Experimental validation of the dynamic behavior of electrical transmission cables with non-linear modeling

Abstract

Overhead electrical transmission lines are subjected to the action of the wind, which causes a transversal vibration of the conductor and, therefore, alternating efforts. The complex mechanism of interaction between the strands of an electrical conductor subjected to alternating bending has made it difficult to calculate the real stresses. Currently, there are standards and guidelines for conducting laboratory tests where it is possible to simulate the conditions that occur in the field, in such a way that information on these parameters can be obtained, thus facilitating the study of their dynamic behavior. As detailed above, experimental measurements were carried out in order to contrast the results obtained by using a non-linear finite element model and the Poffenberger-Swart expression based on the displacement of the conductor at a defined distance from the suspension clamp. The results obtained allow us to appreciate an adequate correlation with the experimental data regarding the amplitude of displacement in the points of interest.