基于多特征量综合的接地故障检测方法  

Ground Fault Detection by Utilizing Multiple Characteristic Variables

作　　者：陈映孜 CHEN Yingzi(College of Engineering,University of Hong Kong,Hong Kong 999077,China)

机构地区：[1]香港大学工程学院,中国香港999077

出　　处：《电工技术》2024年第22期197-200,共4页Electric Engineering

摘　　要：目前配电网接地故障检测研究大多聚焦于故障的某一特征量,存在一定的局限性。为了准确识别各类不同接地故障,对故障相电压暂态分量、故障相电流暂态直流分量、故障点过渡电阻大小、故障点燃弧性质提出了4个特征提取方法,并分析了特征量相应的故障检测作用,提出了一个基于多特征量综合的接地故障检测方法。MATLAB仿真验证表明该方法理论上具有可行性。At present,most of the studies on distributing network ground fault detection focus on one certain characteristic variable,and thus are limited to some extent.In order to accurately distinguish various kinds of ground faults,this paper proposes four feature extraction methods for fault phase voltage transient component,fault phase current transient DC component,fault point transition resistance,and fault ignition arc property.It analyzes the fault detection function of the corresponding characteristic variables,and proposes a ground fault detection method based on the multiple characteristic variables.MATLAB simulation verifies the feasibility of the proposed method.

关 键 词：配电网 接地故障 检测方法 特征量 

分 类 号：TM727[电气工程—电力系统及自动化]