大档距特高压覆冰输电线路起舞风速TTMD控制优化研究  

Optimization for galloping wind speed control of ultra-high-voltage iced conductors with large span using TTMD

作　　者：楼文娟[1] 温作鹏 梁洪超 LOU Wen-juan;WEN Zuo-peng;LIANG Hong-chao(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,浙江杭州310058

出　　处：《振动工程学报》2021年第5期934-942,共9页Journal of Vibration Engineering

基　　金：国家自然科学基金资助项目(51678525,51838012)。

摘　　要：针对大档距特高压输电线路舞动难以防治的问题,设计了一种电涡流扭转向调谐质量阻尼器(TTMD),并论证了相比于竖向阻尼器具有更强的适用性。从整档线路力学模型出发,推导了整档线路覆冰导线-TTMD系统的舞动偏微分方程,选取全局形函数离散得到常微分方程,采用李雅普诺夫稳定定理计算起舞风速。建立基于遗传算法的TTMD防舞优化设计方法,考虑到真实环境中导线覆冰偏角存在较大的不确定性,以大范围多覆冰偏角下导线最小起舞风速为优化目标,对TTMD的频率比、阻尼比、质量比、安装位置、导线张力、覆冰质量等参数进行优化设计。以某500 m大档距特高压输电线路覆冰八分裂导线为例进行优化设计,计算结果表明:当质量比高于0.005时,TTMD即可有效地提高最小起舞风速;TTMD的推荐安装位置范围为导线左侧1/4跨-右侧1/4跨;TTMD控制效果具有良好的鲁棒性;设计TTMD时,应当采用较高的导线张力、较低的覆冰质量设定,以得到偏于安全的TTMD参数设计值。To tackle the galloping issue of ultra-high-voltage transmission lines with large span,a torsional tuned mass damper(TTMD)with eddy current was designed,whose applicability on transmission lines of various spans compared with vertical tuned mass damper was proved.Based on the mechanical model of transmission line with full span,partial differential equations of galloping were derived for the full-span iced conductor-TTMD system.Then the equations were discretized using global shape functions to obtain ordinary differential equation.Subsequently,galloping wind speed was obtained using Lyapunov’s stability theorem.An optimization method of anti-galloping using TTMD based on genetic algorithm was established.Considering the uncertainty of declination of ice on conductors,the optimization objective was defined as the minimum galloping wind speed in multiple ice declination angles.Several parameters of TTMD were studied in the optimization process,including frequency ratio,damping ratio,mass ratio,installation position,conductor tension and ice mass.The optimization was performed on 8-bundled conductors of an ultra-high-voltage transmission line with a span of 500 m.The results show that,the TTMD can increase the minimum galloping wind speed with a mass ratio higher than 0.005;the recommended installation position of TTMD lies between the left 1/4 span and the right 1/4 span of the transmission line;the TTMD shows great robustness of control effectiveness;at the design stage of TTMD,the selection of a relatively high conductor tension and low ice mass can lead to safer TTMD design parameters.

关 键 词：风致振动 覆冰多分裂导线 防舞 特高压 扭转向调谐质量阻尼器(TTMD) 

分 类 号：TU312.1[建筑科学—结构工程] TM752.5[电气工程—电力系统及自动化]