Abstract：In the paper, the surface products of oil-impregnated insulation paper is studied during the damage process caused by partial discharge (PD), as well as gas within cavity. By means of optical microscopy and scanning electron microscopy (SEM), surface morphology is analyzed. By means of infrared spectroscopy (IR) and X-ray photoelectron spectroscopy (XPS), surface products and their constituents are analyzed. Meanwhile, variation of cavity volume is investigated. Furthermore, gas constituents and their contents within cavity are also investigated by gas chromatography-mass spectrometry (GC-MS). The results reveal that during partial-discharge damage process, the total gas volume and content of the electronegative gases within cavity alternately declines and increases, while discharge types alternate between pulse-type and pseudo-glow-type (or glow-type) discharge. “Surface droplets” and “crystalline solids” appear on insulation surface one after another. Main components of surface droplets are substances containing (C=O)-group compounds, while crystalline solids are mainly carboxylic acids. Carboxyl groups are formed in cellulose chains. Surface products are mainly generated from the oxidation reactions of decomposition products under the effect of PD.
严家明, 廖瑞金, 杨丽君, 郝建, 孙才新. 油浸绝缘纸局部放电损伤产物分析[J]. 电工技术学报, 2011, 26(5): 184-191.
Yan Jiaming, Liao Ruijin, Yang Lijun, Hao Jian, Sun Caixin. Analysis of Damage Products of Oil-Impregnated Insulation Paper Caused by Partial Discharge. Transactions of China Electrotechnical Society, 2011, 26(5): 184-191.
[1] Bartnikas R. Partial discharges-their mechanism, detection and measurement[J]. IEEE Transactions Dielectrics and Electrical Insulation, 2002, 9(5): 763- 808. [2] 郝艳捧, 谢恒堃. 红外光谱法研究运行23年大电机定子绝缘中环氧的老化机理[J]. 电工技术学报, 2008, 23(3): 19-23. [3] Hudon C, Bartnikas R, Wertheimer M R. Effect of physico-chemical degradation of epoxy resin on partial discharge behavior[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 1995, 2(6): 1083-1094. [4] Hudon C, Bartnikas R, Wertheimer M R. Spark-to- glow discharge transition due to increased surface conductivity on epoxy resin specimens[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 1993, 28(1): 1-8. [5] Bozzo R, Gemme C, Guastavion F, et al. Aging diagnosis of insulation systems by PD measurements extraction of partial discharge features in electrical treeing[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 1998, 5(1): 118-124. [6] Kai W, Suzuoki Y, Mizutani T, et al. Model for partial discharges associated with treeing breakdown[J]. Journal of Physics D: Applied Physics, 2000, 33(10): 1197-1218. [7] 吴锴, 铃置保雄, 水谷昭吉, 等. 电树枝生长过程中的放电熄灭现象[J]. 自然科学进展, 1999, 9(12): 1373-1378. [8] Kim C S, Kondo T, Mizutani T. Change in PD pattern with aging[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2004, 11(1): 13-18. [9] Sekii Y, Yamauchi K. Analysis of deterioration by partial discharge of XLPE using GCMS and FTIR[C]. Proceedings of 2008 International Conference on Condition Monitoring and Diagnosis, Beijing, China, 2008. [10] Mizutani K, Kondo T. PD patterns and PD current shapes of a void in LDPE[C]. Proceedings of the 6th International Conference on Properties and Applications of Dielectric Materials, Xi’an, China, 2000. [11] Emsley A M. Kinetics and mechanisms of degradation of cellulosic insulation in power transformers[J]. Polymer Degradation and Stability, 1994, 44(3): 343-349. [12] Linhjell D, Lundgaard L, Gafvert U. Dielectric response of mineral oil impregnated cellulose and the impact of aging[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2007, 14(1): 156-169. [13] 廖瑞金, 冯运, 杨丽君, 等. 油纸绝缘老化特征产物生成速率研究[J]. 中国电机工程学报, 2008, 28(10): 142-147. [14] Saha T K. Review of modern diagnostic techniques for assessing insulation condition in aged trans- formers[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2003, 10(5): 903-917. [15] Verma P, Roy M, Verma A, et al. Assessment of degradation of transformer insulation paper by SEM and X-RD techniques[C]. Proceedings of the 2004 IEEE International Conference on Solid Dielectrics, Toulouse, France, 2004. [16] Verma P, Roy M, Verma A, et al. Assessment of degradation of transformer insulation paper by structural analysis[J]. Journal of Polymer Materials, 2004, 21(4): 361-369. [17] Cavallini A, Montanari G C, Ciani F. Analysis of partial discharge phenomena in paper-oil insulation systems as a basis for risk assessment evaluation[C]. 2005 IEEE International Conference on Dielectric Liquids, Coimbra, Portugal, 2005. [18] 王晓蓉, 胡龙龙, 张冠军, 等. 局部放电对绝缘纸性能的影响[J]. 高电压技术, 2001, 27(2): 9-10. [19] 毛一之, 王秀春. 超高压变压器绝缘结构中的树枝状放电[J]. 电工技术学报, 1999, 14(5): 40-43. [20] Del Casale M D, Schifani R, Holboll J T. Partial discharge tests using CIGRE method II[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2000, 7(1): 133-140. [21] Kako Y, Watanabe S, Higashimura Y. A new test method for internal partial discharge resistance of insulating materials[J]. Electrical Engineering in Japan Electrical Engineering in Japan, 1992, 112(5): 17-25. [22] 柯扬船, 何平笙. 高分子物理教程[M]. 北京: 化学工业出版社, 2006. [23] Bergenstrahle M, Berglund L A, Mazeau K. Thermal response in crystalline I beta cellulose: a molecular dynamics study[J]. Journal of Physical Chemistry B, 2007, 111(30): 9138-9145. [24] Schwanninger M, Rodrigues J C, Pereira H, et al. Effects of short-time vibratory ball milling on the shape of FT-IR spectra of wood and cellulose[J]. Vibrational Spectroscopy, 2004, 36(1): 23-40. [25] Kacurakova M, Smith A C, Gidley M J, et al. Molecular interactions in bacterial cellulose composites studied by 1D FT-IR and dynamic 2D FT-IR spectroscopy[J]. Carbohydrate Research, 2002, 337(12): 1145-1153. [26] 黄惠忠. 论表面分析及其在材料研究中的应用[M]. 北京: 科学技术文献出版社, 2002. [27] Beamson G, Briggs D. High resolution XPS of organic polymers[M]. New York: John Wiley & Sons, 1992. [28] 陈平, 唐传林. 高聚物的结构与性能[M]. 北京: 化学工业出版社, 2005. [29] Briggs D, Kendall C R, Blythe A R, et al. Electrical discharge treatment of polypropylene film[J]. Polymer, 1983, 24(1): 47-52. [30] Strobel M, Dunatov C, Strobel J, et al. Low- molecular-weight materials on corona-treated poly- propylene[J]. Journal of Adhesion Science and Technology, 1989, 3(1): 321-335.
2011, Vol. 26 
