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| Aging Influence of Oil Replacement Cycle in Transformer Oil-Paper Insulation |
| Zhang Mingze1, Liu Ji1, Lü Jialu1, Chen Qingguo1, Jia Haifeng2, Chen Xin3 |
1. Key Laboratory of Engineering Dielectrics and Its Application Ministry of Education Harbin University of Science and Technology Harbin 150080 China;
2. State Key Laboratory Breeding Base of Dielectrics Engineering Harbin University of Science and Technology Harbin 150080 China;
3. Heilongjiang Electric Power Research Institute Harbin 150090 China |
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Abstract Oil-paper insulation is the main insulation of oil-immersed transformer. To study the effects of different oil replacement cycles on the aging state of transformer oil-paper insulation, the XY equivalent models of transformers were prepared under laboratory conditions, and the accelerated aging tests were carried out under different oil replacement cycles. Meanwhile, the dielectric responses in frequency domain were tested at different aging days, as well as the moisture, acid value and polymerization degree of oil-paper insulation. According to the comparative experimental results, it is found that, the longer the oil replacement cycle, the more obvious the turning point in the curve, and the turning point of the curve moves to the high frequency with the increase of temperature. The longer the oil replacement cycle, the more obvious the decline of dielectric loss factor before and after oil replacement. With the increase of test temperature, the coincidence degree in the high frequency range before and after the oil replacement is greater. The activation energy of oil-immersed pressboard by translating the dielectric loss factor curve in different frequency ranges before and after oil replacement is basically the same. Consequently, this paper studies the influence of different oil replacement cycles on the aging of transformer oil-paper insulation. A method for calculating activation energy of insulating paper in oil paper insulation before and after oil replacement is proposed, which establishes the theoretical basis for the quantitative characterization of oil replacement cycle, aging temperature and oil-paper insulation life of transformer in the follow-up study.
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Received: 13 September 2018
Published: 28 November 2019
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[1] 杜林, 冉鹂蔓, 蔚超, 等. 基于扩展德拜模型的油纸绝缘受潮频域特征量研究[J]. 电工技术学报, 2018, 33(13): 3051-3058.
Du Lin, Ran Liman, Wei Chao, et al.Study on frequency domain characteristics of moisture in oil- paper insulation based on extended Debye model[J]. Transactions of China Electrotechnical Society, 2018, 33(13): 3051-3058.
[2] 杨丽君, 孙伟栋, 李金忠, 等. 变压器油纸绝缘绕组过载条件下的热老化试验方法研究[J]. 电工技术学报, 2018, 33(3): 609-617.
Yang Lijun, Sun Weidong, Li Jinzhong, et al.Investigation of thermal aging test method for transformer oil-paper insulation under over-load condition[J]. Transactions of China Electrotechnical Society, 2018, 33(13): 3051-3058.
[3] 张明泽, 刘骥, 齐鹏帅, 等. 基于介电响应技术的变压器油纸绝缘含水率数值评估方法[J]. 电工技术学报, 2018, 33(18): 4397-4407.
Zhang Mingze, Liu Ji, Qi Pengshuai, et al.Numerical evaluation method for moisture content of trans- former oil-paper insulation based on dielectric response technique[J]. Transactions of China Electro- technical Society, 2018, 33(18): 4397-4407.
[4] 黎成林, 曹保江, 孙健翔, 等. 基于FDS的变压器油浸纸老化程度与水分含量评估方法[J]. 电力自动化设备, 2017, 37(1): 217-223.
Li Chenglin, Cao Baojiang, Sun Jianxiang, et al.FDS-based assessment of aging degree and moisture content for oil-paper in transformer[J]. Electric Power Automation Equipment, 2017, 37(1): 217-223.
[5] 杨丽君, 齐超亮, 吕彦冬, 等. 热老化时间及测试温度对油纸绝缘时域介电特性的影响[J]. 中国电机工程学报, 2013, 33(31): 162-169.
Yang Lijun, Qi Chaoliang, Lü Yandong, et al.Study on influences of thermal aging time and testing tem- peratures on time-domain dielectric characteristics of oil-paper insulation[J]. Proceedings of the CSEE, 2013, 33(31): 162-169.
