Optimization of the Efficiency of Aeolian Vibration Dampers

Stockbridge-type aeolian vibration dampers, if properly chosen and applied, have proven to be effective to protect overhead lines from harmful wind-induced vibrations. However, conventional dampers with bolted clamps may have shortcomings in damping high frequency vibrations of small diameter optical ground wires (OPGW) due to their high clamp mass. Theoretical considerations based on wave impedance analysis predict that reduction of damper clamp mass should be beneficial for damping efficiency at high frequencies. A damper clamp designed for attachment by means of helical factory-formed rods is introduced, leading to a considerable reduction of damper clamp mass. Measurements of power dissipation characteristics using testing techniques described in IEEE Std 664 confirm the predicted improvement of damper performance at higher frequencies.