【摘要】：智能化變電站的高速發(fā)展帶來了控制終端智能化、安裝位置就近化等一系列革新,同時(shí)也導(dǎo)致了二次系統(tǒng)電子設(shè)備愈加的靠近一次系統(tǒng),進(jìn)而使得其直接面對(duì)更加復(fù)雜惡劣的電磁環(huán)境。在這一新形勢(shì)下,完善對(duì)干擾信號(hào)的檢測(cè)與記錄手段,分析并評(píng)價(jià)其對(duì)二次設(shè)備的影響程度具有重要的意義和價(jià)值。然而,現(xiàn)有的瞬態(tài)磁場檢測(cè)設(shè)備普遍在性能及功能上存在不足,難以達(dá)到目的。為此,本項(xiàng)目針對(duì)磁干擾研究開發(fā)了一套手持式瞬態(tài)磁場記錄儀及其軟件系統(tǒng),而本文所做的工作集中在儀器數(shù)字系統(tǒng)與軟件系統(tǒng)的設(shè)計(jì)與實(shí)現(xiàn),在系統(tǒng)硬件平臺(tái)下,開發(fā)了基于FPGA的數(shù)字系統(tǒng)與基于ARM的軟件系統(tǒng),該系統(tǒng)能對(duì)10Hz~5MHz的磁場進(jìn)行測(cè)量、記錄、示波以及分析,經(jīng)實(shí)驗(yàn)測(cè)試能夠響應(yīng)瞬態(tài)磁脈沖,且具備現(xiàn)場測(cè)試的性能。本文設(shè)計(jì)與實(shí)現(xiàn)的主要內(nèi)容如下:一、考察了變電站電磁干擾的特征,確定了對(duì)瞬態(tài)磁場的測(cè)量方案,分析了瞬態(tài)磁場對(duì)二次設(shè)備干擾的量化原理,給出了瞬態(tài)磁場干擾度的計(jì)算方法;二、在儀器的硬件平臺(tái)上,利用數(shù)字邏輯設(shè)計(jì)工具及Matlab等仿真軟件,設(shè)計(jì)并實(shí)現(xiàn)了采集與帶寬控制,DDR2緩存與波形處理,觸發(fā)與GPS控制以及總線與系統(tǒng)控制等數(shù)字邏輯模塊,并使用靜態(tài)時(shí)序分析工具,對(duì)關(guān)鍵路徑施加約束,保證了系統(tǒng)的頻率性能。三、在雙ARM微處理器系統(tǒng)上,開發(fā)了儀器的嵌入式軟件部分,包括外設(shè)配置與底層驅(qū)動(dòng),數(shù)字系統(tǒng)流程控制,波形測(cè)量與實(shí)時(shí)顯示,SD卡存儲(chǔ)與回讀等功能模塊;同時(shí),還實(shí)現(xiàn)了在ARM上對(duì)瞬態(tài)磁干擾的干擾度計(jì)算。四、儀器開發(fā)完成后,先在實(shí)驗(yàn)室完成了瞬態(tài)磁脈沖的測(cè)試分析,驗(yàn)證儀器在功能及性能能夠滿足變電站現(xiàn)場實(shí)測(cè),后于西昌換流站進(jìn)行了現(xiàn)場測(cè)試。
[Abstract]:The rapid development of intelligent substation has brought about a series of innovations such as intelligent control terminal, proximity of installation position, and so on. At the same time, it has also led to the electronic equipment of secondary system getting closer to the primary system. So that it directly faces the more complex and harsh electromagnetic environment. In this new situation, it is of great significance and value to improve the means of detecting and recording interference signals, and to analyze and evaluate their influence on secondary equipment. However, the existing transient magnetic field detection equipment generally has shortcomings in performance and function, so it is difficult to achieve the purpose. Therefore, a hand-held transient magnetic field recorder and its software system are developed in this project. The work in this paper is focused on the design and implementation of the instrument digital system and the software system, and on the hardware platform of the system. The digital system based on FPGA and the software system based on ARM are developed. The system can measure, record, oscillograph and analyze the magnetic field of 10Hz~5MHz. The main contents of this paper are as follows: first, the characteristics of electromagnetic interference in substation are investigated, the measurement scheme of transient magnetic field is determined, and the quantization principle of the interference of transient magnetic field to secondary equipment is analyzed. The calculation method of the interference degree of transient magnetic field is given. Secondly, on the hardware platform of the instrument, the acquisition and bandwidth control of DDR2 buffer and waveform processing are designed and realized by using digital logic design tools and simulation software such as Matlab. The digital logic modules such as trigger and GPS control, bus and system control, and static timing analysis tools are used to impose constraints on critical paths to ensure the frequency performance of the system. Thirdly, the embedded software of the instrument is developed on the dual ARM microprocessor system, including peripheral configuration and bottom drive, digital system flow control, waveform measurement and real-time display SD card storage and read back module, etc. The interference degree of transient magnetic interference on ARM is also calculated. 4. After the development of the instrument, the test and analysis of the transient magnetic pulse are completed in the laboratory, and the function and performance of the instrument can meet the field measurement of the substation, and then the field test is carried out at Xichang converter station.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM936

【參考文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 李福超;瞬態(tài)磁場測(cè)量儀硬件設(shè)計(jì)與實(shí)現(xiàn)[D];電子科技大學(xué);2012年

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本文編號(hào)：2202930