Dynamic response parameters prediction models of isolated-span conductor lines in ultra-heavy ice zones after ice-shedding

The design ice thickness for the ultra-high voltage DC lines in ultra-heavy ice zones may arrive at 60 mm - 80 mm, and isolated-span lines are usually employed. In this paper, the finite element models of the ultra-high voltage DC lines in ultra-heavy ice zones were set up, the dynamic responses of the lines with different span length, elevation difference ratio under different ice thickness, ice-shedding rate and wind speed were numerically simulated, and the dynamic response characteristics were analyzed. The conductor jump height envelop, transverse swing amplitude and axial unbalanced tension were defined. Combining numerical simulations and the BP (back propagation) neural network algorithm, the prediction models for the dynamic response parameters with span length, elevation difference ratio, ice thickness, ice-shedding rate and wind speed as input were established. The prediction models provide instruction for the tower head design of the ultra-high voltage DC lines in ultra-heavy ice zones. © 2024 Chinese Vibration Engineering Society. All rights reserved.