全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
电网技术  2011 

纳托尔自卷积窗加权电力谐波分析方法

, PP. 134-139

Keywords: 谐波分析,纳托尔(Nuttall)自卷积窗,旁瓣性能,快速傅里叶变换

Full-Text   Cite this paper   Add to My Lib

Abstract:

在非同步采样下,采用快速傅里叶变换进行电力谐波分析容易造成频谱泄露和栅栏效应。窗函数加权可有效抑制频谱泄漏,但经典窗函数的抑制能力受旁瓣性能的制约。分析了纳托尔(Nuttall)窗的频谱特性后,提出了一种通过若干Nuttall窗自卷积运算得到的新型窗函数——Nuttall自卷积窗。分析了Nuttall自卷积窗的主瓣、旁瓣性能,建立了Nuttall自卷积窗加权的改进FFT谐波分析方法。与经典窗函数相比,Nuttall自卷积窗优良的旁瓣性能可有效抑制频谱泄漏的影响,改进FFT算法能有效克服卷积带来的频率分辨率降低的问题。仿真结果表明,Nuttall自卷积窗抑制频谱泄漏效果好,改进FFT算法能对结果进行有效修正,谐波参数估计准确度优于经典窗函数。

References

[1]  Al-Hasawi W M,El-Naggar K M.New digital filter for unbalance distorted current and voltage estimation in power systems[J].Electric Power System Research,2008,78(7):1290-1301.
[2]  Zhang Y,Cheng H.A robust support vector algorithm for harmonic and interharmonic analysis[J].Electric Power System Research,2005,73(3):393-400.
[3]  Zhu T X.Exact harmonics/interharmonics calculation using adaptive window width[J].IEEE Transactions on Power Delivery,2007,22(4):2279-2288.
[4]  Yang J Z,Yu C S,Liu C W.A new method for power signal harmonic analysis[J].IEEE Transactions on Power Delivery,2005,20(2):1235-1239.
[5]  Dariusz B,Andrzej B.Improvement of accuracy of power system spectral analysis by coherent resampling[J].IEEE Transactions on Power Delivery,2009,24(3):1004-1013.
[6]  赵文春,马伟明,胡安.电机测试中谐波分析的高精度FFT算法[J].中国电机工程学报,2001,21(12):83-87.
[7]  Zhao Wenchun,Ma Weiming,Hu An.FFT algorithm with high accuracy for harmonic analysis in the electric machine[J].Proceedings of the CSEE,2001,21(12):83-87(in Chinese).
[8]  Pang Hao,Li Dongxia,Zu Yunxiao,et a1.An improved algorithm for harmonic analysis of power system using FFT technique[J].Proceedings of the CSEE,2003,23(6):50-54 (in Chinese).
[9]  Rife D C,Vincent G A.Use of the discrete Fourier transform in the measurement of frequencies and levels of tones[J].The Bell System Technical Journal,1970,49(2):197-228.
[10]  Zhang F,Geng Z,Yuan W.The algorithm of interpolating windowed FFT for harmonic analysis of electric power system[J].IEEE Transactions on Power Delivery,2001,l6(2):160-164.
[11]  许珉,张鸿博.基于Blackman-harris窗的加窗FFT插值修正算法[J].郑州大学学报:工学版,2005,26(4):99-101.
[12]  Xu Min,Zhang Hongbo.The correction algorithm based on the Blackman-Harris windows and interpolated FFT[J].Journal of Zhengzhou University:Engineering Science,2005,26(4):99-101(in Chinese).
[13]  Du?an Agrez.Interpolation in the frequency domain to improve phase measurement[J].Measurement,2008,41(2):230-235.
[14]  Daniel B,Dominique D.Amplitude estimation by a multipoint interpolated DFT approach[J].IEEE Transactions on Instrumentation and Measurement,2009,58(5):1316-1323.
[15]  Nuttall A H.Some windows with very good sidelobe behavior[J].IEEE Transactions on Acoustics Speech Signal Processing,1981,29(1):84-91.
[16]  GB/T 15945—2008 电能质量电力系统频率偏差[S].
[17]  Milenko B D,?eljko R D.Frequency measurement of distorted signals using Fourier and zero crossing techniques[J].Electric Power System Research,2008,78(8):1407-1415.
[18]  Spark Y X,Simon X Y.Power system frequency estimation using supervised Gauss-Newton algorithm[J].Measurement,2009,42(1):28-37.
[19]  Li Y F,Chen K F.Eliminating the picket fence effect of the fast Fourier transform[J].Computer Physics Communications,2008,178(7):486-491.
[20]  庞浩,李东霞,俎云霄,等.应用FFT进行电力系统谐波分析的改进算法[J].中国电机工程学报,2003,23(6):50-54.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133