本文選題：智能變電站　切入點(diǎn)：ARM　出處：《安徽理工大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：電能在當(dāng)今社會(huì)發(fā)展的中至關(guān)重要,作為各行各業(yè)的直接驅(qū)動(dòng)力,電能的安全、穩(wěn)定傳輸與國(guó)民經(jīng)濟(jì)和社會(huì)發(fā)展息息相關(guān),因此智能電網(wǎng)以及智能變電站的建設(shè)已成為必然趨勢(shì)。變電站繼電保護(hù)系統(tǒng)的可靠性直接關(guān)系了電能供應(yīng),因而進(jìn)行基于ARM的智能變電站的繼電保護(hù)技術(shù)的研究具有重要的現(xiàn)實(shí)意義。本文分析了變電站輸電線路配置的縱聯(lián)差動(dòng)保護(hù)、斷路器失靈保護(hù)、重合閘保護(hù)原理;介紹了智能變電站繼電保護(hù)系統(tǒng)的特征,并對(duì)比傳統(tǒng)變電站結(jié)構(gòu),提出了智能變電站繼電保護(hù)技術(shù)應(yīng)用的三點(diǎn)關(guān)鍵性特征,即智能保護(hù)裝置、電子互感器、全站網(wǎng)絡(luò)通信的應(yīng)用。為體現(xiàn)智能化優(yōu)勢(shì),本文對(duì)系統(tǒng)內(nèi)保護(hù)裝置進(jìn)行了設(shè)計(jì),在硬件方面按照模塊化理念,基于ARM9系列的AT91SAM9261芯片對(duì)保護(hù)模塊、開(kāi)關(guān)量輸入/輸出模塊、通信模塊、人機(jī)交互模塊等硬件電路進(jìn)行了設(shè)計(jì);電子互感器代替電磁互感器進(jìn)行數(shù)據(jù)采集并直接向保護(hù)裝置傳輸數(shù)字信號(hào)也是智能變電站繼電保護(hù)系統(tǒng)的重要特征,因此針對(duì)常規(guī)的電容分壓式電子互感器存在的電磁干擾、溫度漂移、暫態(tài)穩(wěn)定性等問(wèn)題,本文對(duì)分壓式電子互感器硬件原理上提出了一種改進(jìn)方案,即通過(guò)直接測(cè)量高壓電容電流量計(jì)算二次側(cè)低壓信號(hào),并通過(guò)數(shù)據(jù)計(jì)算及仿真波形驗(yàn)證其各項(xiàng)性能。軟件設(shè)計(jì)方面根據(jù)總體結(jié)構(gòu)圖展開(kāi),對(duì)主程序及各中斷子程序進(jìn)行設(shè)計(jì);考慮到變電站內(nèi)高壓線路發(fā)生故障后的暫態(tài)過(guò)程中故障電壓、電流有豐富的暫態(tài)噪聲,影響保護(hù)準(zhǔn)確性。本文通過(guò)對(duì)比傳統(tǒng)全波傅立葉算法、半波傅立葉算法的頻率響應(yīng),提出將卡爾曼算法應(yīng)用于輸電線路的保護(hù)算法中,通過(guò)搭建接地故障仿真模型,對(duì)故障電流的基波幅值進(jìn)行估計(jì),結(jié)果表明卡爾曼算法濾波效果更好。全站通信網(wǎng)絡(luò)傳輸是變電站智能化的一個(gè)標(biāo)志,通過(guò)對(duì)EPON技術(shù)傳輸原理及網(wǎng)絡(luò)協(xié)議的分析,提出用該技術(shù)實(shí)現(xiàn)保護(hù)系統(tǒng)采樣數(shù)據(jù)及控制命令的傳輸,并對(duì)全站網(wǎng)絡(luò)通信進(jìn)行拓?fù)浣M網(wǎng)。
[Abstract]:As a direct driving force of various industries, the safety and stable transmission of electric energy is closely related to the national economy and social development. Therefore, the construction of smart grid and intelligent substation has become an inevitable trend. The reliability of substation relay protection system is directly related to the power supply. Therefore, it is of great practical significance to study the relay protection technology of intelligent substation based on ARM. The principle of longitudinal differential protection, circuit breaker failure protection and reclosing protection of substation transmission line configuration is analyzed in this paper. This paper introduces the characteristics of intelligent substation relay protection system, compares with the traditional substation structure, and puts forward three key features of intelligent substation relay protection technology application, that is, intelligent protection device, electronic transformer, etc. The application of network communication in the whole station. In order to reflect the advantage of intelligence, the protection device in the system is designed in this paper. According to the modularization concept of hardware, the AT91SAM9261 chip based on ARM9 series is used to protect the module and the switch quantity input / output module. The communication module, man-machine interaction module and other hardware circuits are designed, the electronic transformer replaces the electromagnetic transformer to collect data and transmit the digital signal directly to the protection device, which is also an important feature of the intelligent substation relay protection system. Therefore, in order to solve the problems of electromagnetic interference, temperature drift, transient stability and so on, this paper proposes an improved scheme for the hardware principle of split voltage electronic transformer. That is to calculate the secondary low voltage signal by measuring the current of the high voltage capacitor directly, and verify its performance by data calculation and simulation waveform. The software design is based on the overall structure diagram, the main program and the interrupt subprogram are designed. Considering that the fault voltage and current have abundant transient noise in the transient process after the fault of the high voltage line in the substation, this paper compares the frequency response of the traditional full-wave Fourier algorithm and the half-wave Fourier algorithm. In this paper, the Kalman algorithm is applied to the protection algorithm of transmission line, and the fundamental amplitude of fault current is estimated by setting up the simulation model of grounding fault. The results show that the Kalman algorithm has better filtering effect. The whole station communication network transmission is a symbol of substation intelligence. Through the analysis of EPON technology transmission principle and network protocol, This technology is used to realize the transmission of sampling data and control commands of the protection system, and the network topology of the whole station communication is carried out.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM63;TM77

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本文編號(hào)：1605958