| 基于反向行波的故障测距 |
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| 引用本文： | 刘巍,湛大千.基于反向行波的故障测距[J].电力系统及其自动化学报,2006,18(5):62-65. |
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| 作者姓名： | 刘巍 湛大千 |
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| 作者单位： | 武汉大学电气工程学院,武汉,430072 |
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| 摘 要： | 提出了基于反向行波单端故障测距的方法。理论上求证出小尺度下小波模极大值在各类母线下都能反映反射波的波头,并且推导出通过判断第二次出现的行波与初始反向行波模极大值极性的异同,可以确定第二次出现行波的性质,从而得出故障距离。利用M atlab对一条500 kV输电线路发生单相接地时进行故障定位仿真,结果证明了该方法的正确性。
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| 关 键 词： | 输电线路 母线 模极大值 反向行波 |
| 文章编号： | 1003-8930（2006）05-0062-04 |
| 收稿时间： | 2005-09-16 |
| 修稿时间： | 2006-01-16 |
Fault Location Method Based on Backward Travelling Wave |
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| LIU Wei,ZHAN Da-qian.Fault Location Method Based on Backward Travelling Wave[J].Proceedings of the CSU-EPSA,2006,18(5):62-65. |
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| Authors: | LIU Wei ZHAN Da-qian |
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| Affiliation: | School of Electrical Engineering, Wuhan University, Wuhan 430072, China |
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| Abstract: | A scheme of single end fault location is presented using the information of return wave extracted by wavelet transform.It is proved in theory that the maximal modulus of wavelet in small scale can reflect wave-head of return wave for all kinds of bus-bars.Then the fault location is determined by comparing the maximal modulus of the second backward travelling wave and the previous one.Simulation to the single-phase grounding fault of a 500kV transmission line verifies the correctness of the proposed method. |
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| Keywords: | transmission line bus-bar modulus maximum backward travelling wave |
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