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arXiv 2002.06316eess.SP
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一种有效的基于EMTR的输电线路高阻故障测距方法

An Effective EMTR-Based High-Impedance Fault Location Method for Transmission Lines

Jianwei An, Chijie Zhuang, Farhad Rachidi, Rong Zeng

摘要:

本文综述了电磁时间反演(EMTR)故障测距技术,并进一步数值验证了其在故障阻抗可忽略时的有效性。此外,还推导了考虑故障阻抗的具体EMTR模型,并通过多种计算方法验证了模型推导的正确性。在此基础上,我们发现,当故障阻抗较大时,现有的EMTR方法可能无法准确定位故障。本文提出了一种EMTR方法,该方法通过同时注入双端信号来提高高阻故障的定位效果。理论计算表明,该方法可以实现高阻故障的精确测距。为了进一步说明该方法的有效性,与现有的EMTR方法和最常用的基于行波的方法使用小波变换进行了比较。仿真结果表明,双端EMTR方法能有效地定位高阻故障,且对同步误差的鲁棒性优于行波法。此外,该方法不需要未知故障阻抗的知识或先验猜测。

英文摘要:

This paper summarizes the electromagnetic time reversal (EMTR) technique for fault location, and further numerically validates its effectiveness when the fault impedance is negligible. In addition, a specific EMTR model considering the fault impedance is derived, and the correctness of the model derivation is verified by various calculation methods. Based on this, we found that when the fault impedance is large, the existing EMTR methods might fail to accurately locate the fault. We propose an EMTR method that improves the location effect of high-impedance faults by injecting double-ended signals simultaneously. Theoretical calculations show that this method can achieve accurate location for high-impedance faults. To further illustrate the effectiveness, the proposed method is compared with the existing EMTR methods and the most commonly used traveling wave-based method using wavelet transform. The simulation results show that the proposed double-ended EMTR method can effectively locate high-impedance faults, and it is more robust against synchronization errors compared to the traveling wave method. In addition, the proposed method does not require the knowledge or the a priori guess of the unknown fault impedance.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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