基于三维场景的输电线路典型微地形、微气象区设计风速分析  

Analysis on Design Wind Speed of Transmission Line of Typical Micro-topography and Micro-meteorology Regions Based on 3D Scene

作　　者：孟佳佳 张新燕 苟伟 MENG Jiajia;ZHANG Xinyan;GOU Wei(Gansu Diantong Electric Power Engineering Design&Consultation Co.,Ltd.,Lanzhou 730030,China)

机构地区：[1]甘肃电通电力工程设计咨询有限公司,甘肃兰州730030

出　　处：《电力勘测设计》2024年第5期79-82,共4页Electric Power Survey & Design

摘　　要：气象条件是输电线路设计必须考虑的关键因素之一,微地形、微气象对输电线路的安全运行有重要影响。以实际线路工程为例,基于三维路径场景,结合现场踏勘情况,识别出沿线影响风速特性的主要微地形有地形抬升型(山丘、悬崖)和垭口型。根据山丘、悬崖和垭口三种典型微地形风速仿真分析结果,利用风速增大模型,计算得到不同微地形条件下的修正风速,从而提高线路工程设计风速的可靠性。Meteorological condition is one of the key factors that must be considered in the design of transmission lines,and micro-topography and micro-meteorology play an important role in the safe operation of transmission lines.The actual transmission line project is taken as an example in this paper.Based on the 3D path scene and combined with the field survey,the micro-topography which mainly affects wind speed characteristics along the line is identified as the types of uplift(hills and cliffs)and saddleback.According to the wind speed simulation results of three typical micro-topographies,i.e.hills,cliffs and saddle-backs,the modified wind speed under different micro-topography conditions is calculated by using the wind speed increase models,which improves the reliability of transmission line design wind speed.

关 键 词：输电线路 三维场景 微地形 微气象 设计风速 

分 类 号：P339[天文地球—水文科学] TM726[水利工程—水文学及水资源]