电测与仪表2012，Vol.49Issue(10)：73-77,5.
基于小波变换的变压器励磁涌流和故障电流识别研究
Research of Magnetizing Inrush Current and Fault Current Identification Based on Wavelet Transform in Transformer Protection
张晓 1张建文 1潘磊落1
作者信息
- 1. 中国矿业大学信息与电气工程学院,江苏徐州221008
- 折叠
摘要
Abstract
Differential protection is one of important protective schemes for transformers, accurate identification of magnetizing inrush current is the guarantee for reliable action, and it is also one of hard problems in transformers differential protection. The waveforms of magnetizing inrush current and fault current are obtained by modeling and simulating in Matlab/Simulink. Utilizing FFT, the waveform features of magnetizing inrush current are analyzed; and the level 3 detailed signal of magnetizing inrush current and fault current are detected different by wavelet transform. A wavelet transform method is proposed to recognize magnetizing inrush current and can be used in transformers differential protection.关键词
励磁涌流/故障电流/快速傅里叶变换/小波变换Key words
magnetizing inrush current/ fault current/ FFT/ wavelet transform分类
信息技术与安全科学引用本文复制引用
张晓,张建文,潘磊落..基于小波变换的变压器励磁涌流和故障电流识别研究[J].电测与仪表,2012,49(10):73-77,5.
