基于行波时频矩阵分析的配电网单相接地故障定位方法

IF 1.6 4区 工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC Journal of Electrical Engineering & Technology Pub Date : 2024-09-09 DOI:10.1007/s42835-024-02037-w
Yuanchuan Wang, Zewen Li, Sitong Chen, Yiming Zhang
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引用次数: 0

摘要

本文提出了一种基于配电网络时频矩阵分析的定位方法。首先,对每条馈线末端检测设备测量到的行波(TW)信号进行解耦,得到故障行波的航模分量。然后,在主干线、一级支线和二级支线等特定位置预设故障,通过对测量到的 TW 信号进行连续小波变换 (CWT) 来构建时频矩阵,并建立矩阵比较库。通过比较故障发生时从各终端提取的矩阵与比较库中矩阵的相似度,确定故障发生的馈线和分支。最后,本文通过绘制时频矩阵中特定频段的能量演化频谱,计算出波头到达测量点的时间,并通过双端定位法实现故障在配电网络中的精确定位。
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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Location Method of Single-Phase to Ground Fault in Distribution Network Based on Time-Frequency Matrix Analysis of Traveling Wave

This paper proposes a location method based on the analysis of the time-frequency matrix for distribution networks. Firstly, the traveling wave (TW) signal measured by the detection device at the end of each feeder is decoupled to obtain the aerial-mode component of the fault TW. Then, faults are preset at particular locations, such as the main line, primary branch, and secondary branch to construct time-frequency matrices by applying continuous wavelet transform (CWT) to the measured TW signals, and a matrix comparison library is established. The feeder and branch where the fault occurs are determined by comparing the similarity between the matrix extracted from each terminal at the time of fault occurrence and the matrix in the comparison library. Finally, this paper calculates the time for the wave head to reach the measurement point by plotting the energy evolution spectrum of the specific frequency band in the time-frequency matrix, and the precise location of the fault in the distribution network is achieved through the double-ended location method.

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来源期刊
Journal of Electrical Engineering & Technology
Journal of Electrical Engineering & Technology ENGINEERING, ELECTRICAL & ELECTRONIC-
CiteScore
4.00
自引率
15.80%
发文量
321
审稿时长
3.8 months
期刊介绍: ournal of Electrical Engineering and Technology (JEET), which is the official publication of the Korean Institute of Electrical Engineers (KIEE) being published bimonthly, released the first issue in March 2006.The journal is open to submission from scholars and experts in the wide areas of electrical engineering technologies. The scope of the journal includes all issues in the field of Electrical Engineering and Technology. Included are techniques for electrical power engineering, electrical machinery and energy conversion systems, electrophysics and applications, information and controls.
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