温度对油纸绝缘介电响应特性的影响

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Abstract To investigate temperature effect on dielectric response measurement results of transformer oil-paper insulation, and for more accurate assessment of insulation condition and moisture content in pressboard, the time-domain return voltage (RV) and frequency domain spectroscopy (FDS) experiments are designed and performed on oil-impregnated pressboard at different temperatures. The variations of characteristic parameters of RV spectra and FDS curves of the dissipation factor tanδ, real capacitance C′and imaginary capacitance C″at different temperatures are compared. The changing trends and reason are analyzed. Temperature influences on evaluating moisture content and aging status with dielectric response measurements results are investigated. The results show that, with temperature increasing, the peak of RV spectrum curve shifts to shorter charging time, and peak values of both charging time and voltage decrease. tanδ, C″curves shift to higher frequency, while the minimum values of tand and C″increase slightly. C′increases, especially in lower frequency range. It is revealed that, temperature effect on test results should be considered for evaluating moisture content and aging condition of pressboard. Otherwise, it will lead to a wrong aging judgment for on-site transformer solid insulation.

Key words： Temperature oil-paper insulation dielectric response moisture content aging status

Received: 23 December 2009 Published: 20 March 2014

PACS:

TM855

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	Articles by authors
	Wang Shiqiang
	Wei Jianlin
	Zhang Guanjun
	Yang Shuangsuo
	Dong Ming
	Liu Xiaowei
	Huo Dawei

Cite this article:

Wang Shiqiang,Wei Jianlin,Zhang Guanjun等. Effect of Temperature on Dielectric Response Characteristics of Oil Impregnated Pressboard[J]. Transactions of China Electrotechnical Society, 2012, 27(5): 50-55.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2012/V27/I5/50

[1] Hassan O, Shyegani A A, Borsi H, Gockenbach, et al. Detection of oil-pressboard insulation aging with dielectric spectroscopy in time and frequency domain measurements[C]. IEEE International Conference on Solid Dielectrics, Toulouse, France, 2004, 2: 665-668.
[2] 杨丽君, 廖瑞金, 孙会刚, 等. 变压器油纸绝缘热老化特性及特征量研究[J]. 电工技术学报, 2009, 24(8): 27-33.
Yang Lijun, Liao Ruijin, Sun Huigang, et al. Investigation on properties and characteristics of oil-paper insulation in transformer during thermal degradation process[J]. Transactions of China Electrotechnical Society, 2009, 24(8): 27-33.
[3] 杨启平, 薛五德, 蓝之达. 变压器绝缘老化的诊断与寿命评估[J]. 变压器, 2004, 41(2): 13-17.
Yang Qiping, Xue Wude, Lan Zhida. Aging diagnosis and expected life assessment for transformer insulation[J]. Transformer, 2004, 41(2): 13-17.
[4] 操敦奎, 许维宗, 阮国方. 变压器运行维护与故障分析处理[M]. 北京: 中国电力出版社, 2008.
[5] Yew J H, Saha T K, Thomas A. Impact of temperature on the frequency domain dielectric spectroscopy for the diagnosis of power transformer insulation[C]. IEEE Power Engineering Society General Meeting, Montreal, Canada, 2006: 1-7.
[6] Zaengl W S. Dielectric spectroscopy in time and frequency domain for HV power equipment, part I: theoretical considerations[J]. IEEE Electrical Insulation Magazine, 2003, 19(5): 5-18.
[7] Gubanski S M, Boss P, Csepes G, et al. Dielectric response methods for diagnostics of power transformers[J]. IEEE Electrical Insulation Magazine, 2003, 19(3): 12-18.
[8] Ekanayake C, Gubanski S M, Graczkowski A, et al. Frequency response of oil impregnated pressboard and paper samples for estimating moisture in transformer insulation[J]. IEEE Transactions on Power Delivery, 2006, 21(3): 1309-1317.
[9] Yew J H, Pradhan M K, Saha T K. Effects of moisture and temperature on the frequency domain spectroscopy analysis of power transformer insulation[C]. IEEE Power and Energy Society General Meeting, Pittsburgh, USA, 2008: 1-8.
[10] Wang Shiqiang, Wei Jianlin, Yang Shuangsuo, et al. Temperature and thermal aging effects on the frequency domain spectroscopy measurement of oil-paper insulation[C]. The 9th International Conference on Properties and Applications of Dielectric Materials, Harbin, China, 2009: 329-332.
[11] Services G E. IDA 200-insulation diagnostic system user's manual[M].Taby, Sweden: Pax Diagnostics AB, 2006.
[12] Osvath P, Poell H. Polarization spectrum analysis for diagnosis of oil/paper insulation systems[C]. Nordic Insulation Symposium, Vaasa, Finland, 1994: 155-161.
[13] Gafvert U. Condition assessment of insulation systems- analysis of dielectric response methods[C]. Nordic Insulation Symposium, Bergen, Norway, 1996: 1-19.
[14] Kozlovskis A. Temperature dependence of return voltage characteristics[J]. IEEE Transactions on Power Delivery, 1999, 14(3): 705-708.
[15] Jonscher A K. Dielectric relaxation in solids[M]. London: Chelsea Dielectrics Press, 1983.
[16] 张良莹, 姚熹. 电介质物理[M]. 西安: 西安交通大学出版社, 1991.
[17] 金维芳. 电介质物理学[M]. 北京: 机械工业出版社, 1997.
[18] Zaengl W S. Applications of dielectric spectroscopy in time and frequency domain for HV power equipment[J]. IEEE Electrical Insulation Magazine, 2003, 19(6): 9-22.