基于加窗插值FFT的电网谐波检测系统的研究  

Research of harmonic detection system based on windowed interpolation FFT

作　　者：李剑 马新春 覃桢桢 冷春花 

机构地区：[1]新疆电子研究所有限公司,新疆乌鲁木齐830013

出　　处：《电子设计工程》2014年第11期29-31,共3页Electronic Design Engineering

基　　金：新疆维吾尔自治区科技计划项目(201312109);乌鲁木齐高新区创新基金项目(CX13135W)

摘　　要：随着科学技术和国民经济的快速发展,电能的需求量也极大增长,同时电能质量越来越显示其重要性,电力部门和用户对电能质量的关注也日益增加。大量电力电子装置的迅速普及使得电网的谐波污染日益严重,谐波影响电力设备的安全使用,也对周围的通信系统和电网以外的设备带来危害。基于保护电力设备及合理利用电力资源的目的,采用DSP和单片机双CPU的结构,进行FFT变换、加窗插值等数字信号处理的方法,对电力参数进行准确、实时地检测。通过实验,得到了谐波次数及与之对应的有效值、谐波幅值及畸变率。With the rapid development of science and technology and the economy, the growth in demand for electricity is also great, but increasingly shown the importance of power quality, power sector and users concerned about power quality is also increasing. The rapid spread of a large number of power electronic devices makes harmonic pollution is worsening, harmonics affect the safe use of electrical equipment, and communication systems and devices around the outside of the grid harm. In order to protect electrical equipment and rational utilization of power resources, used DSP and microcontroller architecture dual CPU, digital signal processing such as FFT transform, windowed interpolation methods. On the electrical parameters accurately, real-time detection. Through the experiment, got the harmonic number corresponding rms amplitude and harmonic distortion.

关 键 词：DSP FFT 谐波分析 加窗插值 

分 类 号：TN713.1[电子电信—电路与系统]