本文關(guān)鍵詞：輸電線路脫冰動(dòng)態(tài)模型建立及其在誘發(fā)脫冰中的應(yīng)用　出處：《南京理工大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 脫冰振動(dòng) 輸電線路 兩節(jié)點(diǎn)等參桿單元 動(dòng)態(tài)響應(yīng) 誘發(fā)脫冰

【摘要】：輸電線路覆冰是最為常見的災(zāi)害之一。覆冰脫落時(shí),輸電線劇烈的上下振動(dòng)會(huì)引起短路、斷線、倒塔等事故。目前國內(nèi)外研究主要是利用有限元軟件建模、仿真輸電線路在簡單脫冰場景下(如按規(guī)定的位置脫冰、按規(guī)定的脫冰量脫冰和按規(guī)定的次序脫冰等)的動(dòng)態(tài)響應(yīng)。實(shí)際中最為常見的是導(dǎo)線某處覆冰先脫落,在導(dǎo)線振動(dòng)過程中導(dǎo)致其他位置覆冰相繼脫落的復(fù)雜場景。利用有限元軟件仿真復(fù)雜場景的輸電線脫冰動(dòng)態(tài)響應(yīng)具有建模操作復(fù)雜、易出錯(cuò)的缺點(diǎn)。為此本文基于兩節(jié)點(diǎn)等參桿單元建立孤立檔和連續(xù)檔輸電線脫冰動(dòng)態(tài)模型,可用于誘發(fā)脫冰等復(fù)雜工況下的脫冰動(dòng)態(tài)響應(yīng)研究。第一,基于兩節(jié)點(diǎn)等參桿單元建立孤立檔輸電線路模型,采用Newton-及aaphson方法求解靜態(tài)平衡方程,采用Newmark積分與Newton-Raphson結(jié)合的方法求解脫冰動(dòng)態(tài)平衡方程。與有限元軟件仿真結(jié)果和單檔輸電線路脫冰試驗(yàn)結(jié)果對(duì)比表明該模型與方法的有效性。第二,在單元模型的基礎(chǔ)上建立了連續(xù)檔輸電線路模型,采用Newmark積分與Newton-Raphson結(jié)合的方法求解連續(xù)檔輸電線路脫冰動(dòng)態(tài)響應(yīng)。連續(xù)檔數(shù)學(xué)模型包括絕緣子串?dāng)?shù)學(xué)模型、絕緣子串和導(dǎo)線鉸接的處理、連續(xù)檔輸電線初始位置的確定方法。與有限元軟件仿真結(jié)果和連續(xù)檔輸電線脫冰試驗(yàn)結(jié)果對(duì)比表明該模型和方法的有效性。第三,基于孤立檔和連續(xù)檔數(shù)學(xué)模型,考慮誘發(fā)脫冰效應(yīng),采用控制變量法分別仿真了孤立檔和連續(xù)檔在不同覆冰脫落臨界加速度、不同覆冰厚度、不同初始脫冰量和不同初始脫冰位置四種場景的誘發(fā)脫冰動(dòng)態(tài)響應(yīng),得到了一系列規(guī)律性的結(jié)論。
[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.

【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM752

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