In-plane dynamic interaction between a tower and conductors at lower frequencies

Abstract Transmission line system can be represented by several analytical models composed of towers and conductors. The contribution of normal modes of a conductor to the dynamic tension force transmitted to a tower is obtained by using a frequency response function of tensions devised for the coupled systems. The in-plane dynamic interaction between a tower and conductors is investigated with varying support stiffness. A representation of the mechanism of the in-plane free vibration of transmission line systems is proposed which covers a wide frequency range.