基于小波包变换的电力电缆单相接地故障区段自动定位方法  

Automatic Positioning Method of Single-Phase Ground Fault Section of Power Cable Based on Wavelet Packet Transformation

作　　者：尹贻国[1] 王强[1] YIN Yiguo;WANG Qiang(Integrated Electronic Systems Lab Co.,Ltd.,Jinan,Shandong Province,250104 China)

机构地区：[1]积成电子股份有限公司,山东济南250104

出　　处：《科技资讯》2024年第20期155-157,共3页Science & Technology Information

摘　　要：在电力系统中,由于噪声影响,故障特征信息的提取可能不准确,影响定位精度。为此,研究基于小波包变换的电力电缆单相接地故障区段自动定位方法,通过高精度传感器采集电缆故障信号,利用小波包变换进行多尺度分解和重构,以提取时域特征,并基于这些特征建立选线判据来确定故障区段。实验证明,此方法在金属性和非金属性接地故障中均能实现精确定位,为电缆故障的快速、准确检测提供了有效手段。In the power system,due to the influence of noise,the extraction of fault feature information may be in⁃accurate,which affects the location accuracy.Therefore,an automatic positioning method of the single-phase ground fault section of power cables based on wavelet packet transformation is studied.It collects the cable fault sig⁃nal through high-precision sensor,and uses multi-scale decomposition and reconstruction through wavelet packet transformation to extract the time domain features.Based on these characteristics,line selection criteria are estab⁃lished to determine the fault section.Experimental results show that the method can accurately locate both metallic and nonmetallic ground faults,and provides an effective means for fast and accurate detection of cable faults.

关 键 词：小波包变换 电力电缆 单相接地故障 故障区段定位 

分 类 号：TM77[电气工程—电力系统及自动化]