Analysis of Ice-Shedding Vibration Characteristics of Short-Circuit Conductors in Transmission Tower-Line System

The tower-line system is taken as the research object to study the vibration characteristics of ice shedding of transmission lines. The Lagrange equation based on the energy and the assumed mode methods establishes the mathematical model of ice-shedding vibration of short-circuit conductors in the tower-line systems, considering different ice-shedding conditions, parameter attributes, and other factors. The improved Euler method is used to solve the established mathematical model using MATLAB software. The tower-line system's finite element simulation model is established using Solidworks modeling software and ANSYS finite element analysis software. The transient response analysis of ice-shedding vibration is carried out under the same boundary conditions, attribute parameters, and ice-shedding conditions as the mathematical model. The accuracy of the mathematical model is verified by comparing the solution results of the mathematical model with the simulation analysis results under the same working conditions. Based on the established mathematical model of the ice-shedding vibration of the tower-line system, the vibration displacement and stress time-history curves of the short-circuit wire of the tower-line system under the corresponding working conditions are calculated by adjusting the parameters such as the ice-shedding conditions. The displacement and stress variations of the midpoint of the short-circuit wire that are most affected by the ice-shedding vibration are extracted, and the ice-shedding vibration characteristics of the tower-line system under different influencing factors are further analyzed and summarized.