输电线路脱冰动态模型建立及其在诱发脱冰中的应用

发布时间：2018-01-10 19:03

本文关键词：输电线路脱冰动态模型建立及其在诱发脱冰中的应用　出处：《南京理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：输电线路覆冰是最为常见的灾害之一。覆冰脱落时,输电线剧烈的上下振动会引起短路、断线、倒塔等事故。目前国内外研究主要是利用有限元软件建模、仿真输电线路在简单脱冰场景下(如按规定的位置脱冰、按规定的脱冰量脱冰和按规定的次序脱冰等)的动态响应。实际中最为常见的是导线某处覆冰先脱落,在导线振动过程中导致其他位置覆冰相继脱落的复杂场景。利用有限元软件仿真复杂场景的输电线脱冰动态响应具有建模操作复杂、易出错的缺点。为此本文基于两节点等参杆单元建立孤立档和连续档输电线脱冰动态模型,可用于诱发脱冰等复杂工况下的脱冰动态响应研究。第一,基于两节点等参杆单元建立孤立档输电线路模型,采用Newton-及aaphson方法求解静态平衡方程,采用Newmark积分与Newton-Raphson结合的方法求解脱冰动态平衡方程。与有限元软件仿真结果和单档输电线路脱冰试验结果对比表明该模型与方法的有效性。第二,在单元模型的基础上建立了连续档输电线路模型,采用Newmark积分与Newton-Raphson结合的方法求解连续档输电线路脱冰动态响应。连续档数学模型包括绝缘子串数学模型、绝缘子串和导线铰接的处理、连续档输电线初始位置的确定方法。与有限元软件仿真结果和连续档输电线脱冰试验结果对比表明该模型和方法的有效性。第三,基于孤立档和连续档数学模型,考虑诱发脱冰效应,采用控制变量法分别仿真了孤立档和连续档在不同覆冰脱落临界加速度、不同覆冰厚度、不同初始脱冰量和不同初始脱冰位置四种场景的诱发脱冰动态响应,得到了一系列规律性的结论。
[Abstract]:Transmission line icing is one of the most common disasters. Ice shedding, severe upper and lower vibration will cause a short circuit, wire disconnection, tower collapse and other accidents. The domestic and foreign research mainly is the use of finite element software modeling and Simulation of the transmission line in simple Ice Shedding scenarios (such as at the specified position off the ice, according to the provisions of the amount of ice and ice shedding off according to the provisions of the order of ice shedding) dynamic response. The most common is the icing somewhere first off, resulting in complex scenes elsewhere in successive Ice Shedding wire vibration process. By using the finite element software simulation of transmission lines in complex scenes Ice Shedding dynamic response modeling has the complex operation and error prone defects. In this paper two node isoparametric element is established based on the isolated span and continuous Ice Shedding span dynamic model of transmission line, can be used for removing ice induced dynamic response research of ice shedding and other complex condition. Article A two node isoparametric element of isolated span transmission line model based on the Newton- and aaphson methods for solving the static equilibrium equation method for solving Newmark integral of the Newton-Raphson combined with the off ice dynamic equilibrium equation. Comparing ice test results and the results of finite element simulation software and single gear transmission lines and show the effectiveness of the model and method. Second, based on the element model of continuous gear transmission line model is established and solved by Newmark integral method combined with Newton-Raphson continuous gear transmission line deicing dynamic response. The mathematical model of continuous files including mathematical model of Insulator String Insulators and conductors with hinged, continuous wire shelf method to determine the initial position. With the results of finite element simulation software and continuous file transmission line contrast ice shedding test results show that the validity of the model and method. Third, based on the lonely Filing and continuous gear mathematical model, considering the effect induced by ice shedding, using control variables were simulated and isolated span continuous spans in different ice shedding critical acceleration, different ice thickness, different initial ice volume and Ice Shedding in different initial position of four kinds of scene and the dynamic response induced by ice, a a series of conclusions.

【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM752

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