Disequilibrium moisture partition in oil-paper insulation

作者：Zhou Li Jun^*; Tang Hao; Zhang Xue Qin; Wu Guang Ning

来源：Proceedings of the CSEE, 2008, 28(7): 134-140.

• Equilibrium time
• Fick second law
• Oil paper

On basis of Fick';s second law, a partial differential equation is designed to analyze the moisture diffusing in the oil-paper insulation. By analyzing the boundary condition and solving the equation, a set of curves for disequilibrium moisture concentration distributing along thick direction in paper at regular intervals are obtained. By integrating the curves, a curve for average moisture concentration in paper changing with time is obtained. Both the numerical calculation and experiment both show the curve is exponent, but the equilibration time is affected by the temperature, the equilibration moisture, the thickness of the paper, and the permeating modes. By the compute simulation, the four effects are validated independent, and the equation for counting the equilibrium time is obtained.

• 出版日期2008
• 单位西南交通大学