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博碩士論文 etd-0614100-123803 詳細資訊
Title page for etd-0614100-123803
論文名稱
Title
數位電錶之研製
An Implementation of Digital Power Meter
系所名稱
Department
畢業學年期
Year, semester
語文別
Language
學位類別
Degree
頁數
Number of pages
127
研究生
Author
指導教授
Advisor
召集委員
Convenor
口試委員
Advisory Committee
口試日期
Date of Exam
2000-06-09
繳交日期
Date of Submission
2000-06-14
關鍵字
Keywords
數位信號處理、數位電錶、負載管理
Load management, Digital signal processing, Digital meter
統計
Statistics
本論文已被瀏覽 5716 次,被下載 4991
The thesis/dissertation has been browsed 5716 times, has been downloaded 4991 times.
中文摘要
針對不同電力用途,如電費的計算、電力品質的改善和直接負載控制,電力量測往往扮演非常重要的角色。以往的電力量測方法是以簡單的儀器在時域中,以電動力或熱力方式來進行量測。在較為新近的量測方法則是利用適當的取樣和量測技術,以數位方式在時域或頻域中進行電力參數的計算。在這些方法中,取樣及計算速度必須非常快速,以避免在處理電壓和電流信號時造成長時間的延遲。本論文的目標旨在製作出一有效率的數位式量測儀器,其能適用於正弦和非正弦的電力信號情況。我們將使用高效率的單晶片和採用在頻域的演算法以量測電力參數。我們預期此量測系統能提供高的執行速度和準確性且適用於較廣的頻寬,其量測能力將僅受制於取樣頻率的高低。
Abstract
Power measurement is important for various purposes such as revenue metering, power quality improvement, and direct load control. Various algorithms for power measurement have been proposed in the time domain, which implies a simple instrumentation, but more useful power formulations have been derived in the frequency-domain approach which would require appropriate sampling and measurement techniques to avoid long delay in processing voltage and current signals. The aim of this thesis to implement a measurement instrument that can measure the power components digitally and efficiently under sinusoidal and non-sinusoidal situations. We will use a high performance digital signal processing (DSP) chip and adopt a frequency domain based algorithm for the computation of power elements. The measurement system is expected to offer both high speed and accuracy, and can show wide spectra limited only by the sampling frequency.
目次 Table of Contents
目 錄
第一章 緒論…………………………………………………………1
1-1 研究背景與動機…………………………………..1
1-2 國內外研究概況…………………………………..6
1-3 論文內容大綱……………………………………..8
第二章 穩態電力參數計算……….…...……………….…..…9
2-1 時域計算方法……………………………….……9
2-2 頻域計算方法……………………………………10
2-2-1 Radix-2 FFT 演算法.…………..……....11
2-2-2 複數型快速傅立葉(CFFT)演算法……16
2-2-3 實數型快速傅立葉(RFFT)演算法..…..20
2-2-4 即時Goertzel Filter演算法………..…..22
2-3 使用FFT可能遭遇的問題……………….……31
第三章 硬體線路及軟體製作……………………………………..37
3-1 系統功能…………………………………………37
3-2 週邊設備功能………………….………………42
3-3 軟體程式功能……………………………………58
3-4 8051週邊作業軟體流程……..…………………69
第四章 誤差評估與測試結果.…………………………………..75
4-1 軟硬體誤差評估…………………………………75
4-2 演算法效益評估…………………………………80
4-3 量測結果與討論…………………………………86
第五章 結論與未來研究方向…………………………………..…94
參考文獻 …….……….…………………………………………..…96
附錄一 CFFT演算法程式…..…………………………………..…99
附錄二 RFFT演算法程式……………………………………..…109
附錄三 Goertzel Filter演算法程式……….……….…………..…119

參考文獻 References
參考文獻
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