全文下载：2013040431
刘军1， 慕晓静2 ， 谭港3
(青岛科技大学 自动化与电子工程学院，山东 青岛 266042)
摘要：针对傅里叶算法不能滤除衰减直流分量的缺点，对该算法进行改进，通过对衰减直流分量的正、余弦分量进行系数补偿，消除了衰减直流分量的影响。利用MATLAB工具对改进傅里叶算法和传统傅里叶算法的计算结果进行仿真，由仿真结果可知，在不考虑非整次谐波分量影响时，改进傅里叶算法对滤除电流、电压故障信号中的衰减直流分量的效果十分理想。在此基础上，通过建立电力系统线路故障仿真模型，进一步验证了改进傅里叶算法能将计算误差由传统的10%降低至不到1%，在实际电力系统中具有可行性。
关键词：微机保护；傅里叶算法；MATLAB仿真；衰减直流分量
中图分类号： TP 273文献标志码： A
Microcomputer Relay Protection Based on Error Compensation Fourier Algorithm
LIU Jun1， MU Xiao-jing2， TAN Gang3
（College of Automation and Electronic Engineering, Qingdao University of Science and Technology,Qingdao 266042, China）
Abstract: The Fourier algorithm was improved according to its drawback that it can’t filter decaying direct current component.the effect of decaying direct current was eliminated by coefficient compensation of component of sine and cosine of decaying direct current. The computed results of improved and basic Fourier algorithm were simulated by MATLAB. From the simulation results, the improved algorithm is effective in filtering decaying DC component in fault signal. By establishing the simulation model of line fault in power system, the advantage of improved Fourier algorithm is lowering the error deeply which verified from 10% to nearly 1%. The improved algorithm is feasible in the actual power system.
Key words: microcomputer protection; Fourier algorithm; MATLAB simulation; decaying DC component
收稿日期：2012-10-27
作者简介：刘军（1961—），男，教授.
