摘要
特高压8分裂导线在风场作用下的干扰效应对导线风荷载的合理化设计非常重要。为研究该干扰效应,设计制作了特高压多分裂导线模型,进行了不同风场环境下多分裂导线的风荷载特性测试。试验采用高频测力天平测得不同风场下多分裂导线模型的3分量力,继而获得导线各种风场下阻力系数。通过比较不同导线形式、迎风方向,研究了多分裂导线在风场下的干扰效应,得到了导线风荷载随分裂导线数、雷诺数变化规律。试验结果表明8分裂导线的干扰效应显著,实测风荷载结果较现行规范计算结果有明显降低,表明现行规范中的8分裂导线风荷载计算方法偏于保守。特高压8分裂导线等效风荷载的合理化计算可以考虑干扰效应的影响。
In order to obtain the rational wind loads,it is necessary to study the interference effects of 8-bundled conductors of UHV transmission lines under wind effect.Taking 8-bundled conductors in a 1000kV transmission line as the prototype,we set up multi-bundled conductor models.By using high frequency multi-axis force sensor,wind loading characteristics of these models were tested in the wind tunnel under different wind fields.Drag coefficients were obtained and compared for different multi-bundled conductors.The wind actions on bundled conductors related to the number of bundles and Reynolds number were obtained and interference effect was studied by comparison of the results under different conductor configurations and wind attack angle.Test results show that there exists an obvious interference effect in large cross-section 8-bundled conductor.The wind load calculation method of the current code is conservative for 8-bundle conductor.The measured wind action on the conductor is smaller than that of the current design code.It is suggested that the rational calculation of wind load of 8-bundled conductor can consider the interference effect.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2011年第9期2126-2132,共7页
High Voltage Engineering
基金
国家自然科学基金(5050802650778135)
教育部霍英东教育基金会资助课题~~
关键词
特高压(UHV)
8分裂导线
刚体模型
风洞试验
干扰效应
阻力系数
ultra high voltage（UHV）
8-bundled conductor
rigid model
wind tunnel test
interference effect
drag coefficient
