1000kV特高压交流输电8分裂导线动张力风洞试验分析  

Wind Tunnel Test Analysis on Dynamic Tension of 1000 kV UHV Eight Bundled Conductors

作　　者：谢强[1,2] 严承涌 李素贞[1] 

机构地区：[1]同济大学建筑工程系,上海200092 [2]同济大学土木工程防灾国家重点实验室,上海200092 [3]中国海诚工程科技股份有限公司,上海200031

出　　处：《高电压技术》2010年第7期1594-1600,共7页High Voltage Engineering

基　　金：国家自然科学基金(50508026 ;50778135);教育部霍英东教育基金会优选资助课题(114021);国家电网公司科技项目(2008-536)~~

摘　　要：导线在风荷载作用下的动张力变化对输电塔线耦联体系抗风设计非常重要。为此,以在建1000kV特高压输电线路工程为背景进行风洞试验。设计制作了双回路8分裂导线的完全气弹模型,首次采用光纤布拉格光栅对分裂导线在风作用下的动应变进行了测试。试验得到了不同风攻角、流场和风速情况下不同位置导线的动应变,得出了导线动张力的传递规律和导线动力响应的主要特性。分析了导线不同位置动应变响应的分布规律和功率谱变化,证实了风作用下塔线耦联体系中导线和塔之间能量传递规律。研究结果表明输电塔抗风设计中应该考虑动张力对塔线耦联体系作用的影响。It is very important to consider the variation of the wind induced dynamic tension in lines when designing the transmission tower-line coupling system subjected to wind. Taking a 1000 kV UHV transmission project under construction as the prototype,we designed a 1000kV double circuit tower-eight bundled conductors coupling system and tested its scaled aeroelastic model in wind tunnel. In the experiment,fiber Bragg grating sensors,for the first time,were used to measure the wind induced dynamic strain of the bundled conductors. The dynamic tension transmission rule and the characteristics of dynamic responses of the conductors were derived from the measured dynamic strains under several different test cases,which differ in wind attack angles,flow fields and wind speeds,etc. Analysis of the strain distribution and the power spectra density at different locations in the conductor verified the energy exchange law between the conductor and the tower in the transmission tower-line coupling system. The results show that the dynamic tension should be considered in wind resistant design of transmission tower-line coupling system.

关 键 词：特高压输电线 8分裂导线 动应变 光纤布拉格光栅传感器 风洞试验 风荷载 

分 类 号：TM753[电气工程—电力系统及自动化]