本文選題：輸電線路 + 矩方法��； 參考：《西安科技大學》2017年碩士論文

【摘要】：電力系統(tǒng)是我國重要的生命線工程之一,是我國解決日益突出的能源問題的根本。輸電線路作為電力系統(tǒng)中不可或缺的部分,是保障其持續(xù)穩(wěn)定運行的關鍵。且輸電線路工程投資巨大,影響深遠,一旦其發(fā)生故障將給居民的安居樂業(yè)以及國民經(jīng)濟的穩(wěn)定發(fā)展帶來了嚴重的影響和巨大的危害,故輸電線路的安全可靠性成為保證我國持續(xù)穩(wěn)定發(fā)展的重要一環(huán)。合理可靠的線路工程設計是輸電線路安全穩(wěn)定運行的保障,而結(jié)構(gòu)設計是輸電線路工程設計的基礎,同時結(jié)構(gòu)設計的關鍵又在于結(jié)構(gòu)的可靠度分析,故針對輸電線路結(jié)構(gòu)體系開展可靠度分析意義非常。本文對風荷載作用下輸電線路中典型桿塔結(jié)構(gòu)體系、塔線結(jié)構(gòu)體系以及輸電線路結(jié)構(gòu)體系的可靠度進行了研究。首先,根據(jù)基本線路信息,包括地理氣象信息及線路構(gòu)件信息,利用ANSYS有限元軟件對典型桿塔結(jié)構(gòu)及塔線結(jié)構(gòu)體系進行建模分析,為后文的結(jié)構(gòu)可靠度研究提供基礎。其次,引入等價描述法,采用基于Rosenblatt變換的簡化的基于立方正太分布的矩方法計算分析了風荷載作用下線路中典型桿塔結(jié)構(gòu)體系的可靠度。然后,引入等價極值事件原理,并使用可靠度計算的矩方法計算分析了風荷載作用下線路中典型桿塔所對應的塔線結(jié)構(gòu)體系的可靠度。最后,引入層次分析法及變權(quán)綜合理論,建立了輸電線路結(jié)構(gòu)體系的三層次子體系遞推可靠性分析模型和計算方法,并基于前文分析得出的典型桿塔塔線體系可靠度,結(jié)合分析塔位段單元所處通道環(huán)境對輸電線路結(jié)構(gòu)體系的影響程度推得整條輸電線路結(jié)構(gòu)體系的可靠性。經(jīng)過方法應用前后的對比分析,結(jié)果表明本文所提出的可靠度分析模型和計算方法更加符合工程實際,可滿足工程實際需求。
[Abstract]:Power system is one of the important lifeline projects in our country, and it is the root of solving the increasingly prominent energy problem in our country. As an indispensable part of power system, transmission line is the key to ensure its continuous and stable operation. And the transmission line project investment is huge, the influence is far-reaching, once it breaks down, it will bring serious influence and great harm to the residents living and working in peace and contentment as well as the stable development of the national economy. Therefore, the safety and reliability of transmission lines become an important link to ensure the sustainable and stable development of our country. Reasonable and reliable line engineering design is the guarantee of the safe and stable operation of transmission line, while the structural design is the basis of transmission line engineering design. At the same time, the key of structural design lies in the reliability analysis of the structure. Therefore, it is very important to analyze the reliability of transmission line structure system. In this paper, the reliability of typical tower structure system, tower line structure system and transmission line structure system under wind load is studied. Firstly, according to the basic line information, including geographic meteorological information and line component information, the typical tower structure and the tower line structure system are modeled and analyzed by using ANSYS finite element software, which provides the basis for the research of structural reliability in the future. Secondly, the equivalent description method is introduced to calculate and analyze the reliability of typical tower structure system under wind load by using the simplified moment method based on Rosenblatt transform. Then, the equivalent extreme event principle is introduced, and the reliability of the tower system corresponding to the typical tower tower under wind load is calculated and analyzed by using the moment method of reliability calculation. Finally, by introducing analytic hierarchy process (AHP) and variable weight synthesis theory, the recursive reliability analysis model and calculation method of three-level sub-system of transmission line structure system are established, and the reliability of typical tower tower system is obtained based on the previous analysis. Based on the analysis of the influence of the channel environment on the transmission line structure system, the reliability of the whole transmission line structure system is derived. The results show that the reliability analysis model and calculation method proposed in this paper are more in line with the engineering practice and can meet the actual engineering needs.
【學位授予單位】：西安科技大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TM75

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