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  本文關(guān)鍵詞：750kV空載線路電弧重燃下分閘過電壓仿真分析　出處：《安徽理工大學》2017年碩士論文　論文類型：學位論文

  更多相關(guān)文章： 空載線路 分閘過電壓 電弧重燃 并聯(lián)電抗器 ATPdraw

【摘要】：在人類社會快速向前發(fā)展的同時,電網(wǎng)的建設(shè)經(jīng)過長時間的發(fā)展,已經(jīng)取得了舉世矚目的成就。到了二十一世紀,中國的電網(wǎng)技術(shù)已經(jīng)位于世界前列了。當前我國已經(jīng)將大力發(fā)展更加智能的現(xiàn)代化電網(wǎng)作為主要的事業(yè)。隨著高電壓等級電網(wǎng)的建設(shè),電力系統(tǒng)暫態(tài)過電壓的類型也變得更多,對其過電壓的研究就顯得更加重要。在電力網(wǎng)中,操作過電壓中的空載線路分閘過電壓對電氣設(shè)備的絕緣和保護都有很大的影響,多次造成絕緣子的閃絡(luò)和擊穿,其主要是由于其幅值高、波形陡和持續(xù)時間短的特點造成的。而造成分閘操作過電壓的最根本的原因是斷路器的重燃。所以,對其空載線路分閘過電壓在電弧重燃的情況下進行相關(guān)的研究和分析是很有實際意義的。本文就是基于750kV的空載線路,利用圖形預(yù)處理程序ATPdraw,通過組建四種不同的仿真模型,為750kV空載線路分閘過電壓仿真模型和在同一種情況下的750kV空載線路并聯(lián)電抗器分閘過電壓仿真模型;然后是在電弧重燃下建立的仿真模型,分別為750kV空載線路電弧重燃下分閘過電壓仿真模型和在同一種情況下的750kV空載線路電弧重燃下并聯(lián)電抗器分閘過電壓的仿真模型。具體研究方法是先對在電弧不重燃時的仿真模型進行仿真研究,得到在電弧不發(fā)生重燃時分閘過電壓的情況,然后設(shè)定不同的電抗器數(shù)值,研究并聯(lián)不同數(shù)值的電抗器對此種情況下分閘過電壓的抑制效果;然后對電弧重燃時的仿真模型進行仿真研究,在其他條件不變的情況下,設(shè)置不同的電弧重燃次數(shù),仿真研究不同弧重燃次數(shù)下的空載分閘過電壓,得到在所取范圍內(nèi)影響最惡劣時的電弧重燃次數(shù);然后設(shè)定電弧重燃次數(shù)為最惡劣的情形,在此種情況下再并聯(lián)不同的電抗器數(shù)值,仿真研究不同電抗器數(shù)值對此種情況下空載分閘過電壓的影響。最后對所得到的數(shù)據(jù)進行比較,分析討論電弧重燃對空載線路分閘過電壓的具體影響以及并聯(lián)電抗器對電弧重燃的具體抑制效果。
[Abstract]:With the rapid development of human society, the construction of the power grid has made remarkable achievements after a long period of development. In 21th century. China's power grid technology has been in the forefront of the world. At present, China has vigorously developed a more intelligent modern power grid as the main cause. With the construction of high-voltage power grid. There are more types of transient overvoltages in power systems, so it is more important to study them. The switching overvoltage of no-load line in operating overvoltage has a great influence on the insulation and protection of electrical equipment, which causes the flashover and breakdown of insulator many times, mainly because of its high amplitude. The characteristics of steep waveform and short duration. And the most fundamental cause of switching overvoltage is the reburning of circuit breakers. It is of great practical significance to study and analyze the switching overvoltage of its no-load line in the case of arc reburning. This paper is based on 750kV no-load line. Four different simulation models are constructed by using drawing preprocessing program, which is a drawing preprocessing program. The simulation model of switching overvoltage for 750 kV no-load transmission line and the simulation model for switching overvoltage of parallel reactor of 750 kV no-load line under the same condition; Then the simulation model is established under arc reburning. The simulation models of switching overvoltage for 750kV no-load lines under arc reburning and for parallel reactors under reburning of 750kV no-load lines under the same condition are presented respectively. The method is to simulate the simulation model when the arc is not reburning. When the arc does not reburn, the switching overvoltage is obtained, and then different reactor values are set to study the suppression effect of the shunt reactor on the switching overvoltage in this case. Then the simulation model of arc reburning is simulated. Under other conditions, different arc reburning times are set, and the no-load switching overvoltage under different arc reburning times is simulated. The number of arc reburning in the worst range is obtained. The number of arc reburning is then set to be the worst case in which different reactor values are paralleled. The effects of different reactor values on the no-load switching overvoltage in this case are studied by simulation. Finally, the obtained data are compared. The influence of arc reburning on the switching overvoltage of no-load lines and the effect of parallel reactor on arc reburning are analyzed and discussed.
【學位授予單位】：安徽理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TM75

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本文編號：1398930