Modelling Cable Vibration Following Load Removal

Cable vibration due to different load removal scenarios is modelled numerically and experimentally. The numerical model considers a conductor in one span of a transmission line, which is loaded by ice. The experimental set-up represents a small-scale model of the transmission line with ice-loaded conductor. Load removal simulates ice shedding that leads to conductor jump followed by a decaying vibration. Dynamic effects of partial ice shedding from different parts of the conductor are compared. The study reveals the increasing tendency in the maximum value of the vertical displacement and the tension in the conductor during vibration with the increasing amount of shedding load. The practical benefit from the prediction of these parameters is that they help assess to what extent the clearance reduces between vibrating conductors and what dynamic forces act in the conductor during vibration.