摘要
当今对谐波的检测已有多种方法,不同的方法各有自己的优缺点。本文在分析比较主要检测方法优缺点之后,根据加窗插值的快速傅立叶算法的误差特点,估测出电网中的基频,然后用此基频的整数倍采样频率对含有谐波的电网信号进行准同步采样,再利用快速傅立叶变换估测各谐波参数的方法。仿真结果表明该方法的测量精度明显优于加窗插值的快速傅立叶算法。准同步采样可以减少采样周期,进一步提高算法的实时性。
A lot of different harmonic detection methods have been studied today,which have their own advantages and disadvantages.After analyzing and comparing the advantages and disadvantages of the main methods,and according to the error characters of interpolating windowed FFT algorithm for harmonic analysis,the paper presents the quasi-synchronous algorithm based on the interpolating theory,which estimates the grid-frequency using interpolating windowed FFT algorithm,then evaluates electrical harmonic parameters ...
出处
《电测与仪表》
北大核心
2008年第6期1-4,9,共5页
Electrical Measurement & Instrumentation
基金
湖南省自然科学基金资助项目(05JJ40001)
长沙市科技局科技攻关资助项目([2005]21号)
关键词
准同步采样
加窗插值
谐波
quasi-synchronous sampling
interpolating windowed
harmonic
