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电网技术  2014 

特高频电磁波在变压器放油管道内的传播规律

DOI: 10.13335/j.1000-3673.pst.2014.03.042, PP. 817-822

Keywords: 变压器,局部放电,带电检测,特高频,放油阀

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Abstract:

放油阀式特高频(ultra-high-frequency,UHF)检测方法适用于变压器内部局部放电故障的带电检测。UHF检测装置的工作频带和安装位置是影响其检测灵敏度的关键因素。依据圆波导理论分析了UHF电磁波在放油管道内的传播特性,通过电磁波仿真和实验测试分析了UHF电磁波在放油管道内传播时的衰减程度,探究了衰减机理。研究结果表明,UHF电磁波进入放油管道传播时,低于TE11波截止频率的成分衰减严重,等于或大于此频率的成分几乎不衰减。提出了提高放油阀式UHF检测系统灵敏度的方法,即传感器的探入位置应尽量靠近变压器内壁;UHF检测系统的频率下限应不低于主模截止频率。此研究成果对于提高变压器局部放电带电检测技术具有重要价值。

References

[1]  Pryor B M.A review of partial discharge monitoring in gas insulated substations[C]// IEE Colloquium on Patial Discharges in Gas Insulated Substations.London, 1994:1-2.
[2]  张鸣超, 王建生, 邱毓昌.GIS中局部放电测量用超高频传感器[J].电网技术, 1998, 22(8):42-44.Zhang Mingchao, Wang Jiansheng, Qiu Liuchang.UHF sensors for partial discharge measurement in GIS [J].Power System Technology, 1998, 22(8):42-44(in Chinese).
[3]  钱勇, 黄成军, 江秀臣.基于超高频法的GIS局部放电在线监测研究现状及展望[J].电网技术, 2005, 29(1):40-43.Qian Yong, Huang Chengjun, Jiang Xiuchen.Present situation and prospect of ultra-high-frequency method based research of on-line monitoring of partial discharge in gas insulated switchgear in gas insulated switchgear[J].Power System Technology, 2005, 29(1):40-43(in Chinese).
[4]  覃剑, 王昌长, 邵伟民.特高频在电力设备局部放电在线监测中的应用[J].电网技术, 1997, 21(6):33-36.
[5]  卢启付, 郑书生, 李兴旺, 等.GIS 金属法兰孔特高频信号传播特性研究与外置式发射天线开发[J].电网技术, 2013, 37(8):2303-2309.Lu Qifu, Zheng Shusheng, Li Xingwang, et al.Study on propagation characteristics of UHF signal via hole of GIS mental flange and development of external radiating antenna[J].Power System Technology, 2013, 37(8):2303-2309(in Chinese).
[6]  Boeck W.Sensitivity verification for the UHF method and the acoustic method[J].Electra, 1999(183):1-6.
[7]  Gulski E.Guidelines for unconventional partial discharge measurements[R].CIGRE Technical Brochure, 2010.
[8]  Judd M D, Yang L, Ian B B.Hunter:partial discharge monitoring for power transformers using UHF sensors Part 1:sensors and signal interpretation[J].IEEE Electrical Insulation Magazine, 2005, 21(2):5-14.
[9]  李剑, 王小维, 金卓睿.变压器局部放电超高频信号多尺度网格维数的提取与识别[J].电网技术, 2010, 34(2):159-163.Li Jian, Wang Xiaowei, Jin Zhuorui.Multi-scale grid dimension extraction and recognition of ultra-high frequency signals of transformer partial discharge [J].Power System Technology, 2010, 34(2):159-163(in Chinese).
[10]  Convey A , Judd M D.Measurement of propagation characteristics for UHF signals in transformer insulation materials[C]// 13th Int Symp on High Voltage Engineering, Netherlands:Delft University of Techonology.2003:1-4.
[11]  Shirdel N, Akbari A, Mirzaei H R, et al.Three-dimensional simulation of UHF signal propagation in transformer using FDTD method[C]// 2011 International Conference on Power Engineering, Energy and Electrical Drives.Torremolinos (Málaga).Spain:University of Málaga, Spain, 2011:1 - 6.
[12]  杨宪章, 邹林, 樊亚东.工程电磁场[M].北京:中国电力出版社, 2007:1.
[13]  唐志国, 李成榕, 黄兴泉, 等.基于辐射电磁波检测的电力变压器局部放电定位研究[J].中国电机工程学报, 2006, 26(3):96-101.Tang Zhiguo, Li Chengrong, Huang Xingquan, et al.Study of partial discharge location in power transformer based on the detection of electromagnetic waves[J].Proceedings of the CSEE, 2006, 26(3): 96-101(in Chinese).
[14]  李军浩, 司文荣, 杨景刚, 等.电力变压器局部放电特高频信号外部传播特性研究[J].西安交通大学学报, 2008, 42(6):718-722.Li Junhao, Si Wenrong, Yang Jinggang, et al.Propagation characteristic of partial discharge ultra high frequency signals outside transformer [J].Journal of Xi’An Jiaotong University, 2008, 42(6):718-722(in Chinese).
[15]  王彩雄, 唐志国, 常文治, 等.局部放电超高频检测抗干扰与多源放电信号分离方法[J].电网技术, 2012, 36(3):46-50.Wang Caixiong, Tang Zhiguo, Chang Wenzhi, et al.A method for anti-interference and multi-source discharge signal separation in ultra high-frequency partial discharge detection[J].Power System Technology, 2012, 36(3):46-50(in Chinese).
[16]  陆宇航, 杜伯学, 朱晓辉.基于匹配滤波法的超高频局部放电信号检测[J].电网技术, 2008, 32(17):84-89.Lu Yuhang, Du Boxue, Zhu Xiaohui.Ultra high-frequency partial discharge detection based on matched filter algorithm[J].Power System Technology, 2008, 32(17):84-89(in Chinese).
[17]  郑书生, 李成榕, 周冰.用于变压器局部放电定位的复数域牛顿迭代算法[J].高电压技术, 2010, 37(8):2017-2023.Zheng Shusheng, Li Chengrong, Zhou Bing.Using Newton’s method in complex field for locating partial discharge in transformers[J].High Voltage Engineering, 2010, 37(8):2017-2023(in Chinese).

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