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一种能滤去衰减直流分量的改进全波傅氏算法
引用本文:苏文辉,李钢.一种能滤去衰减直流分量的改进全波傅氏算法[J].电力系统自动化,2002,26(23):42-44.
作者姓名:苏文辉  李钢
作者单位:国电南瑞科技股份有限公司,江苏省南京市,210003
摘    要:全波傅氏算法是基于采样信号不含衰减直流量推导出来的,对衰减直流分量的滤除不明显,提出一种改进的算法,通过增加两个采样点,计算并消去由直流衰减分量通过全波傅氏算法计算得到的值,使新算法对直流分量的滤波效果得到大大改善,理论上可以消除任意衰减时间常数的直流分量对所求各次谐波分量的影响,仿真试验表明,该算法消除直流衰减分量的能力强,计算量小,具有实际应用前景。

关 键 词:衰减直流分量  电力系统  继电保护  微机保护  全波傅氏算法
收稿时间:1/1/1900 12:00:00 AM
修稿时间:1/1/1900 12:00:00 AM

AN IMPROVED FULL-WAVE FOURIER ALGORITHM FOR FILTRATING DECAYING DC COMPONENT
Su Wenhui,Li Gang.AN IMPROVED FULL-WAVE FOURIER ALGORITHM FOR FILTRATING DECAYING DC COMPONENT[J].Automation of Electric Power Systems,2002,26(23):42-44.
Authors:Su Wenhui  Li Gang
Abstract:The full wave Fourier algorithm is derived with the sampling signal without decaying DC component, and can't filtrate this component. By adding two sampling points, the new algorithm can filtrate it evidently. In theory, the influence of the exponential DC component on any harmonic component with random decay time constant can be completely eliminated with the algorithm. The simulation results prove that the algorithm can filtrate exponential DC component and just need little amount of calculation. It has good prospect of practical application.
Keywords:microprocessor  based protection  decaying DC component  full  wave Fourier algorithm
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