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首页> 外文期刊>International Journal of Heat and Mass Transfer >Determination of moisture diffusion coefficient in transformer paper using thermogravimetric analysis
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Determination of moisture diffusion coefficient in transformer paper using thermogravimetric analysis

机译：热重分析法测定变压器纸中水分扩散系数

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摘要

This paper presents the methodology used and the results obtained in the determination of moisture diffusion coefficient of non-impregnated transformer insulating paper. In order to establish the diffusion coefficient, drying curves of paper samples were obtained by means of thermogravimetric experiments. The diffusion coefficient parameters were found by applying an optimization process based on genetic algorithms. The error function between measured and simulated curves was determined, and the parameters achieving the best correspondence between measured and estimated values were obtained. As a result, a new equation for the diffusion coefficient of non-impregnated insulating paper is proposed, depending on average moisture concentration, temperature and insulation thickness. The proposed coefficient was validated through experimental cases finding a good agreement between the experimental drying curves and those obtained by simulation using the diffusion coefficient. The proposed diffusion coefficient can be used for the determination of the time required to dry power transformers in factory.
机译：本文介绍了用于确定非浸渍变压器绝缘纸水分扩散系数的方法和获得的结果。为了建立扩散系数，通过热重实验获得了纸样品的干燥曲线。通过应用基于遗传算法的优化过程找到扩散系数参数。确定了测量曲线和模拟曲线之间的误差函数，并获得了实现测量值和估计值之间最佳对应的参数。结果，根据平均水分含量，温度和绝缘厚度，提出了一种新的非浸渍绝缘纸扩散系数方程。通过在实验案例中找到实验干燥曲线与使用扩散系数模拟获得的干燥曲线之间的良好一致性，对提出的系数进行了验证。建议的扩散系数可用于确定工厂中干燥电力变压器所需的时间。

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