[6] 刘捷丰, 廖瑞金, 吕彦冬, 等. 电力变压器油纸绝缘含水量定量评估的时域介电特征量[J]. 电工技术学报, 2015, 30(2): 196-202.
Liu Jiefeng, Liao Ruijin, Lü Yandong, et al.Time domain dielectric characteristics for quantitative assessment of moisture content in transformer oil-paper insulation[J]. Transactions of China Electrotechnical Society, 2015, 30(2): 196-202.
[7] Saha T K, Purkait P.Investigation of polarization and depolarization current measurements for the assessment of oil-paper insulation of aged transformers[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2004, 11(1): 144-154.
[8] 马志钦, 廖瑞金, 郝建, 等. 温度对油纸绝缘极化去极化电流的影响[J]. 电工技术学报, 2014, 29(4): 290-297.
Ma Zhiqin, Liao Ruijin, Hao Jian, et al.Influence of temperature on polarization current of oil-paper insulation[J]. Transactions of China Electrotechnical Society, 2014, 29(4): 290-297.
[9] Saha T K, Purkait P.Effects of temperature on time-domain dielectric diagnostics of transformers[J]. Australian Journal of Electrical and Electronics Engineering, 2004, 1(3): 157-162.
[10] 周利军, 李先浪, 王晓剑, 等. 基于回复电压曲线的油纸绝缘状态评估[J]. 高电压技术, 2014, 40(2): 489-496.
Zhou Lijun, Li Xianlang, Wang Xiaojian, et al.Status assessment of oil-paper insulation based on recovery voltage method[J]. High Voltage Engineering, 2014, 40(2): 489-496.
[11] 蔡金锭, 刘永清, 蔡嘉, 等. 油纸绝缘变压器极化等效电路分析及其老化评估[J]. 电工技术学报, 2016, 31(15): 205-212.
Cai Jinding, Liu Yongqing, Cai Jia, et al.Analysis of equivalent circuit of oil-paper insulation transformer relaxation response and aging evaluation[J]. Transa- ctions of China Electrotechnical Society, 2016, 31(15): 205-212.
[12] 王东阳, 周利军, 朱少波, 等. 不同温度油隙频域介电谱的归算方法[J]. 中国电机工程学报, 2016, 36(23): 6583-6592.
Wang Dongyang, Zhou Lijun, Zhu Shaobo, et al.Calculation method of dielectric spectrum in frequency domain of oil gap at different tem- peratures[J]. Proceedings of the CSEE, 2016, 36(23): 6583-6592.
[13] 廖瑞金, 刘捷丰, 吕彦东, 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.Study on frequency domain dielectric characteristic parameters for quantitative evaluation of moisture content in transformer oil paper insulation[J]. Transactions of China Electrotechnical Society, 2015, 30(1): 204-211.
[14] 廖瑞金, 郝建, 杨丽君, 等. 变压器油纸绝缘频域介电谱特性的仿真与实验研究[J]. 中国电机工程学报, 2010, 30(22): 113-119.
Liao Ruijin, Hao Jian, Yang Lijun, et al.Simulation and experimental study on frequency-domain dielectric spectroscopy of oil-paper insulation for trans- formers[J]. Proceedings of the CSEE, 2010, 30(22): 113-119.
[15] 王世强, 魏建林, 张冠军, 等. 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, et al.Effect of temperature on dielectric response characteristics of oil impregnated pressboard[J]. Transactions of China Electrotechnical Society, 2012, 27(5): 50-55.
[16] Wang Shiqiang, Zhang Guanjun, Wei Jianlin, et al.Investigation of dielectric response characteristics of thermal aged insulating pressboard in vacuum and oil-impregnated ambient[J]. IEEE Transactions on Magnetics, 2010, 17(6): 1853-1862.
[17] 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.
[18] 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.
[19] Liao Ruijin, Liu Jiefeng, Yang Lijun, et al.Understanding and analysis on frequency dielectric parameter for quantitative diagnosis of moisture content in paper-oil insulation system[J]. IET Electric Power Applications, 2015, 9(3): 213-222.
