一种基于小波的单相接地故障检测方法  

A Detection Method of Single-phase Grounding Signal Based on Wavelet

作　　者：丁绪星[1] 黄小荣[1] 张玉峰[1] 姚健[1] 

机构地区：[1]安徽师范大学,安徽芜湖241000

出　　处：《无线电通信技术》2014年第5期79-81,共3页Radio Communications Technology

摘　　要：架空高压线单相接地故障信号是奇异信号,利用小波变换的时频局部化性质,可有效地检测该奇异信号。搭建了一个简单的架空高压线输电线路模型,将产生的单相接地故障信号进行小波变换,分析得出故障发生的起止时刻;提出一种基于DB10小波的单相接地故障信号的检测方法,用MATLAB进行了仿真。仿真结果表明,此方法在准确快速检测该奇异信号,同时可最大限度地减少信号的损失,简化硬件检测电路,易于实现。The single-phase grounding fault signal is singular signal on high-vohage overhead line,which can beeffectively detectedby using the properties of wavelet transform time-frequency localization.A simple transmission line model of high-voltage overhead linesis established, the wavelet transform is performed for single-phase grounding fault signals generated from the model, and the start andend time of failure is analyzed.This paper proposes a detection method of fault signal based on DB10 wavelet by MATLAB simulation.The simulation results show that the method can accurately detect the singular signal,and it can minimize the loss of signal,simplify thecircuit detection hardware and be implemented easily.

关 键 词：架空高压线 单相接地故障信号 小波分析 信号奇异性检测 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]