电器与能效管理技术Issue(24)：13-19,7.DOI:10.16628/j.cnki.2095-8188.2016.24.003
基于Welch算法故障电弧电流信号功率谱的特征与电弧故障诊断
Power Spectrum Characteristics of Fault Arc Current Signal Based on Welch Algorithm and Arc Fault Diagnosis
摘要
Abstract
In order to realize the accurate diagnosis of arc fault in low voltage distribution system,the power spectrum of fault arc current signal under mixed load conditions was analyzed by using Welch algorithm,based on the experimental results of the carbon electrode arc fault.Three characteristics of arc fault current signal power spectrum are proposed:(1) there is a rising trend in the frequency range;(2) the change of power spectrum is relatively stable;(3) the power spectrum value increases in a certain degree.According to the three characteristics of power spectrum,a new method,the method of area change rate,was presented for the arc fault analysis and diagnosis.The study shows that the method can be used in the arc fault diagnosis of residential distribution system.The research result can provide theoretical guidance for the development of arc fault diagnosis.关键词
电弧故障诊断/Welch算法/功率谱/面积变化率/居民配电系统Key words
arc fault diagnosis/Welch algorithm/power spectrum/area change rate/residential distribution system分类
信息技术与安全科学引用本文复制引用
管红立,王博文,王启龙,赵智忠..基于Welch算法故障电弧电流信号功率谱的特征与电弧故障诊断[J].电器与能效管理技术,2016,(24):13-19,7.基金项目
国家自然科学基金项目(51171057) （51171057）
河北省高等学校创新团队领军人才培养计划(LJRC003) （LJRC003）
