输电线路导线阵风响应系数研究  

Gust response coefficients of transmission line conductor

作　　者：杨风利 张宏杰 王飞 黄国 YANG Fengli;ZHANG Hongjie;WANG Fei;HUANG Guo(China Electric Power Research Institute,Beijing 100055,China)

机构地区：[1]中国电力科学研究院有限公司,北京100055

出　　处：《振动与冲击》2021年第5期85-91,共7页Journal of Vibration and Shock

基　　金：国家电网公司总部科技项目资助(GCB17201700135)。

摘　　要：采用阵风荷载因子法推导了不同档数、影响线函数下输电线路导线阵风响应系数的计算公式,研究了湍流积分尺度、风速、档距、共振响应分量、分离系数和峰值因子等因素对导线阵风响应系数的影响规律,并将其与现行ASCE规范和中国规范的导线阵风响应系数进行了比较分析。分析结果表明,计算导线跨中位移和输电塔风致响应时,应分别考虑单档和相邻两档导线上的风场不完全相关性。影响线函数采用线性函数或正弦函数时,其差异对导线阵风响应的影响可以忽略。与风速和湍流积分尺度相比,档距对导线阵风响应系数的影响更为显著,档距由100 m增至1000 m时,导线阵风响应系数至少降低了20%。忽略导线共振响应分量影响,导线阵风响应系数会偏小5%以上。峰值因子对导线阵风响应的影响较为显著,峰值因子按照ASCE规范取3.6比按照DL/T 5551—2018规范取2.5计算得到的导线阵风响应系数高8.6%。Here,calculation formulas for gust response coefficients of transmission line conductor under various span numbers and influence line functions were derived based on the gust load factor method.The effect laws of turbulence integral scale,wind speed,span,resonant response component,separation coefficient and peak factor,etc.on conductor gust response coefficients were studied.The calculated gust response coefficients were compared with those in the present ASCE standard and our country’s standard.The results showed that when calculating the mid span displacement of conductor and the wind-induced response of transmission tower,the incomplete correlation of wind field on a single span conductor and adjacent two-span conductors should be considered,respectively;when the influence line function is linear or sinusoidal,the influence of their difference on gust response of conductor can be ignored;compared with wind speed and turbulence integral scale,span has a more significant effect on gust response coefficient of conductor;when span increases from 100 m to 1000 m,gust response coefficient of conductor decreases by at least 20%;if the influence of resonance response component is ignored,gust response coefficient of conductor decreases by more than 5%;the peak factor has a more significant impact on gust response of conductor,gust response coefficient of conductor during peak factor being equal to 3.6 according to ASCE standard increases by about 8.6%than that during peak factor being equal to 2.5 according to DL/T 5551—2018 standard.

关 键 词：阵风响应 联合接纳函数 档距 湍流积分尺度 影响线 

分 类 号：TM75[电气工程—电力系统及自动化]