MODELLING CABLE DYNAMICS EXEMPLIFIED BY LOAD TRANSPOSITION OF INSULATOR STRINGS IN OVERHEAD LINES

This paper outlines perspectives and different approaches for describing mechanical behavior of cable dynamics. The characteristics of insulator strings in overhead lines during load transposition is important for a save and fast dimensioning process. Conclusive simulation results are rooted in an adequate model of the conductor cable. In this paper linear and nonlinear cable models, based on the FEM approach are compared to analytical and numerical models based on the equation of vibrating string. This comparison of models with different levels of complexity provides valuable insights on the quality of results (in this case the force response of cable at the end). All models are implemented, validated by bench tests and coupled with a Multi Body Simulation model of the falling insulator string. Results are shown and ratings of all presented models are provided. In addition to the problem of load transposition in overhead lines, this paper gives advices on simulating cable dynamics in other fields of applications like structural engineering, materials handling or mechanical engineering. Thus the paper can help the reader to choose the right cable model for simulating a particular problem