螺旋线防舞阻尼器对集电导线风荷载特性的影响研究  

Impact of Anti-Galloping Damper on Wind Load Characteristics of Wind Farm Collection Lines

作　　者：张小贝 雷原 徐庆鸿 丁为 党会学[2] 姜自国 ZHANG Xiaobei;LEI Yuan;XU Qinghong;DING Wei;DANG Huixue;JIANG Ziguo(Huaneng Dingbian New Energy Generation Co.,Ltd.,Xi′an 710061,China;School of Civil Engineering,Chang′an University,Xi′an 710061,China;Huaneng Huili Wind Power Co.,Ltd.,Xi′an 710075,China)

机构地区：[1]华能定边新能源发电有限公司,陕西西安710061 [2]长安大学建筑工程学院,陕西西安710061 [3]华能会理风力发电有限公司,陕西西安710075

出　　处：《电工技术》2025年第3期46-51,55,共7页Electric Engineering

基　　金：中国华能集团有限公司总部科技项目(编号HNKJ22-H20)。

摘　　要：安装螺旋线防舞阻尼器可以有效抑制集电线路舞动响应,但也会导致其风荷载系数与规范规定值有明显差异。为此,采用数值模拟方法分析了螺旋线防舞阻尼器的螺距、来流风速对风荷载特性的影响。对比不同规范的风荷载系数值与CFD结果可知,螺距≤14 D时,雷诺数对体型系数影响明显;螺距>14D后,螺距及雷诺数增加均使得体型系数明显增加;安装螺旋线阻尼器显著降低了导线脉动力幅值但几乎不影响脉动力峰值频率。机理分析结果表明,防舞器螺旋线引导来流绕过导线表面,对导线背风侧绕流起到了能量输入,从而沿螺旋线形成了稳定的展向压力梯度场。它不仅抑制了沿导线展向的三维流动效应,而且抑制了导线背风面的分离涡振荡,从而显著降低了脉动载荷幅值。Anti-galloping dampers installed on collection lines can effectively suppress galloping but also significantly alters its wind load characteristics.To address this problem,the authors solved the Navier-Stokes equations based on fully structured mesh,to obtain the unsteady flow field and extracting the aerodynamic load time histories.The impact and mechanism of these dampers on wind load characteristics are discussed.It is indicated that dampers with various helical pitches can significantly reduce the pulsating amplitude of conductor aerodynamic forces without noticeably varying the Strouhal number.By comparing the drag coefficient values from different standards and CFD results,it is revealed that the helical wrapping significantly increases the conductor′s drag coefficient.The effects of helical pitch and Reynolds number on aerodynamic loads should be accounted for in the wind-resist design.By employing spatial streamlines around cross-sections,the influencing mechanism can be demonstrated as that,the helical wrapping guides the incoming flow around the conductor surface,introduces energy to the leeside vortex wake of the conductor,forming a stable spanwise pressure gradient field along the helical wrap.This suppresses the three-dimensional flow along the cylinder span direction as well as the oscillations of separated vortices on the upper and lower surfaces of a smooth cylinder.

关 键 词：集电线路阻尼器 风荷载特性 数值模拟 螺旋线 

分 类 号：TM75[电气工程—电力系统及自动化]