The Range Recognition of Moisture and Aging Status of Oil-Paper Insulation Based on Frequency Domain Dielectric Response Characteristic Fingerprint
Yang Lijun1, Peng Pan1, Gao Jun1, Liu Xiao2
1. State Key Laboratory of Power Transmission Equipment and System Security and New Technology Chongqing University Chongqing 400044 China; 2. State Grid Changsha Power Supply Company Changsha 510000 China
Abstract：Frequency domain spectroscopy (FDS) technology has received widespread attention and become the research hot spot in recent years as a kind of nondestructive test and insulation diagnosis method, especially the assessment of the moisture status of transformer solid insulation has made significant progress. As the two important factors influencing the transformer insulation performance,moisture and aging status present similar effect on the frequency domain dielectric response of oil-paper insulation. In the present study, it is unable to separate the moisture and aging status or effective assess the aging status of transformer with FDS method. The oil-paper insulation state was divided to several state patterns according to different moisture and aging status and a fuzzy pattern recognition method was proposed in this paper, the inputs of the classifier were the dielectric response characteristic fingerprint, and the standard state pattern corresponding to the pattern recognition results was regarded as the assessment moisture and aging status of oil-paper insulation. Thirty standard state patterns were divided according to the degree polarization and moisture content of laboratory oil-paper insulation samples in this paper, the serial integrals of dielectric loss spectroscopy in three frequency bands were selected as the dielectric response characteristic fingerprints and the state pattern was classified based on close-degree. The analysis of laboratory oilpaper samples and field transformer FDS results preliminarily proves the validity of the proposed method in this paper.
杨丽君, 彭攀, 高竣, 刘骁. 基于频域介电响应特征指纹的油纸绝缘受潮及老化状态区间识别[J]. 电工技术学报, 2018, 33(9): 2105-2114.
Yang Lijun, Peng Pan, Gao Jun, Liu Xiao. The Range Recognition of Moisture and Aging Status of Oil-Paper Insulation Based on Frequency Domain Dielectric Response Characteristic Fingerprint. Transactions of China Electrotechnical Society, 2018, 33(9): 2105-2114.
[1] 杨丽君. 变压器油纸绝缘老化特征量与寿命评估方法研究[D]. 重庆:重庆大学, 2009. [2] Saha T K.Review of modern diagnostic techniques for assessing insulation condition in aged transformers[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2003, 10(5): 903-917. [3] Saha T K, Purkait P.Investigations of temperature effects on the dielectric response measurements of transformer oil-paper insulation system[J]. IEEE Transactions on Power Delivery, 2008, 23(1): 252-260. [4] Saha T K.Review of time-domain polarization measurements for assessing insulation condition in aged transformers[J]. IEEE Transactions on Power Delivery, 2003, 18(4): 1293-1301. [5] 高竣, 廖瑞金, 王有元, 等. 基于扩展Debye模型的变压器油纸绝缘老化特征量研究[J]. 电工技术学报, 2016, 31(4): 211-217. Gao Jun, Liao Ruijin, Wang Youyuan, et al.Ageing characteristic quantities of oil-paper insulation for transformers based on extended debye model[J]. Transactions of China Electrotechnical Society, 2016, 31(4): 211-217. [6] Fofana I, Hemmatjou H, Meghnefi F, et al.On the frequency domain dielectric response of oil-paper insulation at low temperature[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2010, 17(3): 799-807. [7] 廖瑞金, 刘捷丰, 吕彦冬, 等. 变压器油纸绝缘含水量定量评估的频域介电特征参量研究[J]. 电工技术学报, 2015, 30(1): 204-211. Liao Ruijin, Liu Jiefeng, Lü Yandong, et al.Frequency domain dieletric characteristic parameters for quantitative assessment of moisture content of oil-paper insulation in power transformers[J]. Transactions of China Electrotechnical Society, 2015, 30(1): 204-211. [8] 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. [9] Lundgaard L E, Linhjell D, Hestad O L.High frequency dielectric response of paper/oil insulation[C]//IEEE International Conference on Dielectric Liquids, Poitiers, France, 2008: 1-4. [10] 杨丽君, 齐超亮, 吕彦东, 等. 变压器油纸绝缘状态的频域介电谱特征参量及评估方法[J]. 电工技术学报, 2015, 30(1): 212-219. Yang Lijun, Qi Chaoliang, Lü Yandong, et al.Characteristic parameters and assessment methods of frequency-domain dielectric spectroscopy of oil-paper insulation for transformers[J]. Transactions of China Electrotechnical Society, 2015, 30(1): 212-219. [11] Gielniak J, Graczkowski A, Gubanski S, et al.Influence of thermal ageing on dielectric response of oil-paper insulation[J]. Materials Science-Poland, 2009, 27(4/2): 1199-1205. [12] Fofana I, Bouacha A, Farzaneh M.Characterization of aging transformer oil-pressboard insulation using some modern diagnostic techniques[J]. European Transactions on Electrical Power, 2011, 21(1): 1110-1127. [13] 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. [14] Jadav R B, Ekanayake C, Saha T K.Understanding the impact of moisture and ageing of transformer insulation on frequency domain spectroscopy[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2014, 21(1): 369-379. [15] Koch M, Raetzke S, Krueger M.Moisture diagnostics of power transformers by a fast and reliable dielectric response method[C]//2010 IEEE International Symposium on Electrical Insulation, San Diego, CA, United States, 2010: 1-5. [16] 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. [17] Liao Ruijin, Liu Jiefeng, Yang Lijun, et al.Quantitative analysis of insulation condition of oil-paper insulation based on frequency domain spectroscopy[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2015, 22(1): 322-334. [18] 陈振华, 余永权, 张瑞. 模糊模式识别的几种基本模型研究[J]. 计算机技术与发展, 2010, 20(9): 32-35. Chen Zhenhua, Yu Yongquan, Zhang Rui.Research on several models of fuzzy pattern recognition problems[J]. Computer Technology and Development, 2010, 20(9): 32-35. [19] 文华, 马志钦, 王耀龙, 等. 变压器油纸绝缘频域介电谱特性的XY模型仿真及试验研究[J]. 高电压技术, 2012, 38(8): 1956-1964. Wen Hua, Ma Zhiqin, Wang Yaolong, et al.Experimental investigation and XY model simulation on the frequency domain spectroscopy characteristics of transformer oil-paper insulation[J]. High Voltage Engineering, 2012, 38(8): 1956-1964. [20] Liao Ruijin, Hao Jian, Chen G, et al.Quantitative analysis of ageing condition of oil-paper insulation by frequency domain spectroscopy[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2012, 19(3): 821-830.
2018, Vol. 33 
