考虑耐张绝缘子串的八分裂输电线路舞动特性研究  

Study on the galloping characteristics of eight-bundle conductor with strain insulator strings

作　　者：刘竹丽[1] 霍翔宇 伍川 王金洋 张博 刘光辉 LIU Zhuli;HUO Xiangyu;WU Chuan;WANG Jinyang;ZHANG Bo;LIU Guanghui(School of Mechanical and Power Engineering,Zhengzhou University,Zhengzhou 450001,China;Henan Key Laboratory of Power Transmission Line Galloping Prevention and Control Technology,State Grid Henan Electric Power Research Institute,Zhengzhou 450052,China)

机构地区：[1]郑州大学机械与动力工程学院,郑州450001 [2]河南省电力线路舞动防治技术重点实验室,国网河南省电力公司电力科学研究院,郑州450052

出　　处：《应用力学学报》2023年第5期1085-1095,共11页Chinese Journal of Applied Mechanics

基　　金：国家电网公司总部科技资助项目(No.52170218000F);中国博士后科学基金资助项目(No.2020M672238)。

摘　　要：导线舞动是长期以来影响输电线路度冬安全的重要因素。以包含耐张绝缘子串的新月形覆冰八分裂输电线路为对象,FLUENT及ABAQUS为平台,开展了导线的气动特性及驰振稳定性分析,研究了分裂导线的扭转刚度及动力特性,考察了不同绝缘子串连接形式、风速及初始风攻角对幅值、位移时程及运动轨迹等舞动特性的影响。计算结果表明,多联耐张绝缘子串较单联会增大八分裂输电线路扭转刚度,明显改变低阶固有频率,竖直与扭转振动不易发生耦合;多联耐张绝缘子串较单联对输电线路舞动特性影响大,明显改变舞动形态,增大了竖直方向舞动幅值;随风速增大输电线路舞动幅值增大;随初始风攻角不同线路舞动特征有明显变化,且与驰振稳定性计算区间相符。研究结果为输电线路舞动特性分析及防舞控制方法的研究提供了指导。Conductor galloping has long been an important factor affecting the winter safety of transmission lines.Based on Fluent and ABAQUS,the aerodynamic coefficients of eight-bundle conductor with crescent-shaped iced are obtained to analyze the galloping stability.The conductor lines with different strain insulator strings are taken as the object to study the torsional stiffness and dynamic characteristics,and analyze the galloping characteristics like amplitude,time history of displacement and motion traces of conductors under different strain insulator string connection forms,wind speeds and initial attack angles.The results show that compared with single string,multiple strain insulator strings increase the torsional stiffness of eight split conductor lines,and change the low-order natural frequency obviously,which makes the vertical and torsional vibration coupled not easily;multiple strain insulator strings obviously change the galloping shape and increase the vertical galloping amplitude,which are great impacts on the galloping characteristics of conductor lines;the higher wind speed is,the higher galloping amplitude is;at the different initial wind attack angle,the galloping characteristics of conductor lines change obviously,which is consistent with the calculation range of galloping stability.The results provide guidance for the analysis of galloping characteristics of conductor lines and the research of anti-galloping technology.

关 键 词：耐张绝缘子串 八分裂输电线路 扭转刚度 舞动 

分 类 号：TM751[电气工程—电力系统及自动化]