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中国工业与应用数学学会会刊
主管：中华人民共和国教育部
主办：西安交通大学
ISSN 1005-3085  CN 61-1269/O1
工程数学学报

工程数学学报 ›› 2015, Vol. 32 ›› Issue (2): 197-204.doi: 10.3969/j.issn.1005-3085.2015.02.004

• • 上一篇    下一篇

电力电缆故障测距分析研究

李  敏   

  1. 黄冈职业技术学院，湖北 黄冈 438002
  • 收稿日期:2013-12-06 接受日期:2014-06-12 出版日期:2015-04-15 发布日期:2015-06-15

Analysis on the Electric Power Cable Fault Location

LI Min   

  1. Huanggang Polytechnic College, Huanggang, Hubei 438002
  • Received:2013-12-06 Accepted:2014-06-12 Online:2015-04-15 Published:2015-06-15

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摘要： 工程中常用脉冲电流法检测地下电缆的故障位置，由于地下电缆故障的复杂性和脉冲传递波速的衰减，实际测量时存在误差．本文介绍了应用脉冲电流法检测搭配小波变换多层分析，提高测量准确性的方法．应用Daubechies (db2) 小波对原始波形进行五层分解分析，可较好消除电缆的杂波、提高信号的识别率，减小误差，有效提升在线实时故障测距的准确性．

关键词: 脉冲电流法, 小波分析, 电力电缆, 测距

Abstract:

Pulse current method is applied to locate the fault of sub-way cables in practice, due to the complexity of the sub-way failures and the attenuation of transmit waves, a certain error exists. This paper introduces a method that combines the measurement with pulse current method and multiple-layer wavelet analysis, and the measurement accuracy is then approved. Daubechies (db2) wavelet analysis method is implemented with five-layer decomposition of raw waveforms, which could well eliminate the cable clutters, improve the signal recognition rate, reduce the measuring errors, and finally effectively improve the accuracy of online fault distance measurement.

Key words: pulse current method, wavelet analysis, power cable, distance measurement

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