Study on galloping characteristics of low wind pressure conductors under different wind speed conditions

As a critical component of power systems, transmission lines increasingly traverse complex terrains and harsh environments with the continuous expansion of power grids. The growing incidence of ice-induced galloping failures necessitates a thorough investigation into the galloping characteristics of ice-coated conductors. This study focuses on low wind pressure conductors, a novel structural type with superior aerodynamic characteristics. To examine their ice galloping behavior, we developed a numerical model of ice-accreted low wind pressure conductors to calculate aerodynamic force data. From the perspective of energy conservation, a three-degree-of-freedom galloping equation was established based on Lagrangian equations. The governing equations were discretized using the Galerkin method and subsequently solved through the Runge-Kutta algorithm to obtain time-history displacement responses. Comparative analysis with conventional conductors under varying wind speeds demonstrates the distinctive galloping characteristics of low wind pressure conductors, providing crucial data support for their anti-galloping applications in transmission lines.