油纸绝缘微水二次扩散过渡过程的分析

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摘要以菲克第二定律为基础建立数学模型,分析了变压器油纸绝缘纸中水分一次扩散未达到稳态时,外部条件改变导致绝缘纸中稳态水分含量改变,进而引发的绝缘纸中水分发生二次扩散过程。重点分析了由于一次扩散不充分引起的二次扩散过程中的过渡过程,并进行了实验验证。提出表征二次扩散过渡过程的特征量,即过渡时间和相对误差。过渡时间是从二次扩散开始到绝缘纸中水分扩散方向处处一致的时间,受温度、纸厚和一次扩散平衡率的独立作用;相对误差是以一次扩散水分均值作为二次扩散水分起始分布造成的误差,相对误差峰值表征二次扩散过渡过程的强度,受一次扩散平衡率、二次扩散稳态水分含量影响,相对误差峰值时间表征二次扩散过渡过程的速度,受温度和纸厚的影响。

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	林元棣
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关键词 ：菲克定律, 油纸绝缘, 水分扩散, 过渡过程

Abstract：On basis of Fick’s second law, a mathematical model is established to analyze the secondary diffusion process of moisture in oil-paper insulation. The secondary diffusion occurs when the external conditions change during the first diffusion. Analysis focuses on the transient process during secondary diffusion, which is initiated by the insufficiency of the first diffusion and is verified by experiments. Two features of the transient process are proposed, namely transition time and relative error. Transient time is the time from the beginning of secondary diffusion to the time when the moisture diffusion direction is consistent everywhere. Transient time is independent of the temperature, paper thickness and the balance ratio of the first diffusion. Relative error emerges when the average moisture content of first diffusion is used as the initial distribution of secondary diffusion. The peak of relative error represents the strength of the transient process, which is influenced by the balance ratio of the first diffusion and steady moisture content. The peak time of relative error represents the speed of transient process, which is influenced by the temperature and paper thickness.

Key words： Fick’s law oil-paper insulation moisture diffusion transient process

收稿日期: 2014-02-22 出版日期: 2016-07-11

PACS:

TM21

基金资助:国家自然科学基金资助项目（51277187）

通讯作者: 林元棣男,1988年生,博士研究生,研究方向为电气设备绝缘状态监测。E-mail: linyuandiinter@163.com（通信作者）

作者简介: 廖瑞金男,1963年生,教授,博士生导师,研究方向为电气设备绝缘在线监测与故障诊断研究和高电压测试技术。E-mail: rjliao@cqu.edu.cn

引用本文:

林元棣, 廖瑞金, 夏桓桓, 杨丽君. 油纸绝缘微水二次扩散过渡过程的分析[J]. 电工技术学报, 2016, 31(10): 16-25. Lin Yuandi, Liao Ruijin, Xia Huanhuan, Yang Lijun. Analysis of Transition Process During Secondary Diffusion of Moisture in Oil-Paper Insulation. Transactions of China Electrotechnical Society, 2016, 31(10): 16-25.

链接本文:

https://dgjsxb.ces-transaction.com/CN/Y2016/V31/I10/16

[1] 陈伟根, 滕黎, 刘军, 等. 基于遗传优化支持向量机的变压器绕组热点温度预测模型[J]. 电工技术学报, 2014, 29(1): 44-51.
Chen Weigen, Teng Li, Liu Jun, et al. Transformer winding hot-spot temperature prediction model of support vector machine optimized by genetic algorithm[J]. Transactions of China Electrotechnical Society, 2014, 29(1): 44-51.
[2] 马志钦, 廖瑞金, 郝建, 等. 温度对油纸绝缘极化去极化电流的影响[J]. 电工技术学报, 2014, 29(4): 290-297.
Ma Zhiqin, Liao Ruijin, Hao Jian, et al. Influence of temperature on polarization and depolarization current of oil-paper insulation[J]. Transactions of China Electrotechnical Society, 2014, 29(4): 290- 297.
[3] 梁帅伟, 廖瑞金, 郝建, 等. 一种抗老化绝缘油对绝缘纸热老化影响及原因分析[J]. 电工技术学报, 2012, 27(5): 21-25.
Liang Shuaiwei, Liao Ruijin, Hao Jian, et al. Effects on oil-immersed paper for an antioxidation insulation oil and cause analysis[J]. Transactions of China Electrotechnical Society, 2012, 27(5): 21-25.
[4] Fofana I, Wasserberg V, Borsi H, et al. Challenge of mixed insulating liquids for use in high-voltage transformers, part 2: investigations of mixed liquid impregnated paper insulation[J]. IEEE Electrical Insulation Magazine, 2002, 18(4): 5-16.
[5] Emsley A M, Stevens G C. Review of chemical indicators of degradation of cellulosic electrical paper insulation in oil-filled transformers[J]. IEEE Science Measurement and Technology, 1994, 141(5): 324-334.
[6] 廖瑞金, 郝建, 梁帅伟, 等. 水分和酸对矿物油与天然酯混合油—纸绝缘热老化的影响[J]. 电工技术学报, 2010, 25(7): 31-37.
Liao Ruijin, Hao Jian, Liang Shuaiwei, et al. Influence of water and acid on the thermal aging of mineral oil mixed with natural ester oil-paper insul- ation[J]. Transactions of China Electrotechnical Society, 2010, 25(7): 31-37.
[7] 廖瑞金, 孙会刚, 尹建国, 等. 水分对油纸绝缘热老化速率及热老化特征参量的影响[J]. 电工技术学报, 2012, 27(5): 34-42.
Liao Ruijin, Sun Huigang, Yin Jianguo, et al. Influence on the thermal aging rate and thermal aging characteristics caused by water content of oil-paper insulation[J]. Transactions of China Electrotechnical Society, 2012, 27(5): 34-42.
[8] 杨丽君, 廖瑞金, 郑含博, 等. 电力变压器油纸绝缘热老化研究综述[J]. 电工技术学报, 2012, 27(5): 1-12.
Yang Lijun, Liao Ruijin, Zheng Hanbo, et al. Reviews on oil-paper insulation thermal aging in power transformers[J]. Transactions of China Electro- technical Society, 2012, 27(5): 1-12.
[9] Garcia B, Burgos J C, Alonso A, et al. A moisture- in-oil model for power transformer monitoring—part I: theoretical foundation[J]. IEEE Transactions on Power Delivery, 2005, 20(2): 1417-1422.
[10] Garcia B, Burgos J C, Alonso A, et al. A moisture- in-oil model for power transformer monitorring—part II: experimental verification[J]. IEEE Transactions on Power Delivery, 2005, 20(2): 1423-1429.
[11] IEC 60814 Insulating liquids-oil-impregnated paper and pressboard-determination of water by automatic coulometric Karl Fischer titration[S]. 1997.
[12] Fabre J, Pichon A. Deteriorating processes and products of paper in oil application to trans- formers[C]//International Conference on Large High Voltage Electric System (CIGRE), Paris, 1960, 137: 18.
[13] Oommen T V. Moisture equilibrium in paper-oil systems[C]//Proceedings of the Electrical I Elec- tronics Insulation Conference, Chicago, 1983: 162- 166.
[14] Griffin P J, Bruce C M, Christie J D. Comparison of water equilibrium in silicone and mineral oil trans- formers[C]//Minutes of the Fifty-Fifth Annual Inter- national Conference of Doble Clients, 1988: 9-10.
[15] 周利军, 汤浩, 张血琴, 等. 油纸绝缘微水扩散的暂态分布模型[J]. 中国电机工程学报, 2008, 28(7): 134-140.
Zhou Lijun, Tang Hao, Zhang Xueqin, et al. Disequi- librium moisture partition in oil-paper insulation[J]. Proceedings of the CSEE, 2008, 28(7): 134-140.
[16] Zhou L J, Wu G N, Liu J. Modeling of transient moisture equilibrium in oil-paper insulation[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2008, 15(3): 872-878.
[17] Li J, Zhang Z T, Grzybowski S, et al. Characteristics of moisture diffusion in vegetable oil-paper insu- lation[J]. IEEE Transactions on Dielectrics and Elec- trical Insulation, 2012, 19(5): 1650-1656.
[18] Bird R B, Steuart W E, Lightfoot E N. Transport phenomena[M]. New York: John Wiley & Sons Inc., 2002.
[19] Du Y, Zahn M, Lesieutre B C. Dielectrometry measurements of effects of moisture and anti-static additive on transformer board[C]//IEEE Conference on Electrical Insulation and Dielectric Phenomena, Minneapolis, MN, 1997: 226-229.
[20] Oommen T V. Moisture equilibrium charts for transformer lnsulation drying practice[J]. IEEE Transa- ctions Power Apparatus Systems, 1984, 103(10): 3063-3067.
[21] IEC60641—3—1 Specification for pressboard and presspaper for electrical purpose. Part 3: specifi- cations for individual materials; sheet 1: requirements for pressboard, types B.0.1, B.2.1, B.3.1, B.3.3, B.4.1, B.4.3, B.5.1, B.6.1 and B.7.1[S]. 1992.