[20] Zhang Mingze, Liu Ji, Qi Pengshuai, et al.Measurement of dielectric response of transformer moisture content[J]. IET Science, Measurement & Technology, 2018, 12(5): 594-602.
[21] 杨丽君, 彭攀, 高竣, 等. 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, et al.The range recognition of moisture and aging status of oil-paper insulation based on frequency domain dielectric response characteristic fingerprint[J]. Transactions of China Electrotechnical Society, 2018, 33(9): 2105-2114.
[22] Ding H Z, Wang Z D.On the degradation evolution equations of cellulose[J]. Cellulose, 2008, 15(2); 225-228.
[23] 杨丽君, 邓邦飞, 廖瑞金, 等. 应用时-温-水分叠加方法改进油纸绝缘热老化寿命模型[J]. 电工技术学报, 2011, 31(31): 196-203.
Yang Lijun, Deng Bangfei, Liao Ruijin, et al.Improvement of lifetime model on thermal aging of oil-paper insulation by time-temperature-moisture superposition method[J]. Transactions of China Electrotechnical Society, 2011, 31(31): 196-203.
[24] 廖瑞金, 孙会刚, 巩晶, 等. 变压器油纸绝缘老化动力学模型及寿命预测[J]. 高电压技术, 2011, 37(7), 1576-1583.
Liao Ruijin, Sun Huigang, Gong Jing, et al.Application of kinetics of chemical reaction in aging lifetime evaluation of oil-paper insulated transfor- mers[J]. High Voltage Engineering, 2011, 37(7): 1576-1583.
[25] 田杰, 段绍辉, 许昊, 等. 温度及老化状态对油纸绝缘时域介电响应特性影响的实验研究[J]. 中国电机工程学报, 2012, 32(增刊): 69-75.
Ian Jie, Duan Shaohui, Xu Hao, et al.Experimental research on effects of temperature and aging state on time domain dielectric response characteristics of oil-impregnated press-board insulation[J]. Pro- ceedings of the CSEE, 2012, 32(S): 69-75.
[26] 吴广宁, 宋臻杰, 杨飞豹, 等. 基于时域介电谱和去极化电量的变压器油纸绝缘老化特征量研究[J]. 高电压技术, 2017, 43(1): 195-202.
Wu Guangning, Song Zhenjie, Yang Feibao, et al.Study on aging characteristics of transformer oil- paper insulation based on the time domain dielectric spectroscopy and depolarization charge quantity[J]. High Voltage Engineering, 2017, 43(1): 195-202.
[27] 唐盼, 尹毅, 吴建东, 等. 基于去极化电流法的变压器油纸绝缘状态[J]. 电工电能新技术, 2012, 31(4): 39-47.
Tang Pan, Yin Yi, Wu Jiandong, et al.Study of oil-paper insulated transformers’aging state based on depolarization current measurements[J]. Advanced Technology of Electrical Engineering and Energy, 2012, 31(4): 39-47.
[28] 林元棣, 廖瑞金, 张镱议, 等. 换油对变压器油中糠醛含量和绝缘纸老化评估的影响及修正[J]. 电工技术学报, 2017, 32(13): 255-263.
Lin Yuandi, Liao Ruijin, Zhang Yiyi, et al.Effects and corrections of oil replacement upon furfural content in insulating oil and aging assessment of insulation paper of power transformers[J]. Transa- ctions of China Electrotechnical Society, 2017, 32(13): 255-263.
[29] Liao Ruijin, Lin Yuandi, Guo Pei, et al.The effects of insulating oil replacement upon power transformer condition assessment[J]. Electric Power Components and Systems, 2015, 43(17): 1971-1979.
[30] Manoj M, Ramu T S.Moisture aided degradation of oil impregnated paper insulation in power trans- formers[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2014, 21(1): 186-193.
[31] Koch M, Prevost T, Analysis of dielectric response measurements for condition assessment of oil-paper transformer insulation[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2012, 19(6): 1908-1915.
[32] Koch M, Krueger M.On-site methods for reliable moisture determination in power transformers[C]// IEEE Transmission & Distribution Conference & Exposition, New Orleans, LA, USA, 2010, DOI: 10.1109/TDC.2010.5484227. |
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2019, Vol. 34 
