广东电力2024，Vol.37Issue(4)：10-23,14.DOI:10.3969/j.issn.1007-290X.2024.04.002
基于数学形态学和沃尔什变换的配电网高阻接地故障检测
High Impedance Grounding Fault Detection for Distribution Network Based on Mathematical Morphology and Walsh Transform
摘要
Abstract
The high impedance grounding fault(HIGF)often occurs in the distribution network.Because the characteristics of the one-dimensional zero sequence current signal of the fault are vague and weak,it is easy to be confused with inrush current(IC)and capacitor switching(CS).Therefore,this paper proposes an algorithm based on phase space reconstruction(PSR),mathematical morphology(MM)and Walsh transform(WT)to realize the recognition of HIGF.Firstly,the paper uses the joint parameter selection algorithm to determine the delay time and embedding dimension,and the coordinate reconstruction method to reconstruct the phase space of the simulated zero sequence current signal to obtain the reconstructed trajectory map,so as to explore the characteristics that can't be observed in one-dimensional space.Then,it uses MM to denoise the reconstructed images and extract the edge features.Then,the paper adopts a fusion MM and WT algorithm to extract the reconstructed image features.Finally,the recognition of HIGF and other disturbance events is realized by calculating the pulse factor and symmetry factor of the extracted image features.The feasibility of the algorithm is further verified by simulation on the platform RSCAD/RTDS.关键词
配电网/高阻接地故障/相空间重构/数学形态学/沃尔什变换Key words
distribution network/high impedance grounding fault/phase space reconstruction/mathematical morphology/Walsh transform分类
信息技术与安全科学引用本文复制引用
梅广,季天瑶,陈嘉伟,丁志..基于数学形态学和沃尔什变换的配电网高阻接地故障检测[J].广东电力,2024,37(4):10-23,14.基金项目
国家自然科学基金项目(52077081) （52077081）
