改进的间谐波分析法——加窗插值MUSIC法  

An Improved Interharmonics Analysis Algorithm Based on Windowed Interpolation and MUSIC

作　　者：张绍勇[1] 余志顽[1] 余冬荣[1] 

机构地区：[1]河海大学能源与电气学院,江苏南京210098

出　　处：《南京师范大学学报（工程技术版）》2011年第4期1-5,共5页Journal of Nanjing Normal University(Engineering and Technology Edition)

摘　　要：邻近谐波或基波的间谐波,是导致电压闪变的直接原因,准确检出该成分,对于改善电能质量具有重要意义.针对真实电网宽带多频的信号特性,提出了一种改进的间谐波分析法—加窗插值MUSIC法,该方法克服了加窗插值和MUSIC算法的局限.Matlab仿真表明加窗插值MUSIC法频率分辨率和精度优于加窗插值,相对传统求根MUSIC不需要估算信号个数,能有效消除伪谱的影响.Detecting interharmonics for flicker troubleshooting is highly desirable. Whereas these interharmonics are close to harmonic or fundamental component, it is always swamped by the main-lobe of harmonic nearby if the harmonic amplitude is much bigger than interharmonic amplitude, and vice versa. In this paper, an improved interharmonic analy- sis algorithm is proposed on the basis of the windowed interpolation and the MUSIC method. It is shown by matlab simu- lation that the new method enioys higher frequency resolution and is more nrecise than traditional anag_

关 键 词：间谐波 频率分辨率 加窗插值 MUSIC算法 

分 类 号：TM733[电气工程—电力系统及自动化]