Assessment of the Influence of Losses on the Performance of the Electromagnetic Time Reversal Fault Location Method
Assessment of the Influence of Losses on the Performance of the Electromagnetic Time Reversal Fault Location Method
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DOI：
10.1109/tpwrd.2016.2615887
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发表时间：
2017-06
影响因子：
4.4
通讯作者：
R. Razzaghi;G. Lugrin;F. Rachidi;M. Paolone
中科院分区：
文献类型：
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作者：
R. Razzaghi;G. Lugrin;F. Rachidi;M. Paolone
电磁时间反转（EMTR）已被证明是定位交流和直流电网故障的有效方法。在现有的文献中，反向传播介质被认为具有与直接时间介质相同的损耗。然而，电报员的方程描述的行波传播是时间反演不变的，当且仅当反向损耗被认为是在反向传播阶段。分析了网损对基于EMTR的电网故障定位方法性能的影响。在这方面，三个反向传播模型提出，分析和比较。它示出了一个有损耗的反向传播模型，其中的波动方程是不严格的时间反演不变的，结果在准确的故障位置。最后，开发了基于有耗反向传播模型和快速电磁暂态仿真平台的EMTR故障测距系统，并对其性能进行了验证。
Electromagnetic time reversal (EMTR) has been shown to be an efficient method for locating faults in ac and dc power grids. In the available literature, the back-propagation medium has been considered to have identical losses as the direct-time medium. However, the telegrapher's equations describing the traveling wave propagation are time-reversal invariant if and only if inverted losses are considered in the back-propagation phase. This paper presents an analysis of the impact of losses on the performance of the EMTR-based fault location method for power networks. In this respect, three back-propagation models are proposed, analyzed, and compared. It is shown that a lossy back-propagation model, for which the wave equations are not rigorously time-reversal invariant, results in accurate fault locations. Finally, an EMTR fault location system based on the lossy back-propagation model and a fast electromagnetic transient simulation platform is developed and its performances validated.