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高压电器  2014 

基于改进三平台测向原理的变压器局放超声定位研究

, PP. 100-105

Keywords: 局部放电,三平台,超声定位,峰值平均值,辅助定位点,圆心

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Abstract:

由局放定位原理分析得出方位角和俯仰角误差会导致定位误差随着局放源与测向平台之间距离的增加而被放大,而局放源与测向平台之间的距离可根据实验室模拟变压器局放实验求得的超声信号峰值的平均值随局放源与测向平台之间距离的变化曲线求得,在此基础上提出一种基于改进三平台测向原理的变压器局放超声定位方法。利用3条测向线可以确定3个辅助定位点(即由误差放大原理在两两测向线公垂线上求得,其到测向线的距离与局放源到测向平台之间的距离成正比),根据统计学中取平均值可以在最大程度上减小随机误差对测量结果影响的原理,取3个辅助定位点确定的平面圆的圆心为局放源的位置。实验结果证实了文中所提方法可以提高局放源的定位成功率和精度,具有较大的实际应用价值。

References

[1]  PEDERSEN A,CRICHTON G C,MCALLISTER I W. The theory and measurement of partial discharge transients[J]. IEEE Transactions on Electrical Insulation,1991,26(3):487-497.
[2]  LI Y Q,CHEN Z Y,LU F C,et al. Wavelet packet analysis of ultrasonic signal of partial discharge in transformer[C]//Proceedings of International Conference on Electrical Engineering.Xi’an :Xian Jiaotong University Press,2001:1455-1459.
[3]  DREHER A,NIKLASCH N,KLEFENZ F,et al. Antenna and receiver system with digital beamforming for satellite navigation and communications[J]. IEEE Transactions on Microwave Theory and Techniques,2003,51(7):1815-1821.
[4]  LUO Yongfen,JI Shengchang,LI Yanming. Phased-ultrasonic receiving-planar array transducer for partial discharge location in transformer[J]. IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control,2006,53(3):614-622.
[5]  罗日成,李卫国,李成榕. 基于阵列信号处理的变压器内局部放电源多目标定位方法[J]. 电网技术,2006,30(1):65-69. LUO Richeng,LI Weiguo,LI Chengrong. A multi-target method to locate internal partial discharge sources within transformer based on array signal processing[J]. Power System Technology,2006,30(1):65-69.
[6]  黄剑伟,王昌明. 一种改进的测向交叉定位方法[J]. 航天电子对抗,2008,24(4):51-53. HUANG Jianwei,WANG Changming. An improved direction-finding cross-location method[J]. Aerospace Electronic Warfare,2008,24(4):51-53.
[7]  李志勇,温宗周. 变压器局部放电超声波监测系统设计与实现[J]. 西安工程大学学报,2010,24(1):71-75. LI Zhiyong,WEN Zongzhou. Design and realization of a new ultrasonic monitoring system on transformer partial discharge[J]. Journal of Xi’an Polytechnic University, 2010,24(1):71-75.
[8]  李 剑,王小维,金卓睿,等. 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,et al. Multi-scale grid dimension extraction and recognition of ultra-high frequency signals oftransformer partial discharge[J]. Power System Technology,2010,34(2):159-163.
[9]  JUDD M D,CLEARY G P,BENNOCH C J,et al. Power trans-former monitoring using UHF sensors:site trials[C]// Proceedings of the 2002 IEEE International Symposium on Electrical Insulation.Boston,MA USA:IEEE,2002:145-149.
[10]  LU Y,TAN X,HU X. PD detection and localisation by acoustic measurements in an oil-filled transformer[J]. IEEE Proceedings of Science,Measurement and Technology,2000,147(2):81-85.
[11]  李云阁,施 围,张祥全,等. 750 kV变压器现场局部放电试验有关问题分析[J]. 高压电器,2007,43(6):434-437. LI Yunge,SHI Wei,ZHANG Xiangquan,et al. Analysis of on-site partial-discharge test on 750 kV transformers[J]. High Voltage Apparatus,2007,43(6):434-437.
[12]  王永良,陈 辉,彭应宁,等. 空间谱估计理论与算法[M].北京:清华大学出版社,2004:82-139. WANG Yongliang,CHEN Hui,PENG Yingning,et al.Spatial spectrum estimation theory and algorithm[M]. Beijing:Tsinghua University Press,2004:82-139.
[13]  王少华,叶自强,梅冰笑. 输变电设备在线监测及带电检测技术在电网中的应用现状[J]. 高压电器,2011,47(4):84-90. WANG Shaohua,YE Ziqiang,MEI Bingxiao. Application status of online monitoring and live detection technologies of transmission and distribution equipment in electric network[J]. High Voltage Apparatus,2011,47(4):84-90.
[14]  徐 斌,王 晶,李彦明. 变压器中局部放电超高频信号传播的仿真研究[J]. 高压电器,2007,43(4):244-247. XU Bin,WANG Jing,LI Yanming. Emulational study on the propagation of UHF signal emitted by PD in transformers[J]. High Voltage Apparatus,2007,43(4):244-247.
[15]  王 颂,李香龙,李军浩,等. 变压器局部放电超高频信号外传播特性的试验研究[J]. 高压电器,2007,43(2):100-101. WANG Song,LI Xianglong,LI Junhao,et al. Experimental study for outside propagation characteristic of the UHF signal emitted by partial discharge in transformers[J]. High Voltage Apparatus,2007,43(2):100-101.
[16]  黄华平. 电力变压器局部放电的超声阵列定位算法研究[D]. 保定:华电力大学硕士论文,2011.
[17]  谢 庆. 基于空间谱估计的变压器局放超声阵列定位方法研究[D]. 保定:华北电力大学:北京,2010.
[18]  张丽君,谢 庆,李 菱,等. 基于测向线公垂线中点的局部放电相控超声几何定位算法研究[J]. 高压电器,2012,48(2):30-33. ZHANG Lijun,XIE Qing,LI Ling,et al. Research on algorithm for ultrasonic array geometric location of PD based on common perpendicular midpoint of direction finding lines[J]. High Voltage Apparatus,2012,48(2):30-33.
[19]  王国利,郝艳捧,李彦明. 电力变压器局部放电检测技术的现状和发展[J]. 电工电能新技术,2001,20(2):52-57. WANG Guoli,HAO Yanpeng,LI Yanming. Present and furute development of partial discharge detection in power transformers[J]. Advanced Technology of Electrical Engineering and Energy,2001,20(2):52-57.
[20]  薜林涛. 核电变压器局部放电故障分析[J]. 变压器,2014,51(1):57-59. XUE Lintao. Analysis of transformer PD fault in nuclear power station[J]. Tranformer,2014,51(1):57-59.
[21]  郝艳捧,王国利,谢恒?,等. 基于局部放电和超声波法研究大电机定子绝缘的老化特性[J]. 电工技术学报,2002,17(2):1-6. HAO Yanpeng,WANG Guoli,XIE Hengkun,et al. Study on aging characteristics of generator stator insulation based on partial discharge and ultrasonic wave method[J]. Transactions of China Electrotechnical Society,2002,17(2):1-6.

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