The visual impact on the environment of high-voltage overhead lines can be reduced by using new, more attractive, compact overhead lines. The presented research is focused on the spatial modelling of the dynamic response of a compact overhead line simulated as an interconnected moving mechanical system with nonlinear theory using the absolute nodal coordinate formulation, which is a finite-element method developed for the analysis of large deformations and rotations. The contribution to the state of the art is the upgrading existing absolute nodal coordinate formulation model procedure, where starting from the Bernoulli-Euler beam energy
equation for the generalised elastic forces, without restrictions on the strain-bend-displacement relationship, derived equations based on the pre-computed matrices and vectors, results in a much lower computational cost. The second contribution is a complete and mathematically transparent model for a dynamic analysis of the overhead lines, based on the ANCF method. The presented procedure is relatively simple and intuitive for everyday design purposes.