【摘要】：近年來,隨著大量非線性、沖擊性負荷的投入,諧波、電壓暫降等電能質量問題給電力用戶帶來了巨大的經濟損失,也給供電部門保障電能質量帶來了更嚴峻的考驗。高質量的電能對于保證電網和電氣設備安全、經濟運行,提高產品質量和保障居民正常生活有著重要的意義。本文針對當前已經頒布國家標準的電能質量問題,結合國內外有關電能質量指標檢測的理論和成果,綜合現(xiàn)有電能質量檢測裝置的優(yōu)缺點,設計了電能質量監(jiān)測記錄裝置。論文結構如下:文章首先歸納總結了電能質量的概念、分類及產生的原因、國內外標準和電能質量檢測等主要問題,對比分析了當前各類電能質量檢測儀器存在的問題。并根據國家標準介紹了各項電能質量問題的概念和指標構成,結合IEC標準給出了電能質量的檢測分析方法,研究歸納了電能質量各項檢測指標的計算方法,為電能質量檢測裝置的的設計提供了理論依據和算法指導。硬件方面,結合設計目標和GB/T 19862-2005《電能質量監(jiān)測設備通用要求》,確定了電能質量監(jiān)測記錄裝置的系統(tǒng)結構,設計了以32位浮點型DSP TMS320F28335為處理器核心的硬件電路,主要包括電壓電流傳感器單元、頻率檢測與同步采樣電路單元、模數(shù)轉換單元、處理器單元、時鐘單元、以太網控制器、USB2.0控制器、存儲單元和無線傳輸單元等。軟件方面,在CCS v4.12 DSP程序開發(fā)環(huán)境下采用C語言開發(fā)了DSP控制計算程序,文中重點介紹了DSP主程序、采樣子程序、同步信號異常中斷子程序、SCI接收中斷子程序、以太網控制器初始化子程序和USB控制器程序等。實驗測試結果驗證了設計方案的合理性。系統(tǒng)的各項功能和指標達到了設計目標。
[Abstract]:In recent years, with a large number of nonlinear, impact load input, harmonics, voltage sag and other power quality problems have brought huge economic losses to power users, but also to the power supply department to ensure power quality has brought a more severe test. High quality electric energy is of great significance to ensure the safety and economic operation of power grid and electrical equipment, improve product quality and ensure the normal life of residents. In order to solve the problem of power quality which has been promulgated at present, combined with the theory and results of power quality index detection at home and abroad, and combining the advantages and disadvantages of the existing power quality detection devices, a power quality monitoring and recording device is designed in this paper. The structure of the paper is as follows: firstly, the concept, classification and causes of power quality, domestic and foreign standards and power quality detection are summarized, and the existing problems of all kinds of power quality detection instruments are compared and analyzed. According to the national standard, the concept and index composition of each power quality problem are introduced, the detection and analysis method of power quality is given according to IEC standard, and the calculation method of power quality detection index is studied and summarized. It provides theoretical basis and algorithm guidance for the design of power quality detection device. In the aspect of hardware, combined with the design goal and GB/T 19862 / 2005 "General requirements of Power quality Monitoring equipment", the system structure of power quality monitoring and recording device is determined, and the hardware circuit with 32-bit floating point DSP TMS320F28335 as the processor core is designed. It mainly includes voltage and current sensor unit, frequency detection and synchronous sampling circuit unit, analog-to-digital conversion unit, processor unit, clock unit, Ethernet controller, USB2.0 controller, memory unit and wireless transmission unit. In the aspect of software, the DSP control calculation program is developed with C language under the environment of CCS v4.12 DSP program development. This paper focuses on the main program of DSP, the sampling program, the abnormal interrupt subroutine of synchronous signal, and the interrupt subroutine received by SCI. Ethernet controller initialization subroutine and USB controller program and so on. The experimental results verify the rationality of the design scheme. The functions and indicators of the system have achieved the design objectives.
【學位授予單位】：鄭州大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM933.4

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本文編號：2493143