温度对油纸绝缘介电响应特性的影响

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (575 KB)
输出: BibTeX | EndNote (RIS)

摘要为了研究温度对变压器油纸绝缘介电响应测量结果的影响, 以更准确地评估纸板微水含量和老化状态, 设计了在不同温度下对变压器油浸绝缘纸板试品分别进行时域回复电压(RV)和频域谱(FDS)测量的实验, 比较不同温度下油纸绝缘RV极化谱特征参数以及介质损耗因数tanδ、复电容实部C′、虚部C″的频域谱曲线变化, 分析变化趋势及原因, 研究温度对介电响应方法评估绝缘纸板微水含量及其老化状态的影响。结果显示, 随着温度的升高, 试品RV极化谱曲线峰值向较短充电时间方向偏移, 峰值时间和峰值电压均减小;试品tanδ 和C″频域谱曲线向高频方向偏移, 最小值略微增大;C′变大, 在较低频率尤其明显。因此, 在用介电响应法评估纸板微水含量及老化状态必须考虑温度影响, 否则将导致评估结果失实。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	王世强
	魏建林
	张冠军
	杨双锁
	董明
	刘孝为
	霍大渭

关键词 ：温度, 油纸绝缘, 介电响应, 微水含量, 老化状态

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

收稿日期: 2009-12-23 出版日期: 2014-03-20

PACS:

TM855

基金资助:国家高技术研究发展计划(863计划)(2007AA04Z411), 国家重点基础研究发展计划(973计划)(2009CB724505-1)和输配电装备及系统安全与新技术国家重点实验室开放课题(2007DA10512709405)资助项目。

作者简介: 王世强男, 1984年生, 博士研究生, 研究方向为变压器老化状态检测与剩余寿命预测。魏建林男, 1980年生, 博士研究生, 从事变压器老化状态检测与剩余寿命预测。

引用本文:

王世强, 魏建林, 张冠军, 杨双锁, 董明, 刘孝为, 霍大渭. 温度对油纸绝缘介电响应特性的影响[J]. 电工技术学报, 2012, 27(5): 50-55. Wang Shiqiang, Wei Jianlin, Zhang Guanjun, Yang Shuangsuo, Dong Ming, Liu Xiaowei, Huo Dawei. Effect of Temperature on Dielectric Response Characteristics of Oil Impregnated Pressboard. Transactions of China Electrotechnical Society, 2012, 27(5): 50-55.

链接本文:

http://dgjsxb.ces-transaction.com/CN/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.