本文選題：電能質(zhì)量監(jiān)測　切入點(diǎn)：諧波　出處：《河南理工大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著電力行業(yè)的發(fā)展,電力電子技術(shù)的廣泛應(yīng)用以及非線性設(shè)備的大量使用,電能質(zhì)量問題日益成為供用電雙方關(guān)注的焦點(diǎn)。電能質(zhì)量監(jiān)測技術(shù)作為電能質(zhì)量問題的定量衡量和鑒定手段,如何實(shí)時、準(zhǔn)確監(jiān)測電力參數(shù)是研究的核心內(nèi)容。電網(wǎng)結(jié)構(gòu)的不斷變化,傳統(tǒng)的監(jiān)測系統(tǒng)已經(jīng)不能滿足需求,分布式電能質(zhì)量在線監(jiān)測系統(tǒng)急需研發(fā)。本文首先介紹了電能質(zhì)量指標(biāo)的測量原理,對現(xiàn)存的幾種諧波檢測方法進(jìn)行討論,從嵌入式開發(fā)、大規(guī)模使用的角度選擇了FFT算法;其次對使用FFT算法帶來的頻譜泄漏和柵欄效應(yīng)進(jìn)行了詳細(xì)分析,提出了基于十項(xiàng)余弦窗的雙譜線插值FFT算法,并推導(dǎo)算法和Matlab仿真,驗(yàn)證算法的準(zhǔn)確性。根據(jù)分布式電能質(zhì)量在線監(jiān)測系統(tǒng)的需要,本文給出了基于數(shù)字信號處理器TMS320F28335的電能質(zhì)量監(jiān)測裝置總體設(shè)計(jì)方案,并對各個電路進(jìn)行了詳細(xì)的設(shè)計(jì),包括硬件設(shè)計(jì)和軟件設(shè)計(jì)兩部分,完成裝置研發(fā)。該裝置與日本橫河功率測試儀WT3000進(jìn)行對比測量,可以達(dá)到預(yù)期水平。
[Abstract]:With the development of power industry, the wide application of power electronic technology and the extensive use of nonlinear equipment, Power quality problem has become the focus of attention of both power supply and power supply. Power quality monitoring technology, as a means of quantitative measurement and identification of power quality problems, how to real-time, Accurate monitoring of power parameters is the core of the research. With the continuous change of power network structure, the traditional monitoring system can no longer meet the demand. The distributed on-line power quality monitoring system is in urgent need of development. Firstly, this paper introduces the measuring principle of power quality index, discusses several existing harmonic detection methods, and selects FFT algorithm from the perspective of embedded development and large-scale application. Secondly, the spectrum leakage and fence effect brought by using FFT algorithm are analyzed in detail. A double spectral line interpolation FFT algorithm based on ten cosine windows is proposed, and the algorithm and Matlab simulation are derived. To verify the accuracy of the algorithm. According to the needs of distributed online power quality monitoring system, this paper gives the overall design scheme of power quality monitoring device based on digital signal processor (TMS320F28335), and designs each circuit in detail. It includes two parts: hardware design and software design. The device is compared with the Yokogawa Power Tester (WT3000) and can reach the expected level.
【學(xué)位授予單位】：河南理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM76

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本文編號：1626326