基于混合卷积窗六谱线插值的全相位谐波检测算法  

All-phase Harmonic Detection Algorithm Based on Six⁃spectral Line Interpolation of Hybrid Convolution Window

作　　者：陆东亮 张明 徐诗露 夏若平 张倩 LU Dongliang;ZHANG Ming;XU Shilu;XIA Ruoping;ZHANG Qian(School of Electronic and Electrical Engineering,Wuhan Textile University,Wuhan 430200,China)

机构地区：[1]武汉纺织大学电子与电气工程学院,武汉430200

出　　处：《电力电容器与无功补偿》2023年第4期41-47,共7页Power Capacitor & Reactive Power Compensation

基　　金：国家自然科学基金(51477124)。

摘　　要：非线性负荷的接入使得电网中存在大量的谐波,为了减小传统傅里叶变换在非同步采样中出现的频谱泄露以及栅栏效应等问题,文中提出了一种基于Blackman和Nuttall混合卷积窗六谱线插值的新型谐波检测算法。相比于传统的一些窗函数,文中提出的混合卷积窗具有较好的主瓣以及旁瓣特性,通过结合六谱线插值以及改进的全相位傅里叶算法对谐波的幅值、频率、相位3大参数进行检测。采用与其他算法对复杂谐波信号检测的仿真对比,验证了Blackman和Nuttall混合卷积窗六谱线插值算法在检测复杂信号更好的优越性以及更强的抗干扰能力。The access of nonlinear loads causes a large number of harmonics in the power grid.In order to reduce such problems as spectrum leakage and fence effect in asynchronous sampling of traditional Fourier transform,a kind of new harmonic detection algorithm of hybrid convolution six⁃special line interpolation based on Blackman and Nuttall is proposed in this paper.Compared with some traditional window func⁃tions,the hybrid convolution window proposed in the paper has better main lobe and side lobe characteris⁃tics.By combining six⁃spectral line interpolation and an improved all⁃phase Fourier algorithm,such three parameters as amplitude and frequency of harmonics as well as phase are detected.The simulation compari⁃son with other algorithms for the detection of complex harmonic signals verifies that the Blackman and Nut⁃tall hybrid convolution window six⁃spectrum interpolation algorithm has better superiority and stronger an⁃ti-interference ability in detecting complex signals.

关 键 词：混合卷积窗 全相位傅里叶 六谱线 谐波检测 

分 类 号：TM935[电气工程—电力电子与电力传动]