基于窗函数和谱线插值理论的谐波检测方法  

Harmonic detection method based on the theory of windows and spectrum line interpolation

作　　者：李振华[1,2] 胡廷和 杜亚伟 张涛[1] 李振兴[1] LI Zhenhua;HU Tinghe;DU Yawei;ZHANG Tao;LI Zhenxing(College of Electrical Engineering&New Energy,China Three Gorges University,Yichang 443002,China;Hubei Provincial Research Center on Microgrid Engineering Technology(China Three Gorges University),Yichang 443002,China)

机构地区：[1]三峡大学电气与新能源学院,湖北宜昌443002 [2]湖北省微电网工程技术研究中心(三峡大学),湖北宜昌443002

出　　处：《电力系统保护与控制》2019年第22期78-88,共11页Power System Protection and Control

基　　金：湖北省教育厅重点项目(D20181204);国家自然科学基金资助项目(51507091);三峡大学硕士学位论文培优基金(2019SSPY052)~~

摘　　要：基于快速傅里叶变换(Fast Fourier Transform,FFT)的谐波检测方法,因其理论原理简单和易于嵌入测量系统中而得到广泛应用,但由于存在频谱泄漏和栅栏效应而造成检测准确度不高,因此对于FFT谐波检测方法的改进成为急需解决的问题。首先介绍基于窗函数理论的谐波检测方法和基于谱线插值理论的谐波检测方法,阐述了这两种方法的具体原理,分析和总结了改进方法的研究现状。然后通过仿真分析对所述的两种改进方法进行验证,并分别给出相应的结论。最后对基于窗函数和基于谱线插值理论的谐波检测方法进行总结以及对未来的研究方向进行展望。Harmonic detection method based on Fast Fourier Transform(FFT)is widely used because the principle of FFT is simple as well as FFT can be easily embedded in measurement system.However,the detection accuracy is not high enough due to the issue of spectrum leakage and fence effect.Therefore,the improvement of harmonic detection method based on FFT has become an urgent problem to be resolved.Firstly,the harmonic detection method based on the theory of windows and the theory of spectrum line interpolation are introduced in this paper.The principles of the two improved methods are elaborated,and the research status of the improved methods is analyzed and summarized.Then the simulation are carried out to validated the feasibility of the two improved methods,and the corresponding conclusions are given respectively.Finally,the harmonic detection method based on the theory of windows and theory of spectrum line interpolation is summarized and the future researches are discussed.

关 键 词：谐波检测 窗函数理论 谱线插值理论 余弦窗 优化窗 卷积窗 

分 类 号：TM7[电气工程—电力系统及自动化]