沿海输电导线风压数值模拟及风洞试验分析  

Numerical simulation of wind pressure and analysis of wind tunnel test of coastal transmission lines

作　　者：徐英 胡成杰 朱敏俊 XU Ying;HU Chengjie;ZHU Minjun(Zhoushan Qiming Electric Power Design Institute Co.,Ltd.,Zhoushan 316000,China;College of Civil Engineering,Zhejiang University of Technology,Hangzhou 310023,China;Design Institute Branch ofZhejiang Jiaotong Group Co.,Ltd.,Hangzhou 310051,China)

机构地区：[1]舟山启明电力设计院有限公司,浙江舟山316000 [2]浙江工业大学土木工程学院,浙江杭州310023 [3]浙江交工集团股份有限公司设计院分公司,浙江杭州310051

出　　处：《浙江工业大学学报》2022年第2期166-172,共7页Journal of Zhejiang University of Technology

基　　金：浙江省电力科技项目(KYY-HX-20180811)。

摘　　要：为研究沿海地区不同输电导线所受风压和风荷载随方位角的变化规律,首先,通过数值模拟探究了20 m/s风速下低风压导线的风压分布;然后,通过风洞试验得到6种方位角工况在10,20 m/s风速下低风压导线和钢芯铝绞线的阻力,并换算成垂直导线和顺导线方向的风压;最后,分析了考虑试验修正的多方位角工况下低风压导线的风荷载分配系数,为规范中风荷载分配系数的取值提供一定参考。试验结果表明:数值模拟的风压与风洞试验测得风压较接近,误差为3.7%;与普通钢芯铝绞线相比,低风压导线能有效降低风压,风压降低率在30%左右;风压和风荷载随方位角的变化规律一致,方位角小于30°时,低风压导线和普通的钢芯铝绞线所受荷载差别不大,方位角大于30°时,两种导线所受荷载差别较大。This paper aims to study the variations of wind pressure and wind load on different transmission lines with the azimuth angle in coastal areas.First,the wind pressure distribution on low wind pressure transmission lines under wind speed 20 m/s is studied by numerical simulation.A wind tunnel test is then conducted to obtain the resistances of low wind pressure transmission lines and aluminum-cable steel-reinforced(ACSR)transmission lines under wind speeds 10 m/s and 20 m/s for six azimuth angles and to convert into the wind pressures in the transverse and longitudinal directions.Finally,by considering test results,the wind load distribution coefficient of low wind pressure transmission lines under multiple azimuth angles is analyzed,which provides a reference for design codes.The results show that the wind pressure by numerical simulation is close to that from the wind tunnel test with a relative error of about 3.7%.Compared with the ordinary ACSR transmission lines,low wind pressure transmission lines can effectively reduce the wind pressure and the reduction efficiency is about 30%.The variations of wind pressure and wind load with the azimuth angle are consistent.When the azimuth angle is smaller than 30°,the load difference between low wind pressure transmission lines and ordinary ACSR ones is not significant.When the azimuth angle is larger than 30°,the load difference between them is significant.

关 键 词：低风压导线 数值模拟 风洞试验 风荷载 风压 

分 类 号：TM75[电气工程—电力系统及自动化]