IEC及GB规范在安哥拉220 kV输电线路导线风荷载计算中的对比分析

摘要

Taking a 220 kV power transmission line in Republic of Angola as example, the Code for designing of 110~750kV overhead transmission line(GB50545-2010)of China was compared with the Design criteria of over⁃head transmission lines(IEC 60826-2003). Their difference in wire wind load calculation was analyzed. The re⁃sults of calculation demonstrate that their principles of defining basic wind velocity are identical;but different reoc⁃currence periods were adopted for different voltage levels in accordance with GB code. For the wire wind load calcu⁃lation of 2C-SZ41-24 type tower, the standard wind pressure and horizontal wire wind load of IEC norm are about 1.81and 1.3 times as much as that of GB code respectively.%以安哥拉220 kV输电线路为例，将国内《110～750 kV架空输电线路设计规范》（GB 50545-2010）与国际电工委员会《Design criteria of overhead transmission lines》（IEC 60826-2003）做对比，分析两者在导线风荷载计算中的差异性。通过计算得知：IEC与GB在基本风速的确定原则一致，但是GB根据不同的电压等级采用不同的重现期；对导线风荷载，IEC计算风压标准值约为国标的1.81倍，IEC计算导线水平风荷载约为国标的1.30倍（以2C-SZ41-24型杆塔为例）。