摘要
针对几种消除全波傅立叶算法中衰减非周期分量影响的方法 ,分析研究了它们在信号频率偏离额定值时的特性。研究结果表明 :单纯一次差分法在信号频率偏离额定值时 ,消除衰减非周期分量的特性最好 ;经差分全波傅氏算法求出的基波幅值最接近于实际值。
The characteristics of three removing DC offset methods in Fourier algorithms are studied when signal has fundamental frequency deviation. Analytical results show: when signal has fundamental frequency deviation, difference algorithm has better performance of removing DC offset than other methods; and the signal fundamental amplitude calculated by the difference & Fourier algorithm is close to the real value. The work of this paper provides reference basis for the algorithm of measure element of power swing simultaneously with short-circuit fault.
出处
《继电器》
CSCD
北大核心
2003年第4期15-17,共3页
Relay
