Analysis of Response and Dynamic Stability of Terminal Tower-Line System in Wind Farm under Wind and Ice Combined Loads

The stable operation of wind farms is important for achieving sustainable development and environmental protection. To understand the wind and ice response characteristics of the terminal tower-line system in a wind farm. A spatial finite element model of the terminal tower-line system of a 35 kV wind farm was established, and the harmonic superposition method was employed to simulate the fluctuating wind load time history of the system. By superimposing static wind loads, the characteristics of the wind-induced vibration response and the dynamic stability of the ice-covered tower-line system under different wind direction angles were analyzed. The results indicated that, compared to a single tower structure, the tower-line coupling effect has a more significant impact on the wind-induced vibration response of the terminal tower-line system. The most unfavorable wind direction is perpendicular to the conductor arrangement, and the maximum stress on the tower occurs on the windward side where the conductor is attached. The tension of the conductor has the greatest impact on the terminal tower, and this effect is further amplified by conductor icing and galloping. Finally, a method is proposed to assess the dynamic stability of terminal tower-line systems based on yield criteria. © 2025 Institute of Electrical Engineers of Japan and Wiley Periodicals LLC.