[1]许珉,刘晓辉,王玺,等.基于加四项Nuttall窗递推DFT插值算法的高精度测频方法研究[J].郑州大学学报(工学版),2013,34(01):66-69.[doi:10.3969/j.issn.1671-6833.2013.01.016]
　XU Min,LIU Xiao-hui,WANG Xi,et al.Study on High-precision Frequency Measurement Method Based on the4-term Nuttall Windowed Recursive DFT Interpolation Algorithm[J].Journal of Zhengzhou University (Engineering Science),2013,34(01):66-69.[doi:10.3969/j.issn.1671-6833.2013.01.016]
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基于加四项Nuttall窗递推DFT插值算法的高精度测频方法研究()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
34
期数:
2013年01期
页码:
66-69
栏目:
出版日期:
2013-01-16

文章信息/Info

Title:
Study on High-precision Frequency Measurement Method Based on the4-term Nuttall Windowed Recursive DFT Interpolation Algorithm
作者:
许珉; 刘晓辉; 王玺; 等.
郑州大学电气工程学院,河南郑州,450001, 商丘供电公司,河南商丘,476000, 中电投河南开封发电分公司,河南开封,475000, 东华大学信息科学与技术学院,上海,201620
Author(s):
XU Min1; LIU Xiao-hui1; WANG Xi2; XU Hui3; WANG Yi3; CAO Yuan-qian4
1.College of Electrical Engineering，Zhengzhou University，Zhengzhou 450002，China;2.Shangqiu Electric Power Bureau ,Shangqiu 476000 ,China; 3.CPIl Kaifeng Power Branch Company，Kaifeng 475000，China; 4.College of lnformation Science andTechnology ，Donghua University ，Shanghai 201620，China
关键词:
递推DFT算法;  Nuttall窗;  频谱泄漏;  频率;  插值FFT算法
Keywords:
Key words; recursive DFT algorithm; Nuttall window;  spectrum leakage ;  frequency ;  interpolation FFT algo-rithm
分类号:
TM711
DOI:
10.3969/j.issn.1671-6833.2013.01.016
文献标志码:
A
摘要:
为了提高电力系统频率计算的精度,提出了一种基于加四项Nuttall窗递推DFT插值算法的高精度测频方法.由于四项余弦窗的能量更集中在主瓣,旁瓣非常小,因此加四项余弦窗FFT插值算法能极大地减小频谱泄漏的影响,谱间干扰很小,能较好地减小频谱泄漏和谐波等给频率测量带来的干扰,且该方法采用的频率偏移量计算公式简单.为了减小加四项余弦窗FFT的计算量,采用加四项余弦窗递推DFT的方法对传统方法进行了改进,有效减小了算法的计算量,提高了频率的计算精度.仿真计算结果验证了所提算法的计算精度.
Abstract:
In order to improve the accuracy of calculation of the power system frequency,a high-precision fre-quency measurement method based on the 4-term Nuttall windowed recursive DFT interpolation algorithm hasbeen put forward. Energy of four cosine window is more concentrated in the main lobe,very small in the sidelobe,so the 4-term Nuttall windowed recursive FFT interpolation algorithm can greatly reduce the effects ofspectral leakage,and spectral interference is very small, which can reduce the frequency measurement inter-ference caused by spectrum leakage and harmonic,and the frequency offset formula of the method is simple.In order to reduce the amount of plus four cosine windowed FFT calculation,this paper. introduces the plusfour cosine window recursive DFT method which improves the traditional method,these improvements effec-tively reduce the 4-term Nuttall windowed recursive DFT interpolation algorithm and improves the calculationaccuracy of the frequency.Simulation results verify the calculation accuracy of the proposed algorithm.
更新日期/Last Update: 1900-01-01