間諧波檢測的FFT算法改進和DSP實現

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Improvement of the FFT algorithm in inter-harmonic detection and realization by DSP

1. Electrical Engineering Department, Wuhu Profession and Technology College, Wuhu 241000, China;
2. School of Power Electricity, South China University of Technology, Guangzhou 510640, China;
3. School of Automation, South China University of Technology, Guangzhou 510640, China

摘要: 提出一種快速傅里葉變換(FFT)的改進算法,該算法利用FFT的衰減特性,只需要對FFT算法做簡單的變換,就可以有效地消除頻譜泄漏分量,實現非整數次諧波的精確檢測,克服了傳統FFT的缺陷.該算法與加窗體FFT相比,具有相近的特性,在算法構造方面又比加窗體FFT算法更簡單,因此該算法更加適合應用于存儲資源有限的微處理器上.為證明該算法應用于微處理器的方便性,設計了一套基于數字信號處理(DSP)的諧波檢測裝置,并對該算法進行了驗證.
- 間諧波 /
- 信號檢測 /
- 快速傅里葉變換(FFT) /
- 數字信號處理(DSP)
Abstract: An improvement of the fast Fourier transform (FFT) algorithm was presented, which uses the fast attenuation characteristic of Fourier transform. This algorithm can effectively eliminate leakage component spectrum, realize non-rounded harmonic precision testing and overcome the shortcomings of the traditional FFT, only by a simple transformation of FFT. Because this algorithm is more similar to but simpler than the form FFT in algorithm structure, it is more suitable for storage on microprocessors which are limited-resource. A harmonic detection device based on digital signal processing (DSP) was designed to prove that the algorithm is applied to the convenience of microprocessors.
- inter-harmonic /
- signal detection /
- fast Fourier transform(FFT) /
- digital signal processing(DSP)