纤维素老化对矿物油浸绝缘纸中水分扩散的影响
|
摘要
纤维素老化对绝缘纸吸湿性能具有显著的影响,为了能够更有效地评估绝缘纸中的水分含量,该文针对纤维素老化对绝缘纸中水分扩散的影响进行了研究。首先,通过试验材料处理及测试得到了不同温度、不同厚度下油浸绝缘纸中暂态水分;然后,基于Fick第二扩散定律及有限元仿真模型提取得到了不同老化油浸绝缘纸的水分扩散系数及平衡时间常数;最后,研究了纤维素老化对扩散系数及平衡时间常数的影响,在研究温度范围内,得出扩散系数的经验表达式。研究结果表明,随着绝缘纸老化程度的加深,在相同温度下,绝缘纸水分吸收速率上升,稳态水分含量降低,水分平衡时间降低。
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.
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.
引文
[1]廖瑞金,杨丽君,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.Liao Ruijin,Yang Lijun,Zheng Hanbo,et al.Relationship between frequency domain dielectric characteristic quantity and aging status of transformer oil-paper insulation[J].Transactions of China Electrotechnical Society,2012,27(5):1-12.
[2]魏建林,王世强,彭华东,等.变压器油纸绝缘的介电响应特性研究-加速热老化的介电谱[J].电工技术学报,2012,27(5):56-62.Wei Jianlin,Wang Shiqiang,Peng Huadong,et al.Investigation of dielectric response characteristics of transformer oil-paper insulation-dielectric spectroscopy of acceleratedly thermal aging[J].Transactions of China Electrotechnical Society,2012,27(5):56-62.
[3]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.Disequilibrium moisture partition in oil-paper insulation[J].Proceedings of the CSEE,2008,28(7):134-140.
[4]王东阳,周利军,陈雪骄,等.变压器油纸绝缘系统低频介电参数方程[J].电工技术学报,2017,32(17):218-224.Wang Dongyang,Zhou Lijun,Chen Xuejiao,et al.Complex relative permittivity expressions of oil-paper insulation for low frequency domain dielectric response[J].Transactions of China Electrotechnical Society,2017,32(17):218-224.
[5]Martin D,Perkasa C,Lelekakis N.Measuring paper water content of transformers:a new approach using cellulose isotherms in nonequilibrium conditions[J].IEEE Transactions on Power Delivery,2013,28(3):1433-1439.
[6]王东阳,周利军,刘伟迪,等.纤维素老化对油纸绝缘平衡水分含量评估的影响[J].中国电机工程学报,2018,38(6):1889-1894.Wang Dongyang,Zhou Lijun,Liu Weidi,et al.Influence of cellulose aging on the equilibrium moisture content estimation of oil-paper insulation[J].Proceedings of the CSEE,2018,38(6):1889-1894.
[7]Fabre J,Pichon A.Deteriorating processes and products of paper in oil,application to transformers[C]//International Conference on Large High Voltage Electric System(CIGRE),Paris,1960:137.
[8]Oommen T V.Moisture equilibrium in paper-oil systems[C]//Proceedings of the Electrical/Electronics Insulation Conference,Chicago,1983:162-166.
[9]Li Jian,Zhang Zhaotao,Grzybowski S,et al.Characteristics of moisture diffusion in vegetable oilpaper insulation[J].IEEE Transactions on Dielectrics and Electrical Insulation,2012,19(5):1650-1656.
[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[C]//Conference of Electrical Insulation and Dielectric Phenomena,Atlanta,1998:341-344.
[11]Garcia B,Burgos J C,Alonso A,et al.A moisture-inoil model for power transformer monitoring-part II:experimental verification[J].IEEE Transactions on Power Delivery,2005,20(2):1423-1429.
[12]Garcia B,Burgos J C,Alonso A,et al.A moisture-inoil model for power transformer monitoring-part I:theoretical foundation[J].IEEE Transactions on Power Delivery,2005,20(2):1417-1422.
[13]Zhou Lijun,Wu Guangning,Liu Jun.Modelling of transient moisture equilibrium in oil-paper insulation[J].IEEE Transactions on Dielectrics and Electrical Insulation,2008,15(3):872-878.
[14]朱孟兆.油浸绝缘纸热老化机理的分子动力学研究[D].重庆:重庆大学,2011.
[15]Przybylek P.The influence of temperature and aging of cellulose on water distribution in oil-paper insulation[J].IEEE Transactions on Dielectrics and Electrical Insulation,2013,20(2):552-556.
[16]Liao Ruijin,Lin Yuandi,Guo Pei,et al.Thermal aging effects on the moisture equilibrium curves of mineral and mixed oil-paper insulation systems[J].IEEETransactions on Dielectrics and Electrical Insulation,2015,22(2):842-850.
[17]Tu Youping,Chen Jingjing,Wang Shaohe,et al.Moisture migration in oil-impregnated film insulation under thermal aging[J].IEEE Transactions on Dielectrics and Electrical Insulation,2016,23(2):1135-1141.
[18]王伟,马志青,李成榕,等.纤维素老化对油纸绝缘水分平衡的影响[J].中国电机工程学报,2012,32(31):100-105,224.Wang Wei,Ma Zhiqing,Li Chengrong,et al.Impact of cellulose aging on moisture equilibrium of oilpressboard insulation[J].Proceedings of the CSEE,2012,32(31):100-105,224.
