Fault location using wavelets
Fault location using wavelets
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DOI：
10.1109/61.714808
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发表时间：
1998-10-01
影响因子：
4.4
通讯作者：
Abur, A
中科院分区：
文献类型：
--
作者：
Magnago, FH;Abur, A
本文介绍了利用小波变换分析电力系统故障暂态过程，以确定故障位置。行波理论用于捕获故障点和继电器之间沿被监测线路的瞬变沿着的传播时间。故障暂态的高频分量的时间分辨率由小波变换提供。该信息与已经分解成其模态分量的信号的传播时间有关。空中模式用于所有故障类型，而地面模式用于解决与某些特殊情况相关的问题。小波变换被发现是一个很好的判别识别行波反射故障的故障类型和阻抗无关。EMTP仿真结果验证了该方法的有效性。
This paper describes the use of wavelet transform for analyzing power system fault transients in order to determine the fault location. Traveling;wave theory is utilized in capturing the travel time of the transients along the monitored lines between the fault point and the relay. Time resolution for the high frequency components of the fault transients, is provided by the wavelet transform. This information is related to the travel time of the signals which are already decomposed into their modal components. Aerial mode is used for all fault types, whereas the ground mode is used to resolve problems associated with certain special cases. Wavelet transform is found to be an excellent discriminant for identifying the traveling wave reflections from the fault irrespective of the fault type and impedance. EMTP simulations are used to test and validate the proposed fault location approach for typical power system faults.