基于Hanning和Nuttall的混合卷积窗谐波分析方法

HARMONIC ANALYSIS METHOD OF HYBRID CONVOLUTION WINDOW BASED ON HANNING AND NUTTALL

提出用Hanning窗和Nuttall窗进行卷积构造一种新型的窗函数——混合卷积窗,分析该窗函数的幅频特性,推导出基于混合卷积窗的三谱线插值法。将所提方法用于电力谐波分析,并与加经典窗算法进行对比。仿真分析表明,该混合卷积窗与Hanning窗和Nuttall窗相比具有更快的旁瓣衰减速率,能更好抑制频谱泄露。在非同步采样情况下,加混合卷积窗三谱线插值法分析谐波具有更高的计算精度。

A kind of new window function constructed by convolution-mix convolution window with Hanning window and Nuttall window is proposed.The amplitude and frequency characteristics of the window function are analyzed,and the triple spectral lines interpolation algorithm is derived based on mix convolution window.The proposed method is applied to power harmonic analysis and compared with the classical window algorithm.The simulation analysis shows that the mix convolution window has faster sidelobe attenuation rate and can better suppress spectrum leakage compared with Hanning window or Nuttall window.In non-synchronous sampling case,the triple spectral lines interpolation algorithm with mix convolution window for harmonic wave analysis has higher calculation accuracy.