【摘要】：鑒于目前大型水電站超高壓輸變電系統(tǒng)雷電過電壓防護(hù)設(shè)計(jì)方法單一、手段落后,因此不斷豐富設(shè)計(jì)手段,提高設(shè)計(jì)水平顯得尤為重要。通過對(duì)國(guó)內(nèi)外雷電過電壓領(lǐng)域研究現(xiàn)狀的分析比較,選擇將ATP-EMTP仿真計(jì)算程序引入到項(xiàng)目設(shè)計(jì)過程中,以某大型水電站為研究對(duì)象,根據(jù)電站的實(shí)際情況建立電站輸變電系統(tǒng)仿真計(jì)算模型,通過仿真計(jì)算,對(duì)其雷電過電壓與絕緣配合進(jìn)行了分析研究,重點(diǎn)研究了不同條件下電站內(nèi)主變壓器和電抗器雷電侵入過電壓峰值的變化規(guī)律,并根據(jù)研究成果對(duì)主變壓器和電抗器避雷器保護(hù)距離的確定進(jìn)行復(fù)核并提出優(yōu)化建議。通過引入ATP-EMTP仿真計(jì)算程序,對(duì)電站輸變電系統(tǒng)初步設(shè)計(jì)方案進(jìn)行建模和計(jì)算,通過對(duì)計(jì)算結(jié)果的分析比較,可以復(fù)核電站內(nèi)的主要電氣設(shè)備是否受到有效的保護(hù),對(duì)暴露出來的問題進(jìn)行分析并提出解決方案,還可以指導(dǎo)電站內(nèi)電氣設(shè)備布置方式的優(yōu)化。在水電站設(shè)計(jì)領(lǐng)域引入計(jì)算機(jī)仿真計(jì)算手段,使水電站電氣設(shè)計(jì)又向科學(xué)化、精細(xì)化方向邁出了堅(jiān)實(shí)的一步。
[Abstract]:In view of the fact that the design method of lightning overvoltage protection is single and backward, it is very important to enrich the design means and improve the design level. Based on the analysis and comparison of the research status in the field of lightning overvoltage at home and abroad, the ATP-EMTP simulation program is selected to be introduced into the project design process, and a large hydropower station is taken as the research object. According to the actual situation of the power station, the simulation calculation model of the transmission and transformation system of the power station is established. Through the simulation calculation, the coordination between the lightning overvoltage and the insulation is analyzed and studied. The variation law of the peak value of lightning intrusive overvoltage of main transformer and reactor in power station under different conditions is studied emphatically. According to the research results, the determination of protection distance of main transformer and arrester is checked and the optimization suggestions are put forward. Through the introduction of ATP-EMTP simulation calculation program, the preliminary design scheme of transmission and transformation system of power station is modeled and calculated. Through the analysis and comparison of the calculation results, it can be found that the main electrical equipment in the nuclear power station can be effectively protected. The problems exposed are analyzed and the solutions are put forward, which can also guide the optimization of the layout of electrical equipment in the power station. The introduction of computer simulation in the field of hydropower station design makes the electric design of hydropower station more scientific and more refined.
【學(xué)位授予單位】：華北電力大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TV734;TM862

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