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浙江大学学报(工学版)
土木与交通工程     
微地形下输电线路跳线的风偏分析
徐海巍, 楼文娟, 李天昊, 梁洪超, 章李刚, 卢明
1. 浙江大学 建筑工程学院,浙江 杭州310058
2. 国网浙江省电力公司 经济技术研院,浙江 杭州310000
3. 国网河南省电力公司 电力科学研究院,河南 郑州 450052
Wind-induced swing investigation on transmission line jumper wire under hilly terrain
XU Hai wei, LOU Wen juan, LI Tian hao, LIANG Hong chao, ZHANG Li gang, LU Ming
1. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China;
2. State Grid Zhejiang Economic Research Institute, Hangzhou 310000, China;
3. Electric Power Research Institute of State Grid Hunan Electric Power Company, Zhengzhou400052 China
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摘要:

为了解微地形条件下跳线风偏的特性以保障输电线路的安全运行,对某条实际输电线路进行有限元分析,提出适用于跳线风偏计算的有效模型.采用微地形下风场的风洞试验结果结合数值方法模拟来流三维脉动风,以此对微地形下的跳线风偏进行时程分析并与我国荷载规范中平坦B类地貌下的结果进行比较.研究结果表明:跳线两端的导线运动对跳线风偏有影响显著.微地形下,水平风速在山顶有明显增加而湍流度则有所减少,且有不可忽略的竖向风速产生.相比山坡,山顶处的水平风速更大而竖向风速偏小.微地形下跳线风偏比平坦B类地貌有显著增加.

Abstract:

Finite element analysis was applied to a real transmission line and an effective model for estimating a jumper wire swing under wind actions was proposed, in order to investigate wind-induced swing characteristics of jumper wires under hilly terrain and to ensure safe operation of a transmission line. Wind tunnel tests of a typical hill were combined with numerical simulation method to derive three-dimensional fluctuating wind speeds of incoming flow. Using the obtained wind speeds and time history analysis method, wind-induced swing of the jumper wire under hilly terrain was calculated and then compared with results of the terrain category B as defined in the Chinese load code. Results show that conductor motions on both the ends of a jumper wire have significant effects on wind-induced swing of the jumper wire. Under a hilly terrain, horizontal wind speed increases significantly while the turbulence intensity decreases at the hill top where notable vertical wind speeds can also be observed. Compared to hillside, hill top has higher horizontal wind speeds but lower vertical wind speeds. Wind-induced swing of a jumper wire under hilly terrain increases more significantly relative to the terrain category B.

出版日期: 2017-03-06
CLC:  TM 726  
基金资助:

国家自然科学基金项目资助项目(51508502, 51678525, 51378468); 博士后国家基金资助项目(2015M581938)

作者简介: 徐海巍(1986—),男,博士后,从事建筑结构抗风等研究.ORCID:0000-0003-2091-5796. E-mail:haiwe163@163.com
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徐海巍, 楼文娟, 李天昊, 梁洪超, 章李刚, 卢明. 微地形下输电线路跳线的风偏分析[J]. 浙江大学学报(工学版), 10.3785/j.issn.1008-973X.2017.02.006.

XU Hai wei, LOU Wen juan, LI Tian hao, LIANG Hong chao, ZHANG Li gang, LU Ming. Wind-induced swing investigation on transmission line jumper wire under hilly terrain. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 10.3785/j.issn.1008-973X.2017.02.006.

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