[19]Du Yanqing.Measurements and modeling of moisture diffusion processes in transformer insulation using interdigital dielectrometry sensors[D].UK:University of Cambridge,1999.
[20]Villarroel R,García D F,García B,et al.Diffusion coefficient in transformer pressboard insulation-part1:non impregnated pressboard[J].IEEE Transactions on Dielectrics and Electrical Insulation,2014,21(1):360-368.
[2]魏建林,王世强,彭华东,等.变压器油纸绝缘的介电响应特性研究-加速热老化的介电谱[J].电工技术学报,2012,27(5):56-62.Wei Jianlin,Wang Shiqiang,Peng Huadong,et al.Investigation of dielectric response characteristics of transformer oil-paper insulation-dielectric spectroscopy of acceleratedly thermal aging[J].Transactions of China Electrotechnical Society,2012,27(5):56-62.
[3]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.Disequilibrium moisture partition in oil-paper insulation[J].Proceedings of the CSEE,2008,28(7):134-140.
[4]王东阳,周利军,陈雪骄,等.变压器油纸绝缘系统低频介电参数方程[J].电工技术学报,2017,32(17):218-224.Wang Dongyang,Zhou Lijun,Chen Xuejiao,et al.Complex relative permittivity expressions of oil-paper insulation for low frequency domain dielectric response[J].Transactions of China Electrotechnical Society,2017,32(17):218-224.
[5]Martin D,Perkasa C,Lelekakis N.Measuring paper water content of transformers:a new approach using cellulose isotherms in nonequilibrium conditions[J].IEEE Transactions on Power Delivery,2013,28(3):1433-1439.
[6]王东阳,周利军,刘伟迪,等.纤维素老化对油纸绝缘平衡水分含量评估的影响[J].中国电机工程学报,2018,38(6):1889-1894.Wang Dongyang,Zhou Lijun,Liu Weidi,et al.Influence of cellulose aging on the equilibrium moisture content estimation of oil-paper insulation[J].Proceedings of the CSEE,2018,38(6):1889-1894.
[7]Fabre J,Pichon A.Deteriorating processes and products of paper in oil,application to transformers[C]//International Conference on Large High Voltage Electric System(CIGRE),Paris,1960:137.
[8]Oommen T V.Moisture equilibrium in paper-oil systems[C]//Proceedings of the Electrical/Electronics Insulation Conference,Chicago,1983:162-166.
[9]Li Jian,Zhang Zhaotao,Grzybowski S,et al.Characteristics of moisture diffusion in vegetable oilpaper insulation[J].IEEE Transactions on Dielectrics and Electrical Insulation,2012,19(5):1650-1656.
[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[C]//Conference of Electrical Insulation and Dielectric Phenomena,Atlanta,1998:341-344.
[11]Garcia B,Burgos J C,Alonso A,et al.A moisture-inoil model for power transformer monitoring-part II:experimental verification[J].IEEE Transactions on Power Delivery,2005,20(2):1423-1429.
[12]Garcia B,Burgos J C,Alonso A,et al.A moisture-inoil model for power transformer monitoring-part I:theoretical foundation[J].IEEE Transactions on Power Delivery,2005,20(2):1417-1422.
[13]Zhou Lijun,Wu Guangning,Liu Jun.Modelling of transient moisture equilibrium in oil-paper insulation[J].IEEE Transactions on Dielectrics and Electrical Insulation,2008,15(3):872-878.
[14]朱孟兆.油浸绝缘纸热老化机理的分子动力学研究[D].重庆:重庆大学,2011.
[15]Przybylek P.The influence of temperature and aging of cellulose on water distribution in oil-paper insulation[J].IEEE Transactions on Dielectrics and Electrical Insulation,2013,20(2):552-556.
[16]Liao Ruijin,Lin Yuandi,Guo Pei,et al.Thermal aging effects on the moisture equilibrium curves of mineral and mixed oil-paper insulation systems[J].IEEETransactions on Dielectrics and Electrical Insulation,2015,22(2):842-850.
[17]Tu Youping,Chen Jingjing,Wang Shaohe,et al.Moisture migration in oil-impregnated film insulation under thermal aging[J].IEEE Transactions on Dielectrics and Electrical Insulation,2016,23(2):1135-1141.
[18]王伟,马志青,李成榕,等.纤维素老化对油纸绝缘水分平衡的影响[J].中国电机工程学报,2012,32(31):100-105,224.Wang Wei,Ma Zhiqing,Li Chengrong,et al.Impact of cellulose aging on moisture equilibrium of oilpressboard insulation[J].Proceedings of the CSEE,2012,32(31):100-105,224.
[19]Du Yanqing.Measurements and modeling of moisture diffusion processes in transformer insulation using interdigital dielectrometry sensors[D].UK:University of Cambridge,1999.
[20]Villarroel R,García D F,García B,et al.Diffusion coefficient in transformer pressboard insulation-part1:non impregnated pressboard[J].IEEE Transactions on Dielectrics and Electrical Insulation,2014,21(1):360-368.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |