本文選題：電能質(zhì)量　切入點(diǎn)：LabVIEW　出處：《鄭州大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：近年來，隨著經(jīng)濟(jì)的飛速發(fā)展，工業(yè)生產(chǎn)和居民生活用電量的大幅增加，隨之而來的是人們對于電能質(zhì)量的關(guān)注。電能質(zhì)量的優(yōu)劣不僅影響工業(yè)的正常生產(chǎn)和居民的日常生活，還間接反映了一個國家的經(jīng)濟(jì)實(shí)力。因此如何解決供電質(zhì)量的監(jiān)測和優(yōu)化問題得到了各界人士的關(guān)注，本文將從電能質(zhì)量監(jiān)測的背景、意義以及解決辦法等幾個方面來進(jìn)行闡述。 本文首先介紹了電能質(zhì)量監(jiān)測的背景和意義，分析了目前投入生產(chǎn)使用的監(jiān)測儀器的特點(diǎn)，說明了這個課題的重要性。查閱相關(guān)資料和國家標(biāo)準(zhǔn)，了解了電能質(zhì)量監(jiān)測的五大指標(biāo)的規(guī)定及允許范圍。重點(diǎn)分析了各個指標(biāo)的檢測算法，總結(jié)出每種算法的特點(diǎn)，找到適合在LabVIEW平臺上實(shí)現(xiàn)的方法，然后結(jié)合虛擬儀器技術(shù)，利用研華數(shù)據(jù)采集卡和工控機(jī)共同搭建了基于LabVIEW平臺下的電能質(zhì)量動態(tài)監(jiān)測儀。作為良好的人機(jī)交互界面，，LabVIEW軟件平臺和硬件結(jié)合方便，圖形化的編程語言更容易理解和修改，在編程過程中，重點(diǎn)進(jìn)行了前面板和程序面板的設(shè)計(jì)。尤其是對于間諧波的測量分析，采用了加窗FFT結(jié)合大采樣率的方法，同時進(jìn)行閾值判斷和相鄰值比較，使測量結(jié)果更加具體和精確。除此之外，對于數(shù)據(jù)的儲存和讀取也采用了分時分段不同間隔的方法，便于長時間的數(shù)據(jù)儲存和讀取，為今后電能質(zhì)量缺陷的研究和分析提供了科學(xué)的數(shù)據(jù)和報(bào)告。 最后，利用軟件平臺的仿真功能進(jìn)行測試，分別驗(yàn)證了電能質(zhì)量動態(tài)監(jiān)測儀的界面控制和顯示功能以及對電量信號的采集、測量、分析、儲存、回放等功能，說明該監(jiān)測儀具備了優(yōu)良的在線監(jiān)測和實(shí)時分析的性能，相比其它監(jiān)測設(shè)備，操作更簡單、存儲更方便。
[Abstract]:In recent years, with the rapid development of economy, the industrial production and residential electricity consumption have increased dramatically, followed by the attention of people to the power quality, which not only affects the normal production of industry and the daily life of residents. It also indirectly reflects the economic strength of a country. Therefore, how to solve the problem of monitoring and optimizing the quality of power supply has attracted the attention of people from all walks of life. This paper will focus on the background of power quality monitoring. The meaning and the solution and so on several aspects to carry on the elaboration. This paper first introduces the background and significance of power quality monitoring, analyzes the characteristics of the monitoring instruments used in production at present, and explains the importance of this subject. In this paper, the regulations and permitted range of five indexes of power quality monitoring are understood. The detection algorithms of each index are analyzed emphatically, the characteristics of each algorithm are summarized, and the method suitable to be realized on LabVIEW platform is found, and then the virtual instrument technology is combined. The power quality dynamic monitor based on LabVIEW platform is built by using Yanhua data acquisition card and industrial control computer. As a good human-computer interface, LabVIEW software platform and hardware are combined conveniently, and the graphical programming language is easier to understand and modify. In the process of programming, the design of front panel and program panel is emphasized, especially for the measurement and analysis of interharmonics, the method of windowed FFT combined with large sampling rate is adopted, and the threshold value is judged and the adjacent value is compared. Besides, for data storage and reading, time-sharing and piecewise different intervals are also used to facilitate data storage and reading for a long period of time. It provides scientific data and report for the research and analysis of power quality defects in the future. Finally, the simulation function of the software platform is used to test and verify the interface control and display functions of the power quality dynamic monitor, as well as the functions of collecting, measuring, analyzing, storing, replaying and so on. It shows that the monitor has excellent performance of on-line monitoring and real-time analysis. Compared with other monitoring equipment, it is easier to operate and more convenient to store.
【學(xué)位授予單位】：鄭州大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM930

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