Convergence Study for the Simulation of Stitched Railway Catenary Dynamics and Design Verification of a High-Speed System for Sweden

This paper describes the results of a parametric convergence study on dynamic pantograph-catenary interaction simulations performed with the simulation tool CaPaSIM 3D.The convergence study has been part of validating the latest version of CaPaSIM 3D following EN 50318:2018.The effects of adjusting parameters in the simulation setup on the results are shown and how they can be chosen to obtain results within the required ranges for all relevant metrics for verifying a new system design.However, the convergence study also shows that some of the specified result ranges for the simulation of stitched catenary systems conflict with convergence trends for the performed simulations.These conflicts are described and discussed.In addition, simulation results verifying the dynamic interaction characteristics of the design proposal for a new Swedish overhead catenary system for high speeds are shown.These results show that the system design is expected to fulfil the requirements of the TSI Energy.General conclusions regarding the implications of studying overlap sections and multiple pantograph operation are drawn from this example.