【摘要】：為保障工業(yè)生產(chǎn)以及人民生活的正常進(jìn)行,當(dāng)配電網(wǎng)突發(fā)故障時(shí),電力工作人員應(yīng)及時(shí)查明故障原因,確定故障點(diǎn)位置,并在第一時(shí)間進(jìn)行搶修將故障排除。為快速的幫助維修人員找到接地故障點(diǎn),采取基于相位法的配電網(wǎng)單相接地故障在線定位的方式。由于故障發(fā)生時(shí),故障點(diǎn)前后位置的零序電流的相位將由同相變?yōu)榉聪?因此本設(shè)計(jì)主要思路為,在線路端采用本設(shè)計(jì)進(jìn)行信息采集,其中包括三相電流采集及三相電流相位值的計(jì)算,將電流數(shù)值相疊加即為零序電流,并采用無線傳輸方式將數(shù)據(jù)傳輸至總機(jī),在總機(jī)處對(duì)具體故障點(diǎn)位置進(jìn)行判斷。相位法在進(jìn)行故障定位上是常采用的定位方式。本文通過對(duì)比多種判別方法的優(yōu)缺點(diǎn),最后確定采用相位法,采用Matlab軟件中的Simulink模塊搭建傳輸線路,并將線路中可能出現(xiàn)的故障類型進(jìn)行仿真模擬,得到每種故障出現(xiàn)的三相電壓、電流及零序電流波形,可明確看出故障出現(xiàn)后零序電流反相,進(jìn)一步驗(yàn)證了判別零序電流相位法可應(yīng)用于故障點(diǎn)的定位。根據(jù)該方法可行性,本文設(shè)計(jì)了電流采集及單片機(jī)數(shù)據(jù)處理存儲(chǔ)系統(tǒng)。其中包括電流采集模塊、信號(hào)處理模塊、GPS模塊、無線收發(fā)模塊以及單片機(jī)的軟件設(shè)計(jì),本設(shè)計(jì)采用電流互感線圈實(shí)現(xiàn)三相電流信息的采集,采集后的信號(hào)通過信號(hào)處理模塊進(jìn)行整形濾波,其中包括濾波電路、放大電路及微處理器;其后借助單片機(jī)內(nèi)部的10位模數(shù)轉(zhuǎn)換器實(shí)現(xiàn)模擬信號(hào)轉(zhuǎn)數(shù)字信號(hào),并通過所設(shè)計(jì)的單片機(jī)程序?qū)?shù)據(jù)整合處理,其中借助GPS秒脈沖實(shí)現(xiàn)快速相位值計(jì)算的方式;最后采用無線傳輸來完成電流數(shù)據(jù)信息的遠(yuǎn)程傳輸工作,并在總站中對(duì)傳輸信息進(jìn)行處理來判斷故障點(diǎn)具體線路位置。本文對(duì)配電網(wǎng)故障定位系統(tǒng)進(jìn)行測試,包括各模塊的分開測試和零序電流采集終端的整體測試,給出具體測試結(jié)果,驗(yàn)證配電網(wǎng)故障定位系統(tǒng)工作的可靠性。在故障點(diǎn)前后兩處進(jìn)行實(shí)時(shí)采集得到三相限流IA、IB、IC以及零序電流I0,故障點(diǎn)前后共采集2組數(shù)據(jù),對(duì)數(shù)據(jù)進(jìn)行處理得到兩點(diǎn)的零序電流相位圖并將兩者進(jìn)行比較,故障點(diǎn)前后零序電流的幅值明顯增大,并且兩者相位差大致為180°。由此確定模擬配電線路的故障點(diǎn)在采集點(diǎn)A與采集點(diǎn)B之間,與本文理論依據(jù)相符合,進(jìn)而驗(yàn)證此故障點(diǎn)定位系統(tǒng)的準(zhǔn)確性。
[Abstract]:In order to ensure the industrial production and the normal life of the people, when the distribution network breaks out, the electric power workers should find out the cause of the fault in time, determine the location of the fault point, and fix the fault in the first time. In order to help the maintainers find the grounding fault point quickly, the method of phase method based on phase method is adopted to locate the single-phase grounding fault online. When the fault occurs, the phase of the zero-sequence current before and after the fault point will change from the same phase to the inverse phase, so the main idea of this design is to use the design to collect information at the online end. It includes three phase current acquisition and calculation of phase value of three phase current. When the value of current is superimposed as zero sequence current, the data is transmitted to the switchboard by wireless transmission mode, and the location of the specific fault point is judged at the switchboard. Phase method is often used in fault location. By comparing the advantages and disadvantages of many discriminant methods, this paper determines to use phase method, Simulink module in Matlab software to build transmission line, and simulate the possible fault types in the line. The waveforms of three-phase voltage, current and zero-sequence current of each fault are obtained, and the inverse phase of zero-sequence current after the fault appears can be clearly seen, which further verifies that the phase method of discriminating zero-sequence current can be applied to the location of fault point. According to the feasibility of this method, this paper designs the current acquisition and data processing storage system. It includes the software design of current acquisition module, signal processing module, GPS module, wireless transceiver module and single chip microcomputer. The design adopts current mutual inductance coil to collect three-phase current information. The collected signal is filtered by signal processing module, which includes filter circuit, amplifier circuit and microprocessor. Then the analog signal is converted to digital signal with the help of 10 bits A / D converter, and the data is integrated and processed by the single chip microcomputer program, in which the fast phase value calculation is realized by GPS second pulse. Finally, wireless transmission is used to complete the remote transmission of current data information, and the transmission information is processed in the terminal station to judge the location of the specific line at the fault point. In this paper, the fault location system of distribution network is tested, including the separate test of each module and the whole test of zero-sequence current acquisition terminal. The concrete test results are given to verify the reliability of the fault location system in distribution network. The three-phase current-limiting IA,IB,IC and zero-sequence current I _ 0 are collected in real time before and after the fault point, and two groups of data are collected before and after the fault point, and the zero-sequence current phase diagram of two points is obtained by processing the data and comparing them. The amplitude of zero-sequence current increases obviously before and after the fault point, and the phase difference between them is about 180 擄. Therefore, the fault point of analog distribution line is between the acquisition point A and the acquisition point B, which is in accordance with the theoretical basis of this paper, and then verifies the accuracy of the fault point location system.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM755

