摘要
提出一种矿用低压电缆绝缘监测的新方法,通过提取各条线路接地线电流,利用小波奇异性检测原理构造模极大值矩阵,根据比较尺度上各条线路的模极大值判断出绝缘劣化线路。基于MATLAB搭建井下4条配电线路的低压电缆模型,对初始相角0°、90°以及加入白噪声干扰3种情况进行仿真分析,结果表明该方法能够正确选择出绝缘劣化线路。
Present a new method of insulation monitioring on mine low cables, which contains, extracting each line＇s grounding current and structuring modulus maximum matrixes by wavelet singularity, then comparing the modulus maximum on decomposition scales,finally the insulation deterioration line can be found. A model consisit of four lines is built based on MATLAB. Three conditions is considered which are initial phase 0°,initial phase 90° and white noise interference in every line, three simulation results prove the method can correctly point out the deterioration line.
出处
《煤炭技术》
北大核心
2017年第9期223-226,共4页
Coal Technology
关键词
低压电缆
绝缘监测
小波分析
接地线电流
low voltage cables
insulation monitioring
wavelet analysis
grounding current
