Diagnosis of Multiple Impedance Mismatch Segments in Power Cables Based on Frequency Domain Reflection Method

2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2021-12-12 DOI:10.1109/CEIDP50766.2021.9705349

K. Zhou, Yating Cao, Pengfei Meng, S. Akram, Yu-xuan Jin, Tao Zhou, Jin Yang, Yuming Wu

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引用次数: 2

Abstract

Cross linked polyethylene (XLPE) cable has been widely used in urban power transmission and distribution system. The accurate location of cable partial defect is of great significance to maintain the safe operation of the cable. In this research, a method of cable partial defect diagnosis based on frequency domain reflectometry (FDR) is proposed. Firstly, the mathematical model of cable transmission line is established, and the basic principle of this method is described. Then, the Dolph-Chebyshev window function is selected to eliminate the inaccuracy of positioning results caused by signal spectrum leakage. And through the feasibility of this method is explored by establishing a simulation model. Finally, several experiments were carried out on 10kV XLPE cables in Chengdu. The results show that the diagnosis conclusions of cable intermediate joints and local defects location are basically consistent with the cable account information and the actual situation. Which indicate that the method is feasible for locating and diagnosing local defects and intermediate joints.

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基于频域反射法的电力电缆多阻抗失配段诊断

交联聚乙烯(XLPE)电缆已广泛应用于城市输配电系统中。电缆局部缺陷的准确定位对维护电缆的安全运行具有重要意义。本文提出了一种基于频域反射法的电缆局部缺陷诊断方法。首先，建立了电缆传输线的数学模型，阐述了该方法的基本原理。然后，选择dolphor - chebyshev窗函数，消除信号频谱泄漏导致的定位结果不准确。并通过建立仿真模型对该方法的可行性进行了探讨。最后，在成都10kV交联聚乙烯电缆上进行了多次试验。结果表明，电缆中间接头和局部缺陷定位的诊断结论与电缆账户信息和实际情况基本一致。结果表明，该方法对局部缺陷和中间接头的定位诊断是可行的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)

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