本文關(guān)鍵詞： 配電網(wǎng)線路 接地故障 故障定位 狀態(tài)監(jiān)測　出處：《山東大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：配電線路是聯(lián)絡(luò)電網(wǎng)與用戶的橋梁,也是決定用戶供電質(zhì)量和供電可靠性的重要環(huán)節(jié)。隨著配網(wǎng)自動(dòng)化技術(shù)的應(yīng)用與成熟,當(dāng)發(fā)生配電網(wǎng)速斷故障時(shí),主站可以通過配網(wǎng)自動(dòng)化終端上傳的數(shù)據(jù)進(jìn)行分析,確定故障區(qū)段并采用隔離措施,但配網(wǎng)自動(dòng)化發(fā)展仍存在發(fā)展不全面、網(wǎng)架規(guī)劃不合理等問題。在我國,配電網(wǎng)中性點(diǎn)主要采取非有效接地方式,一旦出現(xiàn)接地故障,故障準(zhǔn)確定位存在一定的困難,不僅延長了故障處理時(shí)間,也增加了運(yùn)維人員的工作負(fù)擔(dān)。本文針對查找配網(wǎng)架空線路故障點(diǎn)困難的問題,通過研究狀態(tài)監(jiān)測系統(tǒng),幫助運(yùn)維人員及時(shí)了解配網(wǎng)故障狀態(tài),快速準(zhǔn)確的判斷故障,特別是接地故障的線路選擇,具體做了以下幾方面的工作:首先,對配電網(wǎng)的中性點(diǎn)接地方式及現(xiàn)有小電流接地系統(tǒng)的接地選線方法作了研究。目前我國配電網(wǎng)主要為中性點(diǎn)不接地或經(jīng)消弧線圈接地,現(xiàn)有的接地選線方法各有優(yōu)缺點(diǎn)且無法保證選線正確率100%。其次,對智能化配網(wǎng)線路狀態(tài)監(jiān)測系統(tǒng)進(jìn)行了研究。分別從狀態(tài)監(jiān)測系統(tǒng)功能需求、功能實(shí)現(xiàn)原理、系統(tǒng)設(shè)計(jì)與實(shí)現(xiàn)進(jìn)行了研究,通過對傳統(tǒng)故障指示器原理及配網(wǎng)自動(dòng)化系統(tǒng)進(jìn)行結(jié)合、改造,并利用人工神經(jīng)網(wǎng)絡(luò)方法判斷系統(tǒng)接地,給出了智能化配網(wǎng)線路狀態(tài)監(jiān)測系統(tǒng)具體實(shí)施方案。再次,將智能化配網(wǎng)線路狀態(tài)監(jiān)測系統(tǒng)在日照地區(qū)進(jìn)行了實(shí)際應(yīng)用,通過實(shí)際案例驗(yàn)證了狀態(tài)監(jiān)測系統(tǒng)的有效性。從經(jīng)濟(jì)效益來看,監(jiān)測系統(tǒng)可以快速定位故障,減少了停電時(shí)間及范圍,減輕了配網(wǎng)運(yùn)維單位的人力、物力,提高了電力企業(yè)效益;從社會(huì)效益來看,進(jìn)一步縮短停電時(shí)間,樹立了電力企業(yè)高效、負(fù)責(zé)的形象。最后,對本文進(jìn)行了總結(jié)同時(shí)對智能化配網(wǎng)線路狀態(tài)監(jiān)測系統(tǒng)進(jìn)行了展望。
[Abstract]:Distribution line is a bridge between power network and users, and also an important link to determine the quality and reliability of power supply. With the application and maturity of distribution automation technology, when the distribution network speed failure occurs. The main station can analyze the data uploaded by the distribution automation terminal, determine the fault section and adopt isolation measures, but the development of distribution automation still has some problems, such as incomplete development and unreasonable planning of grid. The neutral point of distribution network mainly adopts the non-effective grounding mode. Once there is a grounding fault, there are some difficulties in the accurate location of the fault, which not only prolongs the processing time of the fault. This paper aims at the difficult problem of finding fault point of distribution network overhead line, through studying the condition monitoring system, it helps the operator to understand the fault state of distribution network in time. Quickly and accurately judge the fault, especially the line selection of the grounding fault, and do the following work: first of all. The neutral grounding mode of distribution network and the grounding selection method of existing small current grounding system are studied. At present, the distribution network in China is mainly neutral ungrounded or grounded by arc-suppression coil. The existing grounding line selection methods have advantages and disadvantages and can not guarantee the accuracy of line selection 100. Secondly, the intelligent distribution network line condition monitoring system is studied, respectively from the functional requirements of the status monitoring system. The principle of function realization, system design and implementation are studied. The traditional fault indicator principle and distribution automation system are combined and reformed, and the artificial neural network method is used to judge the grounding of the system. The implementation scheme of intelligent distribution line condition monitoring system is given. Thirdly, the intelligent distribution line condition monitoring system is applied in Rizhao area. From the economic benefit, the monitoring system can quickly locate the fault, reduce the time and scope of power outage, and reduce the manpower and material resources of the distribution network operation and maintenance unit. The efficiency of electric power enterprises is improved; From the point of view of social benefits, it further shortens the blackout time and sets up the image of high efficiency and responsibility of electric power enterprises. Finally, the paper summarizes the situation monitoring system of intelligent distribution network line.
【學(xué)位授予單位】：山東大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM75

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