Using electromagnetic time reversal to locate faults in transmission lines: Definition and application of the “Mirrored Minimum Energy” property
Using electromagnetic time reversal to locate faults in transmission lines: Definition and application of the “Mirrored Minimum Energy” property
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DOI：
10.1109/emceurope.2017.8094641
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发表时间：
2017-09
期刊：
影响因子：
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通讯作者：
Zhaoyang Wang;A. Codino;R. Razzaghi;Mario Pacione;F. Rachidi
中科院分区：
文献类型：
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作者：
Zhaoyang Wang;A. Codino;R. Razzaghi;Mario Pacione;F. Rachidi
介绍了电磁时间反转法(EMTR)在单导体输电线路换介质故障定位中的应用。结果表明，时间反向量表现出一种称为镜像最小能量的性质，该性质允许沿线路识别故障位置。具体地说，只需一次仿真运行，就可以通过分析沿修正传播介质的电压信号的能量来确定故障位置。因此，传统的基于EMTR的故障测距技术的效率得到了显著提高。利用传输线方程将观测到的特性引入频域，并通过数值模拟和缩尺实验进一步验证。
This paper presents an application of the Electro-magnetic Time Reversal (EMTR) in changing media to identify the fault location along a single-conductor transmission line. It is shown that the time-reversed quantities exhibit a property, called Mirrored Minimum Energy, that permits the identification of the fault location along the line. Specifically, the fault location can be determined by analyzing the energy of voltage signal along the modified propagation medium with only one simulation run. As a consequence, the efficiency of the conventional EMTR-based fault location techniques is significantly improved. The observed property is introduced in the frequency domain by taking advantage of the transmission-line equations, and further validated by means of numerical simulations and a reduced-scale experiment.