摘要
随着电网持续高速发展,输电通道运行环境日趋复杂,其中微地形区域输电线路发生风偏、舞动等故障的风险更为突出。针对地形抬升、垭口2种易致灾典型微地形特征区域,建立仿真计算模型,对风场分布特性进行分析,获得微地形区域内不同位置、离地不同高度的风场变化规律,包括风速随地形的变化趋势、形成最大风速的位置、最大风速与来流风速的比值,并基于仿真结果建立了2种典型微地形下不同位置的风速修正系数计算公式,研究结果在实际应用中能够根据观测数据推算微地形区域线路杆塔、导线所处位置的实际风速值,为输电线路的抗风设计、以及强风灾害风险的预测提供理论支撑,有助于提高输电线路强风灾害的防御水平。
With the continuous and rapid development of the power grid,the operating environment of transmission channels is becoming increasingly complex,in which the risk of faults such as wind deflection and swinging of transmission lines in the areas of microtopography becomes more prominent.For the two typical microtopography feature areas prone to disasters,namely terrain uplift and mountain passes,this paper constructs a simulation calculation model to analyze the distribution characteristics of the wind field,obtaining the variation laws of the wind field at different positions and at different heights above the ground within the area of microtopography,including the variation trend of wind speed with terrain,the position where the maximum wind speed is formed,and the ratio of the maximum wind speed to the incoming wind speed.Finally,based on the simulation results,the paper establishes two calculation formulas for wind speed correction coefficients at different positions in typical area of micro topography.The research results can be used in practical applications to calculate the actual wind speed values at the locations of line towers and conductors in the areas of microtopography based on observational data,thus providing theoretical support for the wind-resistant design of transmission lines and the risk prediction for strong wind disaster,which is conducive to improving the defense level of strong wind disasters on transmission lines.
作者
白冰洁
张波
周林帆
张弛
韩冬
林卿
BAI Bingjie;ZHANG Bo;ZHOU Linfan;ZHANG Chi;HAN Dong;LIN Qing(State Grid Electric Power Research Institute(NARI Group)Co.,Ltd.,Nanjing Jiangsu 211106,China;Wuhan NARI Limited Co.,Ltd.,State Grid Electric Power Research Institute,Wuhan Hubei 430206,China;Electric Power Research Institute,State Grid Zhejiang Electric Power Co.,Ltd.,Hangzhou Zhejiang 310014,China)
出处
《湖北电力》
2025年第2期23-29,共7页
Hubei Electric Power
基金
国家电网有限公司总部科技项目(项目编号:5200-202319382A-2-3-XG)。
关键词
微地形
风速
风场分布特性
输电线路
风洞试验
area of microtopography
wind speed
wind field distribution characteristics
transmission lines
wind tunnel test
