【摘要】：近年來，電能質(zhì)量問題逐漸引起電力部門與用戶的關注和重視。一方面，隨著大量沖擊性、不對稱和整流型非線性負載越來越多投運到電網(wǎng)中，使得電網(wǎng)諧波、電壓波動和三相不平衡等電能質(zhì)量問題愈加嚴重。另一方面，電能質(zhì)量問題不僅威脅到電網(wǎng)本身的安全性，還對眾多精密電力電子設備造成了嚴重的危害。因此，實時而準確地監(jiān)測電能質(zhì)量對于綜合治理和改善電網(wǎng)質(zhì)量有著重要的意義。 本文通過分析電能質(zhì)量在國內(nèi)外研究現(xiàn)狀及發(fā)展趨勢，以最新修訂的電能質(zhì)量國家標準為基準，開發(fā)了一種基于嵌入式系統(tǒng)的電能質(zhì)量監(jiān)測裝置。本裝置以DSP和ARM為雙CPU，充分發(fā)揮了DSP的信號處理能力和ARM的系統(tǒng)控制能力。設計并實現(xiàn)了信號調(diào)理電路、AD采集轉換模塊、DSP與ARM之間的通信以及圖像顯示電路等。通過對六項電能質(zhì)量國家標準的闡述和深入研究，以基于快速傅里葉變換電能質(zhì)量分析算法為核心，實現(xiàn)了基本交流電參量、頻率偏差、電壓偏差以及2~50次諧波等電能質(zhì)量參數(shù)的測量。設計中各種算法是在Code Composer Studio(CCS)集成開發(fā)環(huán)境下，利用C語言和匯編語言混合編程來完成編寫、調(diào)試以及實驗。最后，以嵌入式Linux操作系統(tǒng)為軟件平臺，使用Qt/Embedded軟件為開發(fā)工具，采用軟硬件協(xié)同設計的方法，實現(xiàn)了嵌入式人機界面的開發(fā)。 通過對電能質(zhì)量監(jiān)測裝置進行調(diào)試和實驗，，驗證了設計方案的可行性以及算法的正確性。電能質(zhì)量監(jiān)測裝置具有良好的實時性、準確性、穩(wěn)定性、擴展性，可實現(xiàn)電能質(zhì)量監(jiān)測的網(wǎng)絡化和智能化，對改善電網(wǎng)電能質(zhì)量和制定有關治理措施提供了必要的依據(jù)。最后，對論文進行了工作總結，提出了有待進一步解決的若干問題。
[Abstract]:In recent years, the problem of power quality has gradually aroused the attention and attention of power departments and users. On the one hand, power quality problems such as harmonic, voltage fluctuation and three-phase imbalance are becoming more and more serious as a result of a large number of shocks, asymmetrical and rectifier nonlinear loads being put into the power grid more and more. On the other hand, power quality problems not only threaten the security of power grid itself, but also cause serious harm to many precision power electronic equipment. Therefore, real-time and accurate monitoring of power quality is of great significance for comprehensive management and improvement of power quality. Based on the analysis of the current research situation and development trend of power quality at home and abroad, a power quality monitoring device based on embedded system is developed based on the newly revised national power quality standard. This device takes DSP and ARM as the double CPU, to give full play to the signal processing ability of DSP and the system control ability of ARM. The signal conditioning circuit, AD acquisition and conversion module, communication between DSP and ARM, and image display circuit are designed and implemented. Based on the analysis algorithm of power quality based on Fast Fourier transform (FFT), the basic AC electric parameters and frequency deviation are realized through the elaboration and in-depth study of six national power quality standards. Measurement of power quality parameters such as voltage deviation and 2 / 50 harmonics. All kinds of algorithms in the design are programmed, debugged and experimented using C language and assembly language in Code Composer Studio (CCS) integrated development environment. Finally, the embedded Linux operating system is used as the software platform, the Qt/Embedded software is used as the development tool, and the hardware and software co-design method is adopted to realize the development of the embedded man-machine interface. The feasibility of the design and the correctness of the algorithm are verified by debugging and experiment of the power quality monitoring device. The power quality monitoring device has good real-time, accuracy, stability and expansibility. It can realize the network and intelligence of the power quality monitoring. It provides the necessary basis for improving the power quality of the power network and formulating the relevant control measures. Finally, the work of the paper is summarized, and some problems to be solved are put forward.
【學位授予單位】：燕山大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：TM76;TP368.1

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