基于混合卷积窗三谱线插值的谐波分析方法  

A Triple⁃spectrum⁃line Interpolation Harmonic Analysis Method Based on Hybrid Convolution Window

作　　者：王鹤蓉 关焕新[1] 郭祎珅 杨柏 吴迪 WANG Herong;GUAN Huanxin;GUO Yishen;YANG Bo;WU Di(Shenyang Institute of Engineering,Shenyang 110136,China;State Grid Jinzhou Power Supply Company,Jinzhou 121000,China;State Grid Zhangye Power Supply Company,Zhangye 734000,China;State Grid Chaoyang Power Supply Company,Chaoyang 122000,China)

机构地区：[1]沈阳工程学院,辽宁沈阳110136 [2]国网锦州供电公司,辽宁锦州121000 [3]国网张掖供电公司,甘肃张掖734000 [4]国网朝阳供电公司,辽宁朝阳122000

出　　处：《山东电力技术》2021年第2期30-34,38,共6页Shandong Electric Power

基　　金：辽宁省教育厅科技项目(LYB201704)。

摘　　要：快速傅里叶变换(Fast Fourier Transform,FFT)在谐波检测分析中被广泛应用,但因非同步采样和非周期截断信号,会产生频谱泄漏和栅栏效应问题,导致谐波测量出现误差。为提高谐波测量的准确度,提出用Hanning窗和Kaiser窗运用卷积运算构成一种新的混合卷积窗函数的三谱线插值FFT的谐波检测方法。仿真结果表明,所提算法与单个窗函数和其他混合卷积窗相比,具有更高的精确度,且旁瓣衰减速度更快,验证了该算法的有效性。The fast Fourier transform(FFT)is widely used in harmonic analysis,however,due to asynchronous sampling and ape⁃riodic truncation of signals,spectrum leakage and fence effect problems will occur,resulting in errors in harmonic measurement.In order to improve the accuracy of harmonic measurement,a new harmonic detection method based on triple⁃spectrum⁃line inter⁃polation FFT was proposed in this paper,which using Hanning window and Kaiser window through convolution operation to con⁃struct a new hybrid convolution window function.Simulation results show that the proposed algorithm has higher accuracy and fast⁃er side lobe attenuation compared with single window function and other mixed convolution windows,which verifies the effective⁃ness of the proposed algorithm.

关 键 词：谐波检测 快速傅里叶变换 混合卷积窗 三谱线插值 HANNING窗 KAISER窗 

分 类 号：TM935[电气工程—电力电子与电力传动]