基于塔-线-串-棒多相耦合的舞动数值仿真分析  

Numerical Simulation on Galloping of Transmission Lines Based on Coupling of Tower-Bundle Conductor-Insulator-Spacer

作　　者：高彬 徐望圣 孙志林 白强 GAO Bin;XU Wang-sheng;SUN Zhi-lin;BAI Qiang(Central Southern China Electric Power Design Institute Co.,Ltd.of CPECC,Wuhan 430071,China;Guiyang Bureau of China Southern Power Grid Co.,Ltd.,Guiyang 550081,China)

机构地区：[1]中国电力工程顾问中南电力设计院有限公司,湖北武汉430070 [2]中国南方电网有限责任公司超高压输电公司贵阳局,贵州贵阳550081

出　　处：《电力勘测设计》2020年第11期12-18,共7页Electric Power Survey & Design

基　　金：中国南方电网公司科技项目:500kV紧凑型线路防舞动措施研究及应用项目,项目编号:010200KK52160015,科技编号:CGYKJXM20160016.

摘　　要：为研究输电线路舞动对导线端部张力的影响,建立塔-线-串-棒多相耦合的直流输电线路模型,分析耐-耐和耐-直-直-直-耐两种模式,得出结论:探究得到不同模式下耐张塔和直线塔端部张力值分布规律;并发现随着档距增加,舞动时导线端部张力逐渐增大,舞动幅值逐渐增大,舞动频率逐渐降低。对比昌吉—古泉工程实际观测结果与数值模拟结果,验证了成果的正确性。针对防舞设计提出如下建议:使用导线最大使用张力对输电塔横担挂点处构件进行强度效验;对非孤立档耐张塔,导线张力差宜设置为90%最大使用张力。To study the influence of transmission line galloping on conductor end tension,DC transmission line model is established,which couples tower,insulator string and conductor.Two modes are analyzed,which are tension tower-tension tower(T-T Mode)and tension tower-suspension tower-suspension tower-suspension tower-tension tower(T-S-S-S-T Mode).It’s concluded that:Distribution of tension at the end of tension tower and straight tower under different modes is obtained;With the increasing of tower span,conductor tension during galloping is increasing and amplitude of conductor increases and the frequency of conductor gradually decreases.Comparing numerical simulation results with actual observation data of Changji—Guquan project,correctness of results is proved.Advise for tower design of galloping is given:Conductor allowable tension should be used for conductor hang point strength check;90%conductor allowable tension should be used as unbalanced load for tower strength check.

关 键 词：数值仿真 舞动 分裂导线 导线张力 间隔棒 输电塔 绝缘子串 

分 类 号：TM75[电气工程—电力系统及自动化]