Numerical Simulation of Icing Broken Lines of Long-span Transmission Tower-Line System

In order to simulate lines disconnection of long-span transmission tower-line system,this paper takes a tension segment(five-towers-four-lines) of 1 000 kV Jindongnan-Nanyang-Jingmen UHV transmission lines crossed the Yellow River for an example.ANSYS software is used to establish finite element model of tower-line system.And the structural analysis software ANSYS/LS-DYNA is applied to simulate the line disconnection impact process under conditions of 10 mm thickness icing and without icing.Then the axial force of corresponding position and displacement response of the transmission tower are extracted.The results show that the impact of icing lines disconnection on cross arm,ground wire stand and crank arm is large.Finally,it calculates the impact factor of the above locations.