data-Analysis of Dynamic Response Characteristics of Transmission Conductors under Ice Shedding Impact of Ground Wires

Besides natural shedding, ground wire ice-shedding impacts more readily trigger large-scale conductor ice shedding. This paper innovatively proposes a numerical simulation method for conductor dynamic responses to ground wire ice-shedding impacts in transmission lines. Using finite element models, it studies the ice-shedding dynamics of four-bundle conductors under various impact scenarios and structural parameters, verified by a 1:20 reduced-scale model. The research indicates that under the median impact condition, the ice shedding impact of the ground wire has the greatest influence on the ice shedding of the entire conductor span. As the ice shedding impact rate increases, the growth rate of the jumping height during the ice shedding of the entire span of the conductor shows an upward trend, while the growth rate of the jumping height during the local ice shedding of the conductor remains approximately constant. Under the lateral impact condition, the maximum conductor jumping height occurs near the impact point. Finally, a formula for calculating conductor jumping height after ground wire ice-shedding impacts is proposed, which is crucial for icing-area transmission line design