本文選題：電能質(zhì)量 + 諧波分析　； 參考：《電子科技大學》2012年碩士論文

【摘要】：近年來,現(xiàn)代電網(wǎng)及其負荷構(gòu)成發(fā)生了比較大的變化,大量電力電子設(shè)備投入使用,此類非線性、沖擊性負荷使電網(wǎng)產(chǎn)生了諸如電壓擾動、電壓波形畸變、閃變和諧波等電能質(zhì)量問題。與此同時,越來越廣泛應(yīng)用的電子儀器和自動化設(shè)備等敏感設(shè)備對電能質(zhì)量的要求也越來越高。 針對日益嚴重的電能質(zhì)量問題和用電設(shè)備對電能質(zhì)量的要求日漸提高的現(xiàn)狀,研究和設(shè)計用于監(jiān)測和分析電網(wǎng)電能質(zhì)量的高性能電能質(zhì)量檢測裝置就具有很重要的意義。論文結(jié)合國內(nèi)外電能質(zhì)量檢測儀器的現(xiàn)狀,設(shè)計了基于ARM核微控制器的電能質(zhì)量檢測裝置的硬件系統(tǒng),主要工作為對電能質(zhì)量檢測裝置硬件系統(tǒng)的設(shè)計與實現(xiàn)及對整個系統(tǒng)的調(diào)試和改進。 首先,本文依據(jù)我國電能質(zhì)量標準和IEC標準歸納總結(jié)了電能質(zhì)量參數(shù)的含義、特性和相關(guān)指標,接著介紹了各個參數(shù)的測量模型及其測量原理,對通常使用的軟件同步采樣方式進行了改進,還對測量通道間的相位不匹配問題進行了研究,提出本文保證線性相位和進行通道間相位補償?shù)慕鉀Q方案。其次詳細設(shè)計了基于ARM的電能檢測裝置的硬件系統(tǒng),主要包括信號調(diào)理模塊、基于AD7606的模數(shù)轉(zhuǎn)換模塊、基于S3C2440的核心處理模塊、系統(tǒng)供電模塊。最后對硬件電路和整個系統(tǒng)進行了實際電網(wǎng)測試,對實驗結(jié)果進行了分析,提出了改進意見。 實驗表明,本裝置基本實現(xiàn)了電能質(zhì)量各參數(shù)的測量功能和擁有很高的測量精度,主要包括對電網(wǎng)頻率、電壓/電流有效值、諧波含量、總諧波失真度、三相電壓不平衡度的測量,電壓和頻率的精度分別為±0.5%,±0.01Hz。高次諧波的測量精度有待改進。
[Abstract]:In recent years, great changes have taken place in the modern power network and its load composition. A large number of power electronic equipment have been put into use. Such nonlinear and impact loads have made the power network produce such as voltage disturbance and voltage waveform distortion. Power quality problems such as flicker and harmonics. At the same time, sensitive equipments, such as electronic instruments and automation equipments, which are more and more widely used, require more and more high power quality. In view of the increasingly serious problems of power quality and the increasing demand for power quality of electric equipment, it is of great significance to study and design a high performance power quality detecting device for monitoring and analyzing power quality of power grid. According to the current situation of domestic and foreign power quality testing instruments, the hardware system of power quality detection device based on ARM nuclear microcontroller is designed in this paper. The main work is to design and implement the hardware system of the power quality detection device and to debug and improve the whole system. Firstly, according to the power quality standard and IEC standard of our country, this paper summarizes the meaning, characteristic and related index of the power quality parameter, then introduces the measuring model of each parameter and its measuring principle. The software synchronization sampling method is improved and the phase mismatch between the measuring channels is studied. The solution to ensure linear phase and phase compensation between channels is proposed in this paper. Secondly, the hardware system of the power detection device based on ARM is designed in detail, including signal conditioning module, analog-to-digital conversion module based on AD7606, core processing module based on S3C2440 and power supply module of the system. Finally, the hardware circuit and the whole system are tested, the experimental results are analyzed, and the improvement suggestions are put forward. The experimental results show that the device basically achieves the function of measuring the parameters of power quality and has a high measuring accuracy, mainly including the frequency of the power network, the effective value of voltage / current, the harmonic content, the total harmonic distortion, and so on. The accuracy of measurement of unbalance of three-phase voltage, voltage and frequency is 鹵0.5 and 鹵0.01 Hz, respectively. The measurement accuracy of high order harmonics needs to be improved.
【學位授予單位】：電子科技大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：TM761;TP368.12

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