10 kV配电线路抵御强台风能力的数值研究

Numerical simulation on the wind capability of 10 kV distribution lines

针对沿海地区配电线路抵御强台风能力不足的问题,对10k V配电线路抗台风的能力进行了数值研究,讨论了地基土与防风拉线对电杆防风能力的影响。采用ABAQUS/CAE建立了10k V单回路配电线路一个标准段的有限元模型,模型中包括导线、混凝土电杆、横担、拉线和地基土等;利用等效惯性加速度模拟线路所受风荷载,然后对模型在不同等级风速下进行了变形分析,通过数值解与理论解的对比,验证了数值模型的正确性。研究了3类线路的弯矩、扰度和应力等问题的变化规律,包括:考虑地基土作用、考虑拉线加固处理以及两者都没考虑的3类模型。研究结果表明,土体变形对电杆的扰度变化有叠加效应,安装拉线加固后电杆最大弯矩明显降低。

Aiming at the problem that the distribution lines＇ insufficiency of capability to withstand violent typhoon, a numerical study on the anti wind capability of 10 kV distribution lines was presented, and the effect of foundation soil and stay wire on the pole were discussed too. Firstly, A finite element model of a standard line, including the line, pole, pole arm, stay wire and foundation soil were established by ABAQUS/CAE. Then it was used to discuss the deformation under different wind speeds after the wind loading was applied by equivalent in-ertial acceleration. Comparing the numerical solutions with theoretical ones, the finite element model could be verified. Finally, the bending moment, deflection and stress distribution of the pole of three kinds of lines were investigated, which covered the effect of foundation soil, strengthened with stay wire and none of both. The results indicate that the soil deformation has superimposed effect on the deflection of pole and stay wire can decrease the maximum bending moment of pole.