基于小波边缘检测的接地网拓扑成像  

Grounding Network Topology Imaging Based on Wavelet Edge Detection

作　　者：黄明祥 HUANG Mingxiang(State Grid Fujian Institute of Economics and Technology,Fuzhou 350012)

机构地区：[1]国网福建经济技术研究院,福州350012

出　　处：《计算机与数字工程》2020年第10期2526-2532,共7页Computer & Digital Engineering

摘　　要：针对电磁法测量和定位接地网中存在精度不高和抗干扰性能差的问题,论文介绍了一种采用小波边缘检测方法实现对接地网拓扑结构的成像和定位。该方法基于磁场理论和离散小波变换计算方法通过对接地网在注入电流下磁场强度的测量实现接地网拓扑的定位和故障检测。由于该方法采用二维离散算法进行等效边缘检测,因此对测量噪声干扰具有鲁棒性,可以提取更稳定和清晰的接地导体边缘。仿真和实验证明,该方法可以准确地绘制接地网的拓扑结构并定位导体所存在的故障位置。Aiming at the problem of low precision and poor anti-interference performance in electromagnetic ground measurement and positioning grounding network,this paper introduces a wavelet edge detection method to realize the imaging and localization of the grounding network topology.The method is based on the magnetic field theory and the discrete wavelet transform calculation method to realize the positioning and fault detection of the grounding network topology by measuring the magnetic field strength of the grounding grid under the injection current.Since the method uses a two-dimensional discrete algorithm for equivalent edge detection,it is robust to measurement noise interference and can extract a more stable and clear ground conductor edge.Simulation and experiments show that the method can accurately map the topology of the grounding grid and locate the fault location of the conductor.

关 键 词：接地网 成像 磁感应 拓扑 小波边缘检测 

分 类 号：TM769[电气工程—电力系统及自动化]