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 戴永正;陳海舫;趙金榮;馮侃;袁鵬程;顧宇鋒;;智能農(nóng)網(wǎng)配電終端裝置的設(shè)計(jì)與研究[J];電工電氣;2014年09期

2 張宏奎;楊益新;李志偉;;水下GPS定位誤差分析[J];電子設(shè)計(jì)工程;2013年11期

3 張俊嶺;塔曉龍;鄧銳;;基于改進(jìn)信號(hào)注入配電網(wǎng)單相接地故障定位研究[J];黑龍江電力;2012年06期

4 王新義;高連義;尹明;王建榮;;傳輸型立體測繪衛(wèi)星定位誤差分析與評(píng)估[J];測繪科學(xué)技術(shù)學(xué)報(bào);2012年06期

5 張欣;李寶蘭;曹盛;;配電網(wǎng)直流定位法探測器的研究與實(shí)現(xiàn)[J];電子科技;2012年11期

6 李科蕾;;具有GPS時(shí)鐘電路的數(shù)據(jù)集中器研究[J];自動(dòng)化儀表;2012年08期

7 何首賢;郝英軍;姜全錄;;基于66kV及以下電網(wǎng)的相位與相序的研究[J];長春大學(xué)學(xué)報(bào);2012年06期

8 王毅;趙建軍;付龍文;孫西艷;陳令新;;基于時(shí)間序列的GPS定位誤差分析[J];現(xiàn)代科學(xué)儀器;2012年02期

9 熊蘭;何友忠;宋道軍;劉勇;何為;張占龍;;輸變電線路在線監(jiān)測設(shè)備供電電源的設(shè)計(jì)[J];高電壓技術(shù);2010年09期

10 張利;夏楠;姜彤;;中性點(diǎn)不接地系統(tǒng)單相接地故障的定位方法[J];電力系統(tǒng)及其自動(dòng)化學(xué)報(bào);2010年04期

相關(guān)碩士學(xué)位論文 前7條

1 楊炎龍;配電網(wǎng)故障定位研究[D];華南理工大學(xué);2013年

2 溫正陽;相位法故障定位中通信協(xié)議及定位算法的研究[D];華北電力大學(xué);2013年

3 郭玉會(huì);相位法故障定位中零序電流的計(jì)算[D];華北電力大學(xué);2013年

4 吳剛;配電網(wǎng)單相接地故障的區(qū)間定位和測距[D];三峽大學(xué);2012年

5 冀魯豫;復(fù)雜配電網(wǎng)故障定位方法研究[D];北京交通大學(xué);2011年

6 魏文彬;基于FFT的配電網(wǎng)單相接地故障定位研究與實(shí)現(xiàn)[D];華北電力大學(xué);2011年

7 孫福生;諧振接地系統(tǒng)小電流接地故障選線技術(shù)評(píng)價(jià)體系及分析[D];山東大學(xué);2010年

，

本文編號(hào)：2375449