Calculating method of moisture in oil-paper insulation at arbitrary temperature

There are short of reports for the equilibrium moisture partition between oil and paper at arbitrary temperature, while it is very important, since it not only can be used to calculate the water in paper by the water in oil under equilibrium conditions, but also is the basis of studying the moisture partition in oil-paper under disequilibrium conditions. In this paper, an approach surface on basis of approaching parameters curves about the relations of the temperature, the moisture in oil, and the moisture in paper is proposed, according to which, the equilibrium moisture partition curves in oil-paper insulation at arbitrary temperatures are obtained using the existed curves under different temperatures. The method is validated by comparing the calculated curve experiment data having been published.