroscopy, however, the traditional activation energy might not be suitable for assessing the aging condition of transformer cellulosic insulation. The aim of the work is to assess the aging condition of cellulosic insulation by using average activation energy technique. The experiment process is firstly discussed. Then, the second-order dynamic equation formed by Arrhenius equation and Ekenstam equation is strictly investigated to accurately calculate the degree of polymerization value of transformer cellulosic insulation. The experimental results preliminarily show that the average activation energy can effectively assess aging condition of transformer cellulosic insulation.
- Subjects :
- Arrhenius equation
Materials science
Polymers and Plastics
Transformer oil
02 engineering and technology
Activation energy
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
Condition assessment
0104 chemical sciences
law.invention
symbols.namesake
Cellulosic ethanol
law
Service life
symbols
Cellulose insulation
Composite material
0210 nano-technology
Transformer
Subjects
Details
- ISSN :
- 1572882X and 09690239
- Volume :
- 26
- Database :
- OpenAIRE
- Journal :
- Cellulose
- Accession number :
- edsair.doi...........029883c82a4962d4d8d56f0eb35fd431