| 考虑输电线路阻抗频率特性的高精度行波定位方法 |
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| 引用本文： | 雷莉,曾祥君,刘建华,张小丽.考虑输电线路阻抗频率特性的高精度行波定位方法[J].长沙理工大学学报(自然科学版),2007,4(1):48-52. |
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| 作者姓名： | 雷莉 曾祥君 刘建华 张小丽 |
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| 作者单位： | 长沙理工大学,电气信息工程学院,湖南,长沙,410076 |
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| 基金项目： | 国家自然科学基金
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教育部新世纪优秀人才支持计划
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教育部霍英东教育基金会高等院校青年教师基金 |
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| 摘 要： | 从理论上推导出了考虑集肤效应的三相输电线路的正序阻抗和零序阻抗随频率变化的公式,分析了输电线路的阻抗频率特性及输电线路阻抗的依频特性对行波定位和保护的影响,并提出了应用小波包分析对行波信号进行分解,分频段进行行波速度的计算并记录行波波头到达的时间来进行故障定位的方法.通过ATP仿真分析表明,该故障定位方法能有效消除行波色散特性的影响,提高故障定位的精度.
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| 关 键 词： | 阻抗频率特性 输电线路 行波 ATP仿真 |
| 文章编号： | 1672-9331（2007）01-0048-05 |
| 修稿时间： | 2006-03-24 |
Fault location based on travelling wave for transmission line by considering the frequency impedance characteristics |
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| LEI Li,ZENG Xiang-jun,LIU Jian-hua,ZHANG Xiao-li.Fault location based on travelling wave for transmission line by considering the frequency impedance characteristics[J].Journal of Changsha University of Science and Technology:Natural Science,2007,4(1):48-52. |
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| Authors: | LEI Li ZENG Xiang-jun LIU Jian-hua ZHANG Xiao-li |
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| Institution: | College of Electrical and Information Engineering,Changsha University of Science and Technology,Changsha 410076,China |
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| Abstract: | The formula for the change of the positive-sequence and zero-sequence impedance of three phase transmission line with frequency are put forward by considering skin effect in this paper. The frequency characteristics of transmission line impedance and its impact on the traveling wave location are also analyzed in the paper. A wavelet packet in traveling wave signalis is used,a velocity in different bands is calculated and the arrival time of traveling wave to decide the fault location is recorded. ATP simulation results show that the method can reduce the effect of dispersion characteristics, improve the precision of fault location. |
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| Keywords: | frequency impedance characteristic transmission line travelling wave ATP simulation experiment |
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