基于EEMD与小波阈值的配电线路单相接地故障诊断  

Diagnosis of Single-phase Grounding Faults in Distribution Lines Based on EEMD and Wavelet Threshold

作　　者：鲁一凡 钟睿丰 LU Yifan;ZHONG Ruifeng(State Grid Shaanxi Electric Power Co.,Ltd.,Xi′an Power Supply Company,Xi′an 710000,China)

机构地区：[1]国网陕西省电力有限公司西安供电公司,陕西西安710000

出　　处：《电工技术》2025年第2期216-218,221,共4页Electric Engineering

摘　　要：常规的配电线路单相接地故障诊断方法主要使用深度去噪自编码(Denoising Autoencoders, DAE)输出故障定位位置,易受sigmoid输出变化影响,导致诊断区段与故障区段差值偏高,因此提出基于EEMD与小波阈值设计一种全新的配电线路单相接地故障诊断方法,即利用EEMD与小波阈值生成接地故障信号降噪流程,设计了配电线路单相接地故障诊断算法,从而完成配电线路单相接地故障诊断。实验结果表明,设计的单相接地线路EEMD小波阈值故障诊断方法的诊断区段与故障区段较拟合,证明设计的单相接地故障诊断方法的诊断效果较好,具有准确性,有一定的应用价值,为提高配电线路的输配安全性作出一定的贡献。The conventional single-phase grounding fault diagnosis method for distribution lines mainly uses deep denoising autoencoders(DAE)to output fault location,which is easily affected by changes in sigmoid output,resulting in a high difference between the diagnostic section and the fault section.Therefore,this paper proposes a new single-phase grounding fault diagnosis method for distribution lines based on EEMD and wavelet threshold design.A denoising process for ground fault signals was generated using EEMD and wavelet thresholding,and a single-phase ground fault diagnosis algorithm for distribution lines was designed,thus completing the diagnosis of single-phase ground faults in distribution lines.The experimental results show that the diagnostic section of the designed EEMD wavelet threshold fault diagnosis method for single-phase grounding lines fits well with the fault section,proving that the diagnostic effect of the designed single-phase grounding fault diagnosis method is good,accurate,and has certain application value,making a certain contribution to improving the transmission and distribution safety of distribution lines.

关 键 词：EEMD 小波阈值 配电线路 单相接地 诊断 

分 类 号：TM773[电气工程—电力系统及自动化]