抑制分裂导线次档距振荡的间隔棒优化布置技术研究

发布时间：2018-01-11 12:17

本文关键词：抑制分裂导线次档距振荡的间隔棒优化布置技术研究　出处：《华北电力大学》2014年硕士论文　论文类型：学位论文

【摘要】：输电线路作为电网中重要的组成部分,其安全运行关系到国民经济的发展。随着输电线路的电压等级逐步提高,分裂导线以其优越的抑制电晕和减小电抗等性能被特高压、超高压输电线路广泛使用。然而,分裂导线有其特有的风致振动现象——次档距振荡,对输电导线及其金具的安全运行有着极大的威胁。因此急需在抑制次档距振荡的技术上进行深入研究以保证输电线路安全运行。本文对分裂导线次档距振荡现象进行了研究,从次档距振荡的本质入手分析其诱因,针对云南电网公司曾经发生过次档距振荡现象的220kV丽海线,利用ADINA软件搭建双分裂CFD模型,进行CFD数值仿真,得到背风子导线处在迎风子导线尾流中不同位置的气动力变化特性,并对次档距振荡发生的风速范围进行仿真计算,获得不同风速下的背风子导线的气动力变化特性；基于对云网发生过分裂导线次档距振荡现象的调研和对分裂导线进行CFD数值仿真,分析了分裂导线次档距振荡的影响因素。针对目前普遍采用的通过布置间隔棒来实现抑制次档距振荡的防护措施,本文总结和参考以往的布置经验,提出了间隔棒优化布置方法,确定优化布置目标函数和约束条件,采用惩罚函数外点法对间隔棒的布置进行优化计算,基于matlab软件平台,编写最大次档距、端次档距、间隔棒数量和平均次档距的计算程序,以及优化布置的计算程序。最后,基于MATLAB软件的GUI (Graphical User Interfaces,图形用户界面)对优化程序的M文件进行处理、编译,封装成exe格式文件,开发了间隔棒优化布置软件,提供用户操作界面,通过输入相应参数便可快速得到各段次档距的最优值,为间隔棒的优化布置计算提供了方便。
[Abstract]:As an important part of power network, the safe operation of transmission line is related to the development of national economy. Split conductors are widely used in UHV transmission lines because of their superior performance such as restraining corona and reducing reactance. However, splitting conductors have their unique wind-induced vibration phenomenon-substance-distance oscillation. It is a great threat to the safe operation of the transmission wire and its hardware, so it is urgent to study the technology of restraining the sub-gap oscillation in order to ensure the safe operation of the transmission line. In this paper, the phenomenon of secondary distance oscillation of split conductor is studied, and its inducement is analyzed from the essence of secondary distance oscillation, aiming at 220 kV Lihai line which once occurred in Yunnan Power Grid Company. The double-split CFD model is built by using ADINA software, and the CFD numerical simulation is carried out, and the aerodynamic characteristics of the leeward conductor in different positions in the wake of the windward traverse are obtained. The wind speed range of the sub-space oscillation is simulated and the aerodynamic characteristics of the sub-conductors under different wind speeds are obtained. Based on the investigation of the phenomenon of over-splitting traverse sub-spacing oscillation in cloud network and the CFD numerical simulation of split traverse, the influencing factors of splitting traverse sub-span oscillation are analyzed. In view of the commonly used protection measures to suppress the secondary spacing oscillation by arranging the spacer rods, this paper summarizes and refers to the previous layout experience, and puts forward the optimal layout method of the spacer rods. The optimal layout objective function and constraint conditions are determined and the penalty function outer point method is used to optimize the layout of spacer rods. Based on the matlab software platform, the maximum secondary distance and the end interval are compiled. The calculation program for the number of spacers and the average subspace, as well as the program for optimizing the arrangement. Finally. Based on MATLAB software GUI graphical User interfaces (graphical user interface) to optimize the program M file processing, compilation. Encapsulated into the exe format file, developed the spacer rod optimization arrangement software, provided the user operation interface, through input the corresponding parameter can quickly obtain the each segment order space optimal value. It is convenient to calculate the optimal arrangement of spacer rods.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM75

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