| 电力系统故障信号的短时傅里叶分析及其应用 |
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| 引用本文： | 王晓茹,钱清泉.电力系统故障信号的短时傅里叶分析及其应用[J].西南交通大学学报,1999,34(4). |
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| 作者姓名： | 王晓茹 钱清泉 |
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| 作者单位： | 西南交通大学,电气化自动化研究所,成都,610031 |
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| 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。
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| 关 键 词： | 数字滤波方法 继电保护 短时傅里叶变换 高压输电线路 |
Application of Short Time Fourier Transform to the Fault Signal Analyses in HV Transmission Line |
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| Wang Xiaoru,Qian Qingquan.Application of Short Time Fourier Transform to the Fault Signal Analyses in HV Transmission Line[J].Journal of Southwest Jiaotong University,1999,34(4). |
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| Authors: | Wang Xiaoru Qian Qingquan |
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| Abstract: | 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. |
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| Keywords: | digital filtering methods relay protection short time Fourier transform HV transmission lines |
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