臺灣博碩士論文加值系統

本論文提出三種以個人電腦為基礎之虛擬電力分析儀，所提出的虛擬儀表(Virtual Instrument, VI)是在Windows 95/98作業系統下以LabVIEW (Laboratory Virtual Instrument Engineering Workbench)軟體所設計。利用此種設計方法，虛擬儀表的功能可依使用者的需求而逐漸擴充其功能。在本論文中所介紹的虛擬電力分析儀其主要功能包括一個通用的示波器、諧波分析、功率計算以及各種電力品質分析記錄器。在虛擬電力分析儀的研發中，我們發展了許多的附屬虛擬儀表(sub-VIs)，透過這些附屬虛擬儀表間的彼此連接可設計出所需的電力品質分析功能並完成軟體IC (Integrated Circuit, IC)的構想。

Three PC-based Virtual Instruments (VI) for power analyzers are developed in the thesis. The proposed VI is based on LabVIEW (Laboratory Virtual Instrument Engineering Workbench) language under the workbench of the MS Windows 95/98 operating system. Instead of theoretical research, some practical sub-VIs, such as the harmonic analyzer, power factor and power measurement, TCP/IP read and TCP/IP write etc., are developed first. By using those developed sub-VIs, three VI including the power analyzer, power quality recorder and internet-based power quality recorder can be designed. The capability of the proposed system can be expanded according to the requirements of users. One of the most attractive facts is that a well-developed VI can be considered as a software IC and used to design a large-scale or complex system. The reuse of the existed sub-VIs makes the development of a new VI easier.

第一章　緒論…………………………………………………………………1
1-1　背景簡介………………………………………………………………1
1-2　研究動機………………………………………………………………1
1-3　論文架構………………………………………………………………6
第二章　Lab VIEW軟體簡介…………………………………………………7
2-1　虛擬儀表的組成………………………………………………………7
2-2　LabVIEW的特性…………………………………………………………8
第三章　虛擬儀表硬體架構…………………………………………………11
3-1　訊號處理………………………………………………………………12
3-1-1　電壓訊號……………………………………………………………12
3-1-2　電流訊號……………………………………………………………13
3-2　訊號擷取介面…………………………………………………………15
第四章　虛擬儀表主要功能…………………………………………………18
4-1　示波器…………………………………………………………………18
4-1-1　資料擷取……………………………………………………………19
4-1-2　存檔…………………………………………………………………21
4-1-3　讀檔…………………………………………………………………22
4-2　諧波分析………………………………………………………………23
4-2-1　諧波成份……………………………………………………………23
4-2-2　總諧波失真率THD(%)………………………………………………25
4-2-3　頻率分析……………………………………………………………26
4-3　功率計算………………………………………………………………28
4-3-1　瞬間功率……………………………………………………………28
4-3-2　平均功率……………………………………………………………29
4-3-3　功率因數……………………………………………………………31
4-4　分析記錄器……………………………………………………………34
4-4-1　諧波分析記錄………………………………………………………34
4-4-2　瞬間功率記錄………………………………………………………36
4-4-3　功率因數記錄………………………………………………………37
4-4-4　平均功率記錄………………………………………………………38
4-4-5　頻率分析記錄………………………………………………………40
第五章　設計成果……………………………………………………………42
5-1　虛擬電力分析儀………………………………………………………42
5-1-1　人機界面……………………………………………………………42
5-1-2　操作方法……………………………………………………………45
5-2　電力品質分析記錄器…………………………………………………47
5-2-1　人機界面……………………………………………………………47
5-2-2　操作方法……………………………………………………………49
5-3　透過網路監控之電力分析記錄器……………………………………56
5-3-1　人機界面……………………………………………………………56
5-3-2　操作方法……………………………………………………………57
第六章　實際操作結果……………………………………………………58
6-1　虛擬電力分析儀………………………………………………………58
6-1-1　諧波分析……………………………………………………………58
6-1-2　家電負載……………………………………………………………60
6-2　電力品質分析記錄器…………………………………………………61
6-2-1　家庭用電……………………………………………………………62
6-2-2　研究室照明用電……………………………………………………67
6-3　透過網路監控之電力分析記錄器……………………………………68
6-3-1　server端……………………………………………………………68
6-3-2　client端……………………………………………………………69
第七章 結論與未來研究方向………………………………………………71
7-1結論………………………………………………………………………71
7-2未來研究方向……………………………………………………………72

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