發(fā)布時間：2018-03-15 08:53

  本文選題：特高壓變電站　切入點：高抗本體-套管體系　出處：《中國電力科學研究院》2017年碩士論文　論文類型：學位論文

【摘要】：特高壓輸電工程是解決我國能源分配不均、環(huán)境污染的重要措施,為我國經濟發(fā)展提供清潔電力能源,在電力能源輸配領域作用舉足輕重,其安全運行關系國計民生。高壓并聯(lián)電抗器(高抗)是變電站中的重要電氣設備,主要破壞方式為電抗器本體發(fā)生傾倒和移位,或是設備上的高壓套管斷裂、錯位。唐山大地震后,我國地震區(qū)的高抗設備與基礎的連接多已采取加固措施,設備本體的破壞情況有所減輕。但是設備本體上的瓷套管在強震作用下仍然會發(fā)生嚴重損壞。本文結合特高壓電氣設備的結構特點,建立了高抗本體-套管體系數(shù)值仿真模型,重點以最薄弱的套管為分析對象,采用理論分析、數(shù)值仿真分析和振動臺試驗等研究手段,完成了 4項重要研究內容:(1)特高壓變電站高抗本體-套管體系動力特性及地震反應研究。建立高抗本體-套管體系數(shù)值仿真模型,研究設備瓷套管的動力特性包括振型、頻率分布、參振質量分布等規(guī)律,以及設備本體參數(shù)對設備瓷套管的地震影響規(guī)律。(2)特高壓變電站高抗本體-套管體系相似模型設計研究。基于動力模型相似理論提出了易于實現(xiàn)振動臺試驗且忽略重力影響的合理的特高壓高抗本體-套管體系的相似模型設計方法。(3)特高壓變電站高抗本體-套管體系隔震技術研究。建立忽略重力影響的特高壓高抗本體-套管體系相似數(shù)值仿真模型,并進行隔震設計分析,利用理論分析確定隔震器參數(shù),通過數(shù)值仿真計算高抗本體-套管體系安裝隔震器后套管的地震響應,計算結果顯示,安裝隔震器后套管地震響應減小50%以上,隔震效果顯著。(4)特高壓變電站高抗本體-套管體系振動臺試驗研究。對特高壓高抗本體-套管體系相似模型進行振動臺試驗,研究套管在地震作用下的地震反應規(guī)律及驗證隔震設計方案的有效性。試驗結果和仿真結果顯示,對于抗震結構,兩者吻合度較高,數(shù)值仿真模型基本能夠反映電抗器套管在地震波作用下的地震響應,隔震技術減小了電抗器套管的最大應變響應,在地震等級較高時減小幅度達50%以上,隔震效率顯著。
[Abstract]:UHV transmission project is an important measure to solve the problem of uneven energy distribution and environmental pollution in China. It provides clean power energy for the economic development of our country and plays an important role in the field of power energy transmission and distribution. High voltage shunt reactor (high reactance) is an important electrical equipment in substation. The main failure mode is that the reactor body is dumped and shifted, or the high voltage casing breaks on the equipment. Dislocation. After the Tangshan earthquake, most of the connections between the high resistance equipment and the foundation in the earthquake area of China have been strengthened. The damage of the equipment body has been alleviated, but the porcelain casing on the equipment body will still be seriously damaged under the strong earthquake. In this paper, the numerical simulation model of the high resistance Noumenon casing system is established according to the structural characteristics of the UHV electrical equipment. Focusing on the weakest casing as the object of analysis, using theoretical analysis, numerical simulation analysis and shaking table test and other research means, The dynamic characteristics and seismic response of high resistance bulk casing system in UHV substation have been studied. A numerical simulation model of high resistance bulk casing system has been established to study the dynamic characteristics of porcelain casing, including the mode of vibration. Frequency distribution, mass distribution, etc. And the influence of equipment body parameters on the earthquake of equipment porcelain casing. (2) the design of similarity model of high resistance bulk casing system in UHV substation. Based on the similarity theory of dynamic model, it is proposed that the shaking table test is easy to be realized and the vibration table test is easy to be realized. Study on isolation Technology of High Voltage bulk-casing system in UHV Substation with reasonable similarity Model Design method of UHV High Resistance bulk-casing system with slight Gravity effect. Similar numerical simulation model of casing system, The isolation design is analyzed and the parameters of the isolator are determined by theoretical analysis. The seismic response of the casing after the installation of the isolator is calculated by numerical simulation. The calculated results show that, After installing the isolator, the seismic response of the casing is reduced by more than 50%, and the isolation effect is remarkable. The shaking table test of the high resistance body-casing system in UHV substation is carried out. The shaking table test is carried out on the similar model of the UHV and HV Noumenon casing system. This paper studies the seismic response of casing under earthquake and verifies the effectiveness of seismic isolation design. The experimental results and simulation results show that for seismic structures, the two agree well. The numerical simulation model can basically reflect the seismic response of the reactor casing under the action of seismic wave. The isolation technique reduces the maximum strain response of the reactor casing, and the amplitude decreases by more than 50% when the earthquake grade is high, and the isolation efficiency is remarkable.
【學位授予單位】：中國電力科學研究院
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TU352.12

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本文編號：1615311