Studies on Entire Span Vibration and Local Deformation Characteristicsof Transmission Line under Impact Load

In order to study the entire span vibration and local deformation characteristics of transmission conductor under impact load collision, the mathematical model of entire span vibration and local deformation of transmission conductor is established. Considering the influence of conductor local deformation and conductor steel and aluminum strand on Poisson's ratio and elastic modulus, the entire span impact vibration simulation model and local impact deformation simulation model of transmission conductor are established, The macroscopic entire span vibration and local deformation of transmission line are analyzed. The results show that the maximum sag of each position on the transmission line occurs when the impact force acts on that position; The change of impact force has the greatest impact on the maximum value of sag near the suspension point and the least impact on the maximum value of sag near the center of span; Impact has the greatest impact on the outermost aluminum strand. With the deepening of impact, the deformation of each layer decreases gradually, but the deformation area increases gradually; The influence of impact velocity on the deformation of inner aluminum strand increases gradually, but the influence on the deformation of inner steel core is basically unchanged.