E DIN EN 50641-1 VDE 0115-641-1:2026-06

This document specifies requirements for the acceptance of simulation tools used for the assessment of design of electric traction power supply systems with respect to EN 50388-1:2022, Clause 8.
This document is applicable to the simulation of AC and DC electric traction power supply systems. The methods and parameters defined in this document are only intended for use in the validation of tools applied for the design of the electric traction power supply system, for all envisaged railway networks including those concerned by the TSI energy subsystem.
This document does not deal with validation of simulation tools by measurement.
This document focuses on the core simulation functions comprising the equations and functions which calculate the mechanical movement of trains and also which calculate the load flow of the electrical traction power supply system. In doing so this document provides all requirements necessary to demonstrate that a simulation tool may be used for the purposes of TSI approval of electric traction power supply systems. Any simulation tool which meets the acceptance requirements of the test cases in this document can be used to determine TSI compatibility for all systems of the same voltage and frequency without any requirement for further validation as part of the TSI assessment process.