本文關(guān)鍵詞：帶電作業(yè)時(shí)同塔四回輸電線路電場(chǎng)仿真分析　出處：《長(zhǎng)沙理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 同塔多回輸電線路 帶電作業(yè) 電磁感應(yīng) 靜電感應(yīng) 作業(yè)人員體表場(chǎng)強(qiáng)

【摘要】：隨著社會(huì)經(jīng)濟(jì)的飛速發(fā)展和城鎮(zhèn)工業(yè)化進(jìn)程的加快,電能需求也快速增長(zhǎng),特別是人口稠密、經(jīng)濟(jì)發(fā)達(dá)的中東部地區(qū),建設(shè)用地資源日益匱乏,如何實(shí)現(xiàn)電力需求與電力輸送的均衡發(fā)展成為亟需解決的問題。為有效解決電力輸送與輸電線路走廊緊缺、實(shí)現(xiàn)經(jīng)濟(jì)高效的電力能源輸送,同塔并架雙回、同塔多回、特高壓交流、交直流混合輸送等電力輸送方案得到了廣泛關(guān)注和采用。論文結(jié)合同塔多回輸電線路的特點(diǎn),以220/110kV同塔四回混壓輸電線路為研究對(duì)象,利用ATP-EMTP和ANSYS軟件對(duì)檢修線路上感應(yīng)電壓、電流以及檢修作業(yè)人員周圍電場(chǎng)強(qiáng)度進(jìn)行仿真分析。首先緒論部分介紹了課題研究背景及意義、國(guó)內(nèi)外關(guān)于同塔多回輸電線路以及帶電作業(yè)的發(fā)展和研究現(xiàn)狀,并對(duì)檢修作業(yè)中需要考慮的感應(yīng)電壓、電流以及作業(yè)人員體表場(chǎng)強(qiáng)的理論及其原理進(jìn)行詳細(xì)介紹;建立模型時(shí),充分考慮同塔多回輸電線路的實(shí)際情況,根據(jù)作業(yè)人員、線路及桿塔的實(shí)際參數(shù)建立仿真模型;研究停運(yùn)方式、線路運(yùn)行電流、導(dǎo)線相序排列、導(dǎo)線水平間距、導(dǎo)線回路間距等因素對(duì)檢修線路感應(yīng)電壓、電流大小的影響,臨時(shí)接地線間距對(duì)流過作業(yè)人員感應(yīng)電流大小的影響,以及不同運(yùn)行工況下桿塔典型作業(yè)位置的作業(yè)人員周圍場(chǎng)強(qiáng)分布及其變化規(guī)律。研究結(jié)果表明,線路運(yùn)行電流主要影響檢修線路的電磁感應(yīng)分量,對(duì)靜電感應(yīng)分量基本無影響;同相序時(shí)檢修線路感應(yīng)電壓、電流值最大,逆相序次之,異相序最小;隨著導(dǎo)線水平間距和回路間垂直間距的增大,線路間耦合程度減小,感應(yīng)電壓、電流均會(huì)降低;當(dāng)檢修位置兩側(cè)掛臨時(shí)接地線時(shí),作業(yè)人員仍要承受較大的感應(yīng)電流,為保證人員安全需在檢修點(diǎn)掛臨時(shí)接地線;對(duì)于同塔多回輸電線路,當(dāng)部分回路進(jìn)行檢修、其他回路正常運(yùn)行時(shí),部分作業(yè)位置的場(chǎng)強(qiáng)遠(yuǎn)高于人體皮膚感知水平,應(yīng)嚴(yán)格按照等電位方法進(jìn)行檢修,穿戴全套屏蔽服,進(jìn)入等電位時(shí)采用絕緣軟梯、硬梯、吊籃等工器具。根據(jù)上述結(jié)果,對(duì)選擇合適的接地開關(guān)、帶電作業(yè)時(shí)安全防護(hù)措施的制定以及作業(yè)方法有一定參考意義。
[Abstract]:With the rapid development of social economy and urban industrialization, energy demand is also growing rapidly, especially in densely populated and economically developed eastern regions, construction land increasingly scarce resources, how to realize the power demand and power transmission of the balanced development becomes an urgent problem to solve. In order to effectively solve the shortage of power transmission and transmission line corridors, and achieve economic and efficient power and energy transmission, power transmission schemes such as the same tower, double circuit, multi tower, ultra high voltage AC, AC and DC hybrid transmission have been widely concerned and adopted. Based on the characteristics of multi circuit transmission lines on the same tower, taking the 220/110kV four tower mixed transmission line on the same tower as the research object, ATP-EMTP and ANSYS software are used to simulate and analyze the induced voltage and current and the electric field intensity around maintenance workers. First, the introduction part introduces the research background and significance, at home and abroad on the multi circuit transmission lines on same tower and live working on the development and research status quo, and carries on the detailed introduction to the need to consider the maintenance of induction voltage, current and operating personnel surface field strength theory and its principle; to set up the model, fully consider the actual situation with the transmission line back to the tower, simulation model is established according to the actual parameters of line and tower operators, the effect of operation; line operation, current, wire, wire sequence level spacing, wire loop spacing and other factors on the maintenance of the line induced voltage and current, temporary grounding line spacing effect on the current through the operating personnel the electric field distribution and its variation around and under different operating conditions of tower typical work site workers. The results show that the electromagnetic induction component maintenance line line running current main influence, no influence on the electrostatic induction component; the same phase induction voltage and current maximum line maintenance, reverse phase sequence of minimum phase sequence; with the increase of the vertical spacing between the horizontal spacing and wire loop line, the coupling degree between induction decreases. The voltage and current will be reduced; when the maintenance position hanging off the sides of temporary grounding line, workers still under induction current is large, to ensure the safety of personnel in the maintenance point hanging temporary grounding line; for multi circuit transmission lines on same tower, when the circuit overhaul and other circuits during normal operation, part of the job position the field is much higher than that of the human skin perception level, should be strictly in accordance with the potential method for maintenance, wearing full shield clothing, into the insulating ladder, rigid ladder and basket work with potential Out. According to the above results, it is of certain reference significance for the selection of appropriate grounding switches, the formulation of safety protection measures in live work and the operation methods.
【學(xué)位授予單位】：長(zhǎng)沙理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TM75;TM743

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