基于小波变换的变压器励磁涌流识别方法
田有文，王 睿
(沈阳农业大学信息与电气工程学院，沈阳110866)
摘要：以小波变换中多分辨分析为基础，提出一种以能量变化率的比值为判据一小波能量谱法，区分变压器励磁涌流和内部短路
电流。应用MATLAB的PSB工具箱建立励磁涌流与短路电流仿真模型，应用小波能量谱法提取励磁涌流与短路电流的小波能量
谱。仿真试验结果表明小波能谱法，计算简捷，能有效区分励磁涌流和短路电流。
关键词：变压器；励磁涌流；小波变换；小波能量谱法
中图分类号：TM771 文献标识码：A 文章编号：1000—1700(2010)02—0247-04
Detection M ethod for Transformers Inrush Current Using W avelet
Transf~Irm
TIAN You-wen，W ANG Rui
(College of Information and Electrical Engineering,Shenyang Agricuhural University，Shenyang 1 10866，China)
Abstract： Based on muhiresolution analysis in wavelet transform of the rate of change a ratio of．energy was proposed to
distinguish inrush current and short—circuit curent—wavelet energy method．The toolbox of PSB set in MATLAB was used to
establish simulation model for inrush and fauh currents．The wavelet energy spectrum of inrush curents and short circuit curent
was obtained through wavelet energy spectrum method．The simulink test results showed that wavelet energy spectrum method is
easy and can effoctively distinguish inrush curent and short circuit curent．
Key words：transformers；inrush curent；wavelet transform；wavelet energy spectrum method
发表于 2011-2-4 00:27:03
