Impact Analysis of Wind Direction upon Wind Load on Tower Line in Mountainous Microtopography

2nd International Symposium on Resource Exploration and Environmental Science

生态环境科学

Zhang, Hongjie^1 ; Yang, Fengli^1 ; Zhou, Qiang^2 ; Weng, Lanxi^3 ; Su, Zhigang^1

China Electric Power Research Institute, Beijing

100055, China^1

Southwest Jiaotong University, Chengdu

610031, China^2

Power China Fujian Electric Power Survey and Design Institute Co. Ltd., Fuzhou

350003, China^3

关键词: Acceleration effects;    Acceleration ratio;    Accident analysis;    CFD simulations;    Micro topography;    Wind directions;    Wind speed;    Wind-resistant design;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/170/4/042047/pdf
DOI  :  10.1088/1755-1315/170/4/042047

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

When transmission lines pass through microtopographic area, the acceleration effect of wind speed should be taken into consideration during designing. However, the acceleration ratio coefficient of wind speed should not be selected simply according to mountain slope as specified by standards. In order to comprehensively consider the impact of wind direction and microtopography upon acceleration ratio of wind speed. This paper selects the acceleration ratios of wind speed at the height of 10m-120m in a tower position at 24 angles of direction wind by virtue of CFD simulation analysis. Combined with the line trend, this paper compares and calculates the change rule of wind loads on tower body and lead/ground wires after considering the pre/post-impact of acceleration ratio of wind speed. Through analysis, this paper forms suggestions on wind-resistant design for lead/ground wires in transmission lines in microtopographic area as well as accident analysis for reference.