考虑微地形修正的输电线路场地台风极值风速估计

卞荣; 张琳琳; 朱子笛; 黄铭枫; 陈科技; 鲍旭明

doi:10.3724/j.gyjzG23111207

考虑微地形修正的输电线路场地台风极值风速估计

doi: 10.3724/j.gyjzG23111207

1. 国网浙江省电力有限公司经济技术研究院, 杭州 310016;
2. 浙江大学建筑工程学院结构工程研究所, 杭州 310058

基金项目:

国家自然科学基金项目（52178512）；国网浙江省电力有限公司经济技术研究院自建专项（JY02202248）。

详细信息

作者简介:
卞荣，硕士，高级工程师，主要从事输电线路设计，bianrong1@163.com。

通讯作者:
黄铭枫,博士,教授,主要从事结构风工程研究,mfhuang@zju.edu.cn。

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出版历程
- 收稿日期: 2023-11-12
- 网络出版日期: 2026-01-06

Typhoon Extreme Wind Speed Estimation of Transmission Line Sites Considering Microtopography Correction

1. Economic Research Institute of State Grid Zhejiang Electric Power Co.，Ltd.，Hangzhou 310016，China;
2. Institute of Structural Engineering，College of Civil Engineering and Architecture，Zhejiang University，Hangzhou 310058，China

摘要

摘要: 我国东南沿海地区每年直面西北太平洋台风威胁，沿海输电线路可能发生严重破坏，但由于实测数据不足，往往无法准确估计台风气候下的极值风速。采用基于随机森林的全路径模拟方法开展西北太平洋台风随机模拟，并基于YM风场模型开展台风风场模拟，获取温州市一输电线路场地50年和100年重现期下的极值风速分别为33.7 m/s和35.8 m/s。分别绘制温州市和乐清市台风设计风速分布图，结果表明内陆地区台风风速呈向内递减趋势。进一步分析微地形对台风极值风速的影响规律，使用计算流体力学（CFD）方法计算真实地形下风速加速比，并对极值风速分布图进行修正。台风极值风速经修正后有大幅提升，说明微地形区域对台风风速具有显著增强作用。
- 极值风速 /
- 微地形 /
- 加速比 /
- 台风模拟 /
- 随机森林
Abstract: The southeastern coastal region of China faces the threat of typhoons from the Northwest Pacific every year， and coastal transmission lines may suffer severe damage. However， due to insufficient measured data， it is often impossible to accurately estimate the extreme wind speed in typhoon climates. A full-path simulation method based on random forest was used to simulate typhoons in the Northwest Pacific， and the YM wind field model was used to carry out typhoon wind field simulations. The extreme wind speeds of a transmission line site under 50-year and 100-year return periods were obtained as 33.7 m/s and 35.8 m/s， respectively. The distribution maps of the extreme wind speeds in Wenzhou and Yueqing were plotted， which suggested that typhoon wind speeds in inland areas showed a decreasing trend. The impacts of microtopography on the extreme wind speeds of typhoons were further analyzed. The computational fluid dynamics （CFD） method was used to calculated the acceleration ratio of the wind speed under real topography to subsequently correct the extreme wind speed distribution map. The corrected results revealed a significant increase in the extreme wind speed， indicating the microtopographic region had a notable amplifying effect on the typhoon design wind speed.
- extreme wind speed /
- microtopography /
- acceleration ratio /
- typhoon simulation /
- random forest

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