Title :
Modeling of transient moisture equilibrium in oil-paper insulation
Author :
Zhou, L.J. ; Wu, G.N. ; Liu, J.
Author_Institution :
Coll. of Electr. Eng., Southwest Jiaotong Univ., Chengdu
fDate :
6/1/2008 12:00:00 AM
Abstract :
This paper introduces a new model for transient moisture equilibrium in oil-paper insulation, easily applicable even in a continuous way, based on Fick´s second law. According to the model, the moisture concentration in paper follows step response function, but the equilibration time constant changes with time since it depends on temperature, paper thickness, equilibration moisture in oil-paper insulation, and number of oil-paper interfaces. The model is validated against experimental data.
Keywords :
chemical equilibrium; insulating materials; moisture; oils; paper; Fick second law; equilibration moisture; moisture concentration; oil paper insulation; paper thickness; step response function; transient moisture equilibrium; Dielectrics and electrical insulation; IEC standards; Moisture measurement; Oil insulation; Partial discharges; Petroleum; Power transformer insulation; Power transformers; Temperature dependence; Transient analysis;
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
DOI :
10.1109/TDEI.2008.4543125
