Numerical Simulation of Iced Conductor Galloping

Abstract

Galloping of overhead power transmission conductor is a harmful wind-induced vibration characterized by low-frequency, high-amplitude and long-duration. It happens when the non-uniformed ice coated conductor is attacked by wind with certain speeds. Many factors such as initial wind attack angle, wind speed, conductor size, ice shape, span, tower constrain, and wire tension determine the occurrence and behavior of galloping. In this paper, a method to simulate galloping is developed based on Den Hartog theory and explicit finite element method. The influence of wind speed and initial attack angle on the occurrence and amplitude of galloping is studied.