1000 kV八分裂输电线路负刚度阻尼器防舞的风洞试验研究  

Wind tunnel test on anti⁃galloping of a 1000 kV eight⁃bundled transmission line by negative stiffness dampers

作　　者：楼文娟[1] 吴蕙蕙 黄赐荣 王强 LOU Wenjuan;WU Huihui;HUANG Cirong;WANG Qiang(Institute of Structural Engineering,Zhejiang University,Hangzhou 310058,China)

机构地区：[1]浙江大学结构工程研究所,杭州310058

出　　处：《振动与冲击》2025年第4期21-27,81,共8页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(51838012)。

摘　　要：利用磁体相互作用力设计了一种负刚度装置,并与电涡流阻尼器并联制得负刚度阻尼器(negative stiffness damper,NSD)。在导线大比例缩尺模型近端部安装阻尼器进行自振试验,发现阻尼器可以提升系统一阶等效阻尼比,其中NSD的减振性能更佳。以某1000 kV八分裂输电线路为工程原型,基于模态分解法与动力相似关系,设计了导线-阻尼器系统的舞动风洞试验装置,在典型易舞风攻角下,进行了安装不同阻尼器的节段模型风洞试验。结果表明:端部阻尼器对导线的竖向舞动具有较好的抑制效果,能够有效提高导线起舞风速、降低导线竖向舞动幅值,且NSD的抑舞性能优于黏滞阻尼器;但在以扭转向舞动为主的工况下,安装在分裂导线近中心的单阻尼器防舞效果不佳,针对这种情况给出了双阻尼器并联连接导线的方案,试验验证了这种方案可以有效抑制扭转向舞动。Based on magnetic interaction forces,a negative stiffness device was designed and coupled with an eddy current damper to create a negative stiffness damper(NSD).Self⁃vibration tests were conducted on a large⁃scale model of the conductor with dampers installed near its ends,revealing that dampers can enhance the equivalent damping ratio of the conductor,with NSD exhibiting superior vibration reduction performance.Utilizing a 1000 kV eight⁃bundled transmission line as an engineering prototype,the test model for the conductor⁃damper system was designed based on mode decomposition and dynamic similarity principle.Wind tunnel tests were conducted on the segment model with different dampers under typical attack angles.The results indicate that dampers have a significant inhibitory effect on the vertical galloping of the transmission line,increasing the critical wind speed and reducing the vertical amplitude.NSD outperforms traditional viscous dampers in galloping suppression.However,under conditions where torsional galloping dominates,the single damper installed on the split conductor has poor anti⁃galloping effect.A solution involving dual dampers connected in parallel with the conductor was proposed,and experimental validation demonstrated its effectiveness in suppressing torsional galloping.

关 键 词：输电线路 负刚度阻尼器(NSD) 风洞试验 防舞 

分 类 号：TM752[电气工程—电力系统及自动化]