摘要
根据短时傅里叶变换的滤波器组实现原理，研究了不同窗函数实现的５０Ｈｚ带通滤波器，分析比较了它们用于提取电力系统高压输电线路故障信号基频分量的能力。提出了一种具有实用价值的由一周波三角窗调制实现的５０Ｈｚ带通滤波器。
According to the principle of filter banks of short time Fourier transform, various 50 Hz band pass filters modulated with different windows are studied, and their performances in extracting fundamental components among corrupted fault signals in HV transmission lines are compared. Then, a practical 50 Hz band pass filter is proposed, which is modulated with one cycle Bartlett window and in performances better than the classical filters adopting one cyclic Fourier algorithm.
出处
《西南交通大学学报》
EI
CSCD
北大核心
1999年第4期431-435,共5页
Journal of Southwest Jiaotong University
关键词
继电保护
短时傅里叶变换
故障信号
电力系统
digital filtering methods
relay protection
short time Fourier transform
HV transmission lines
