1. A novel approach to determine moisture migration through pressboard insulation using FEM
- Author
-
Manish Vashishtha and Sruti Chakraborty
- Subjects
Pressboard ,Materials science ,Steady state ,Moisture ,Dielectric strength ,Drying time ,law ,Transient (oscillation) ,Composite material ,Transformer ,Finite element method ,law.invention - Abstract
Moisture measurement in transformer pressboard is an integral part of monitoring mechanical and dielectric strength of insulation. The existing correlations for pressboard moisture mostly considers non-impregnated and steady state (equilibrium) conditions at oil and pressboard interface. In this paper, we discuss the transient moisture migration in oil impregnated pressboard insulation between two consecutive equilibrium conditions with due emphasis on insulation properties. This study is helpful in determining the insulation drying time and moisture retention in impregnated pressboards without conducting extensive experimentation.
- Published
- 2017