输电线路的断线与脱冰特性及减振控制研究

发布时间：2018-03-04 10:15

本文选题：输电转角塔线体系　切入点：断线　出处：《武汉理工大学》2013年硕士论文　论文类型：学位论文

【摘要】：输电线路作为重要的生命线工程,保证其安全运行是非常必要的。由于输电线路长期暴露在野外环境中,时常受到强风、暴雪、冰冻、雷电等剧烈环境荷载的影响,致使输电线路容易引发断线、脱冰等灾害事故甚至导致电力运行中断。国内外学者在输电线路的断线、脱冰及其减振控制等方面开展了相关工作。但目前的相关研究工作基本都以直线型输电线路为主,对转角型输电线路的研究非常有限。特别是转角输电线路的相关参数对其服役性能的影响、转角输电线路的断线特性、脱冰特性等的研究还很匮乏。因此,本文开展了输电线路断线与脱冰特性的分析研究以及相关的减振控制研究。本文以某转角输电线路工程项目为背景,基于ABAQUS软件建立了塔线体系三维有限元模型,并分析了其动力特性。着重考察了转角塔两侧相邻输电线在不同夹角、不同档距下对输电塔主要杆件受力性能的影响。本文结合当前输电线路发生断线和脱冰下的最新研究进展,提出了冲击应力作为分析断线和脱冰对输电塔影响的指标。对转角塔线体系进行了断线和风致断线的数值模拟。针对损伤断线详细地分析了断线根数、断线位置对输电塔的冲击作用的规律,进一步考察了断线时转角塔两侧输电线之间夹角、档距的不同对输电塔的影响。此外还讨论了风致断线对输电塔主材杆件的承载力和塔顶位移的影响。本文对输电线路的覆冰种类及其物理参数进行了研究,结合我国电力规范和Jones覆冰模型给出了本文数值模拟的覆冰厚度。详细地分析了不同覆冰输电线阻尼比对塔线体系脱冰时的响应规律,系统地研究了输电线脱冰根数、脱冰位置、脱冰夹角、脱冰档距的不同对塔线体系发生脱冰时冲击作用的影响。本文提出了摩擦阻尼器对塔线体系的断线和脱冰进行减振控制的设计计算方法。分析了输电塔五种阻尼器布置方案的减振效果,从而为输电线路的防灾减灾提供了指导性的建议。
[Abstract]:As an important lifeline project, it is very necessary to ensure the safe operation of transmission line. Because the transmission line is exposed to field environment for a long time, it is often affected by severe environmental loads such as strong wind, heavy snow, freezing, lightning and so on. Transmission lines are liable to cause breakage, deicing and other disasters even lead to the interruption of power operation. Domestic and foreign scholars in the power transmission line breakage, Relevant work has been carried out on deicing and vibration control. However, most of the related research work at present is based on linear transmission lines. The research on the angle transmission line is very limited, especially the influence of the relevant parameters of the angle transmission line on its service performance, and the research on the broken line characteristic and deicing characteristic of the angle transmission line is very scarce. In this paper, the characteristics of breakage and deicing of transmission lines are analyzed and the vibration control is studied. In this paper, based on the ABAQUS software, the three-dimensional finite element model of the tower system is established, and its dynamic characteristics are analyzed. The angle between the adjacent transmission lines on the two sides of the turret is investigated. The effect of different spacing on the mechanical performance of the main members of the transmission tower. In this paper, according to the latest research progress of transmission line breakage and deicing, The impact stress is used as an index to analyze the influence of breakage and deicing on the transmission tower. The numerical simulation of the broken and wind-induced breakage of the turret system is carried out. The root number of the broken line is analyzed in detail for the damage broken line. Furthermore, the angle between the transmission lines on both sides of the turret is investigated when the transmission tower is broken. In addition, the influence of wind-induced breakage on the bearing capacity and tower top displacement of the main material member of the transmission tower is also discussed. In this paper, the types and physical parameters of icing on transmission lines are studied. Combined with the electric power code and Jones icing model in our country, the icing thickness of this paper is presented. The response law of different damping ratio of icing transmission line to tower line system is analyzed in detail, and the number of deicing roots of transmission line is studied systematically. The influence of deicing position, angle of deicing and deicing distance on the impact of deicing of tower line system. In this paper, the design and calculation method of frictional damper for vibration control of broken and deicing tower system is presented. The vibration reduction effect of five kinds of dampers for transmission towers is analyzed. Thus, the paper provides some instructive suggestions for the disaster prevention and mitigation of transmission lines.
【学位授予单位】：武汉理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TM752;TU31

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