Standards Development

Scope

This document specifies requirements for the test and acceptance of simulation tools used for the assessment of design of electric traction power supply systems according to dimensioning studies and quality index required in IEC 62313:2009.

This document is applicable to simulation tools of AC or DC electric traction power supply systems at their nominal frequency.

NOTE This document can also be applied to subway, tram and trolley bus systems.

This document focuses on the validation of the core simulation functions comprising the equations and functions which calculate • the mechanical movement of trains; and • the load flow of the electrical traction power supply system.

The tests set out in this standard are sufficient to demonstrate that a tool can be applied for the design studies required in IEC 62313:2009.

This document also specifies procedures for the modification of simulation tools, in particular the limits of applicability of acceptance when tools are modified. These procedures focus on determining whether the core functions of the simulation model are modified.

The use of a validated simulation tool in accordance with this document does not, in itself, demonstrate good practice in electric traction power supply system design, neither does it guarantee that the simulation models and data for infrastructure or trains used in the tool are correct for a given application. The choice and application of any models and data, of individual system components, in a design is therefore subject to additional verification processes and not in the scope of this document

NOTE Competent development of design models and full understanding of the limits of design tools remain requirements in any system design. This document does not reduce any element of the need for competent designers to lead the design process.

This document is not applicable to the validation of simulation tools with respect to

 • short circuit studies;

• electrical safety studies (e. g. rail potential);

• harmonic studies; • analyses of transient phenomena; and 

• electromagnetic compatibility studies over a wide frequency spectrum.

This document excludes complex models for traction power supply with stationary active components such as static frequency convertors. This document does not mandate the use of a particular simulation tool in order to validate the design of an electric traction power supply system.

This document does not deal with validation of simulation tools by measurement

Purpose

There are many software tools which can be used to simulate the behaviour of trains on a railway network running on power supplied by an electric traction power supply system. However, the methods used to obtain the results may differ significantly from each other, and no common verification method was available so far.

This standard will give a simple method that can be used to verify that the simulation tool is properly implemented, by conducting simulation with a provided input data set and comparing the obtained output with the criteria in the document. This standard will be useful for the producers of a simulation tool to verify and check if the developed tool is correct. It will also be useful for the users of the tool who can utilize the document to easily find tools that are properly designed and implemented.