Effects of Cellulose Ageing on Moisture Diffusion in Paper Immersed with Mineral Oil

被引：0
|
作者：
Zhou L. [1 ]
Li H. [1 ]
Wang A. [1 ]
Wang D. [2 ]
Liao W. [1 ]
机构：
[1] College of Electrical Engineering, Southwest Jiaotong University, Chengdu
[2] CRRC Qingdao Sifang Co. Ltd, Qingdao
来源：
Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | 2019年 / 34卷 / 07期
关键词：
Cellulose aging; Diffusion coefficient; Equilibrium time constant; Insulation paper; Moisture diffusion;
D O I：
10.19595/j.cnki.1000-6753.tces.180429
中图分类号：
学科分类号：
摘要：
Cellulose aging has obvious effects on its moisture absorption property. In order to evaluate the moisture content of insulation paper more effectively, this paper studies the influence of cellulose aging on the moisture diffusion in insulation paper. First, the transient moisture in the oil immersed insulation paper under different temperatures and different thickness was obtained by handing and testing experimental materials. Then, basing on the Fick's second law and the finite element simulation model, the moisture diffusion coefficient and the equilibrium time constant of different aging oil immersed insulation paper are obtained. Finally, the effects of cellulose aging on diffusion coefficient and equilibrium time constant were studied. In the study temperature range, the diffusion coefficient has the empirical expression. The results show that with the aging of insulation paper, the rate of moisture absorption increases, and the equilibrium moisture content of insulation paper decreases at the same temperature. Besides, the equilibrium time constant decreases with aging at the same temperature. © 2019, Electrical Technology Press Co. Ltd. All right reserved.
引用
收藏
页码：1536 / 1543
页数：7
相关论文
共 19 条
  • [1] Liao R., Yang L., Zheng H., Et al., Relationship between frequency domain dielectric characteristic quantity and aging status of transformer oil-paper insulation, Transactions of China Electrotechnical Society, 27, 5, pp. 1-12, (2012)
  • [2] Wei J., Wang S., Peng H., Et al., Investigation of dielectric response characteristics of transformer oil-paper insulation-dielectric spectroscopy of acceleratedly thermal aging, Transactions of China Electrotechnical Society, 27, 5, pp. 56-62, (2012)
  • [3] Zhou L., Tang H., Zhang X., Et al., Disequilibrium moisture partition in oil-paper insulation, Proceedings of the CSEE, 28, 7, pp. 134-140, (2008)
  • [4] Wang D., Zhou L., Chen X., Et al., Complex relative permittivity expressions of oil-paper insulation for low frequency domain dielectric response, Transactions of China Electrotechnical Society, 32, 17, pp. 218-224, (2017)
  • [5] Martin D., Perkasa C., Lelekakis N., Measuring paper water content of transformers: a new approach using cellulose isotherms in nonequilibrium conditions, IEEE Transactions on Power Delivery, 28, 3, pp. 1433-1439, (2013)
  • [6] Wang D., Zhou L., Liu W., Et al., Influence of cellulose aging on the equilibrium moisture content estimation of oil-paper insulation, Proceedings of the CSEE, 38, 6, pp. 1889-1894, (2018)
  • [7] Fabre J., Pichon A., Deteriorating processes and products of paper in oil, application to transformers, International Conference on Large High Voltage Electric System (CIGRE), (1960)
  • [8] Oommen T.V., Moisture equilibrium in paper-oil systems, Proceedings of the Electrical/Electronics Insulation Conference, pp. 162-166, (1983)
  • [9] Li J., Zhang Z., Grzybowski S., Et al., Characteristics of moisture diffusion in vegetable oil-paper insulation, IEEE Transactions on Dielectrics and Electrical Insulation, 19, 5, pp. 1650-1656, (2012)
  • [10] Du Y., Mamishev A.V., Lesieutre B.C., Et al., Measurement of moisture diffusion as a function of temperature and moisture concentration in transformer pressboard, Conference of Electrical Insulation and Dielectric Phenomena, pp. 341-344, (1998)
12