發(fā)布時間：2018-04-04 11:01

  本文選題：諧波檢測　切入點：DSP　出處：《南京理工大學》2015年碩士論文

【摘要】：隨著電力電子設備以及非線性負載的廣泛使用,電網(wǎng)諧波污染問題日趨惡化,嚴重影響了電力系統(tǒng)的供電可靠性。為了保證供電系統(tǒng)能夠安全經(jīng)濟地運行,對諧波進行實時檢測和分析具有非常重要的意義。本論文主要對諧波測量的相關理論與技術進行分析和研究,設計并實現(xiàn)了基于DSP和ARM的諧波檢測系統(tǒng)。本文首先研究基于準同步采樣的諧波檢測方法,該方法具有實時性高,且無需額外硬件同步電路的優(yōu)點,節(jié)約了硬件成本,提高了測量準確性。其次提出了基于濾波器組的頻率實時檢測方案以及基于插值算法的準同步采樣方法,并對該方法進行了仿真,以驗證其準確性和有效性。然后完成了諧波檢測系統(tǒng)的軟、硬件設計：主要工作內容包括數(shù)據(jù)采集模塊、DSP模塊和ARM模塊及其周邊電路的硬件設計,以及基于DSP和ARM芯片的軟件設計。最后完成了系統(tǒng)調試和功能驗證。經(jīng)過在實驗室內的反復測試,本系統(tǒng)能夠長時間穩(wěn)定運行,且具有較高的測量精度和實時性,能夠提供很好的分析數(shù)據(jù),滿足電力系統(tǒng)中諧波檢測的要求。
[Abstract]:With the wide use of power electronic equipment and nonlinear load, the problem of harmonic pollution in power network is worsening day by day, which seriously affects the power supply reliability of power system.In order to ensure the safe and economical operation of power supply system, it is very important to detect and analyze harmonics in real time.In this paper, the theory and technology of harmonic measurement are analyzed and studied, and the harmonic detection system based on DSP and ARM is designed and implemented.This paper first studies the harmonic detection method based on quasi-synchronous sampling. The method has the advantages of high real-time performance and no extra hardware synchronization circuit. It saves the cost of hardware and improves the accuracy of measurement.Secondly, the frequency real-time detection scheme based on filter banks and the quasi-synchronous sampling method based on interpolation algorithm are proposed, and the simulation results are given to verify its accuracy and effectiveness.Then the software and hardware design of harmonic detection system is completed. The main work includes the hardware design of data acquisition module ARM module and its peripheral circuit as well as the software design based on DSP and ARM chip.Finally, the system debugging and function verification are completed.After repeated tests in the laboratory, the system can run stably for a long time, and has high measurement accuracy and real-time performance. It can provide good analysis data and meet the requirements of harmonic detection in power system.
【學位授予單位】：南京理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TM935

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本文編號：1709667