一种抑制输电线路次档距振荡的新型阻尼间隔棒及其减振效果分析  

A New Type Damping Spacer to Reduce Sub-span Oscillation of Transmission Line and Its Vibration Reduction Analysis

作　　者：刘春城[1] 王冬 侯萌 孙红运 LIU Chuncheng;WANG Dong;HOU Meng;SUN Hongyun(School of Civil Engineering and Architecture,Northeast Electric Power University,Jilin 132012,Jilin Province,China)

机构地区：[1]东北电力大学建筑工程学院,吉林省吉林市132012

出　　处：《中国电机工程学报》2023年第6期2295-2305,共11页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51278091)。

摘　　要：次档距振荡是风的尾流效应引起多分裂导线在次档距范围内振动现象,成为危害输电线路安全稳定运行的一种主要灾害。为了减轻输电线路次档距振荡,提出并设计一种新型阻尼间隔棒。首先通过建立振动平衡方程分析新型阻尼间隔棒的吸振和减振机理,详细探究阻尼比、固有频率比和质量比的变化对其减振性能的影响规律,同时利用数值方法建立新型阻尼间隔棒–分裂导线体系的有限元模型,研究新型阻尼间隔棒对次档距振荡的减振效果,通过与普通间隔棒的减振效果对比发现,安装新型阻尼间隔棒的中间档距导线中点水平和竖向位移大幅减小,新型阻尼间隔棒对输电线路次档距振荡具有明显的减振作用。最后对新型阻尼间隔棒的结构参数和安装位置进行优化和设计,给出新型阻尼间隔棒的重球质量、弹簧刚度和阻尼系数的取值以及阻尼间隔棒的不等间距安装布置方案。Sub-span oscillation is a phenomenon of multi-bundled conductors vibration within the sub-span caused by the wake effect of wind,which has become a major disaster to the safe and stable operation of transmission lines.In order to reduce transmission line sub-span oscillation,a new type of damping spacer is presented and designed.First,the vibration absorption and vibration reduction mechanism of the new damping spacer is analyzed by establishing the vibration balance equation,and the influences of changes in the damping ratio,natural frequency ratio and mass ratio on its vibration damping performance are explored in detail.At the same time,a finite element model of the new damping spacer and split conductor system is established by using numerical methods,and the vibration reduction effect of the new damping spacer on the sub-span oscillation is studied.By comparing the vibration reduction effect with that of the ordinary spacer,it is found that the horizontal and vertical displacements of the middle point of the spacer rod are greatly reduced by installing the new type damping spacer;the new type damping spacer has a significant vibration reduction effect on the sub-span oscillation of the transmission line.Finally,the structural parameters and installation positions of the new damping spacer are optimized and designed,and the values of the weight,spring stiffness and damping coefficient of the new type damping spacer,as well as the unequal spacing installation plan of the damping spacer,are given.

关 键 词：新型阻尼间隔棒 输电线路次档距 振荡 分裂导线 减振效果 

分 类 号：TM75[电气工程—电力系统及自动化]