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題名 | 快速傅立葉轉換應用於動態電力諧波量測之截取效應=Truncation Effects of FFT on Harmonic Estimation of Dynamic Power System |
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作者 | 張永農; | 書刊名 | 國立虎尾技術學院學報 |
卷期 | 2 1999.03[民88.03] |
頁次 | 頁325-334 |
分類號 | 448.115 |
關鍵詞 | 諧波估測; 快速傅立葉轉換; 截取效應; 頻譜洩漏; 群集諧波; Harmonic estimation; Truncation effects; Fast fourier transform; FFT; Spectral leakage; Group-harmonics; |
語文 | 中文(Chinese) |
中文摘要 | 本文致力於討論應用快速傅立葉轉換於動態電力系統諧波估測時,由於不當的截 取方式所產生的截取效應。本文發展一重疊截取的方法,得到合理且快速呈現的諧波響應, 以避免不當的截取長度,影響諧波估測的準確性。本文並應用群集諧波辨識觀念及結合本文 開發的重疊截取取樣的方法,應用於動態諧波的量測,可降低頻譜洩漏並提供較真實的諧波 響應,為動態電力系統的諧波估算提供更合理及準確的諧波量測技術。 |
英文摘要 | In this paper, a new harmonics estimation technique of the dynamic power systems is investigated. Special efforts are concentrated on the truncation effects of the fast Fourier transform (FFT) on harmonic estimation. The truncation interval plays an important role in the calculations with the FFT. The truncation effects on the time response of the dynamic harmonic estimation are described. In addition, an overlap truncation method is developed to obtain a faster response with more reasonable manner. The concept of "group-harmonics" is introduced in this project. Based on the overlap truncation method and group-harmonic identification, the harmonic distortion of a dynamic power system can be evaluated in accurate results. |
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