1000kV特高压输电塔线体系风荷载传递机制风洞试验研究  

Wind Tunnel Test on Wind Load Transferring Mechanism in the 1 000 kV UHV Transmission Tower-line System

作　　者：谢强[1] 李继国[1] 严承涌 周勇[1] 

机构地区：[1]同济大学土木工程学院,上海市杨浦区200092 [2]中国海诚工程科技股份有限公司,上海市静安区200031

出　　处：《中国电机工程学报》2013年第1期109-116,共8页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51278369;50778135);教育部霍英东教育基金会资助课题(114021)~~

摘　　要：为研究输电塔线体系的风荷载传递机制,以皖电东送淮南—上海输变电工程1000kV特高压送电线路中的直线钢管塔为设计原型,在同济大学TJ-3风洞试验室进行了输电塔–八分裂导线五塔四线耦联体系完全气弹模型风洞试验,测得了体系的加速度和位移响应。采用光纤布拉格光栅(fiber Bragg grating,FBG)传感器,测得了塔身主材、导线及绝缘子在风荷载作用下的动应变。通过对不同风攻角、流场及风速工况下塔线体系动力响应数据的统计与分析,总结出了导线、绝缘子和输电塔风致振动规律;通过功率谱密度分析,揭示了输电塔线耦联体系的风荷载传递机制。研究结果表明,塔线体系风致振动呈现强非线性耦合作用,导线及绝缘子的振动对输电塔具有重要影响,随着风速的增加,导线高阶振型对能量的贡献增大。To clarify the wind load transferring mechanism of tower-line system, a wind tunnel test on a four-span tower-line system model was carried out in T J-3 wind tunnel at Toni University with the prototype in the Huainan-Shanghai 1 000 kV ultra high voltage （UHV） electric power transmission project. An aero-elastic model of the double circuit tower and eight-bundled conductors coupling system was designed. Besides the measurement of acceleration and displacement, Fiber Bragg grating sensors were used to measure the dynamic strain of the conductors, insulators and tower main members. It is found from the analysis that the dynamic characteristics of power transmission tower-line system under wind load are greatly influenced by the tower-conductor coupling effects. As wind speed goes up, the contribution of higher order vibration modes of the conductors to the total energy of the system increases as well.

关 键 词：特高压输电线路 1 000kV耦联效应 输电塔线体系 光纤布拉格光栅传感器 风洞试验 荷载传递机制 

分 类 号：TM75[电气工程—电力系统及自动化]