线路布置方式对悬垂绝缘子串摇摆角计算的影响

在输电线路的风偏计算中,导线的重力荷载和风荷载直接影响着悬垂绝缘子串摇摆角,其大小与线路的布置方式（如相邻导线悬挂点的约束、档距、高差等因素）有关。针对耐张塔-直线塔-耐张塔、直线塔-直线塔-直线塔、耐张塔-直线塔-直线塔这3种不同的线路布置方式,建立了2档、4档和6档绝缘子串-导线数值模型,通过改变档距、高差和风速等因素,仿真得到了绝缘子串摇摆角的大小和水平位移,并将其与静力学模型得出的摇摆角和水平位移进行比较,分析了不同的线路布置方式对悬垂绝缘子串摇摆角计算结果的影响,并针对不同的线路布置方式提出了相应的摇摆角计算方法。

The Influence of Transmission Line Arrangements on the Swing Angle of Suspension Insulator Sring

In calculation of transmission line windage yaw, the swing angle of suspension insulator strings is influenced by the gravity load and wind load of conductors and its magnitude is related to the arrangements of transmission lines,such as the constraints of neighboring conductor’s hanging points, the span and elevation difference. Based on three different arrangements of transmission lines, including the strain tower-tangent tower-strain tower, tangent tower-tangent tower-tangent tower and strain tower-tangent tower-tangent tower,the insulator string-conductor numerical models of two spans, four spans and six spans were established respectively and the swing angle and horizontal displacement of suspension insulator strings were obtained with simulation by changing the span, elevation difference and wind speed. By comparing the results with the swing angle and horizontal displacement calculated by static mechanical model, the influence of different arrangements of transmission lines on the swing angle of suspension insulator strings are analyzed and respective calculation methods of swing angles are proposed for different transmission line arrangements.