Ice shedding from conductors may cause a significant vertical vibration of a transmission line, which may lead to interphase flashover and thereby endanger power transmission. To design a reasonable electric insulation clearance, it requires an accurate estimation of the largest jump height of a conductor following ice shedding, which might be affected by wind actions. This study investigates the coupling effects of wind action and ice shedding on the jump height of an iced conductor. Wind tunnel tests were carried out to obtain aerodynamic force coefficients of the iced conductor with crescent sections. The dynamic responses of a practical extra-high voltage (EHV) transmission line subject to joint actions of ice-shedding and wind were analyzed by numerical simulation. The influence of wind actions, accreted ice thickness, and ice shedding rate were investigated and discussed on the largest jump height of conductors. An empirical formula for estimating the largest jump height was proposed considering the ice-wind joint effects. The accuracy and applicability of the proposed formula were validated through experimental and simulation data.

导体上的冰脱落可能导致输电线路的显着垂直振动，这可能导致相间闪络，从而危及电力传输。为了设计合理的电绝缘间隙，需要准确估计冰脱落后导体的最大跳跃高度，这可能会受到风作用的影响。本研究调查了风作用和冰脱落对结冰导体跳跃高度的耦合影响。进行风洞试验以获得具有新月形截面的结冰导体的空气动力系数。通过数值模拟分析了一条实用的超高压（EHV）输电线路在融冰和风的共同作用下的动态响应。风作用、积冰厚度的影响，对导体最大跳高进行了调查和讨论。考虑到冰风联合效应，提出了估计最大跳跃高度的经验公式。通过实验和仿真数据验证了所提公式的准确性和适用性。