摘要
提出了一种基于小波理论的区分励磁涌流和短路电流的新原理。利用小波理论进行涌流特征提取，通过小波变换的模局部极大值的特性提取励磁涌流的间断角特征，在此基础上定性地区分励磁涌流和短路电流。该原理对（电流互感器）ＣＴ饱和具有很强的鲁棒性，理论分析和ＥＭＴＰ仿真试验均表明该原理不受ＣＴ饱和的影响，效果理想。
A principle of discriminating the inrush current and fault current of the power transformers based on the Wavelet is presented in the paper. The dead angle is a dominant and essential characteristic of the inrush current. This feature is extracted from the local maxima of the wavelet transforms and described with fuzzy sets. All the conclusions are verified by the EMTP and the electric power system simulation in the lab of NCEPU and proved to be highly accurate and fast.
出处
《中国电机工程学报》
EI
CSCD
北大核心
1999年第7期1-5,76,共6页
Proceedings of the CSEE
基金
国家自然科学基金
