摘要
全波傅氏算法是在周期信号基础上推导出来的,当采样信号中含有衰减直流分量时,就会产生误差。提出一种改进算法,通过两次全波傅氏变换,就能在未知衰减时间常数的情况下对衰减直流分量进行补偿。该算法简单,数据窗短,精度高,能满足实时性要求,具有较高的工程实用价值。
Full-wave Fourier algorithm is pushed out on the basis of cycle signals, when sampling signals contain decaying DC component, error will take place. An improved algorithm was proposed, with two times full-wave Fourier changes, compensation would be carried out to decaying DC component in the situation without knowing decaying time constant. The algorithm is simple, short in data window, high in accuracy, meeting requirements of real time, with higher engineering practical value.
出处
《电工电气》
2010年第4期23-24,32,共3页
Electrotechnics Electric
关键词
衰减直流分量
全波傅氏算法
微机保护
decaying DC component
full-wave Fourier algorithm
microprocessor-based protection
