风荷载作用下输电线路结构体系可靠度分析

发布时间：2018-05-05 21:45

本文选题：输电线路 + 矩方法　；参考：《西安科技大学》2017年硕士论文

【摘要】：电力系统是我国重要的生命线工程之一,是我国解决日益突出的能源问题的根本。输电线路作为电力系统中不可或缺的部分,是保障其持续稳定运行的关键。且输电线路工程投资巨大,影响深远,一旦其发生故障将给居民的安居乐业以及国民经济的稳定发展带来了严重的影响和巨大的危害,故输电线路的安全可靠性成为保证我国持续稳定发展的重要一环。合理可靠的线路工程设计是输电线路安全稳定运行的保障,而结构设计是输电线路工程设计的基础,同时结构设计的关键又在于结构的可靠度分析,故针对输电线路结构体系开展可靠度分析意义非常。本文对风荷载作用下输电线路中典型杆塔结构体系、塔线结构体系以及输电线路结构体系的可靠度进行了研究。首先,根据基本线路信息,包括地理气象信息及线路构件信息,利用ANSYS有限元软件对典型杆塔结构及塔线结构体系进行建模分析,为后文的结构可靠度研究提供基础。其次,引入等价描述法,采用基于Rosenblatt变换的简化的基于立方正太分布的矩方法计算分析了风荷载作用下线路中典型杆塔结构体系的可靠度。然后,引入等价极值事件原理,并使用可靠度计算的矩方法计算分析了风荷载作用下线路中典型杆塔所对应的塔线结构体系的可靠度。最后,引入层次分析法及变权综合理论,建立了输电线路结构体系的三层次子体系递推可靠性分析模型和计算方法,并基于前文分析得出的典型杆塔塔线体系可靠度,结合分析塔位段单元所处通道环境对输电线路结构体系的影响程度推得整条输电线路结构体系的可靠性。经过方法应用前后的对比分析,结果表明本文所提出的可靠度分析模型和计算方法更加符合工程实际,可满足工程实际需求。
[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.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM75

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