EN 50641:2020

Railway applications - Fixed installations - Requirements for the validation of simulation tools used for the design of electric traction power supply systems

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 TSI Energy. This document is applicable to the simulation of AC and DC electric traction power supply systems, in the frame of assessment required by Directive (EU) 2016/797. The methods and parameters defined in this document are only intended for use in the design of the electric traction power supply system, and hence this document solely considers validation of tools within the TSI energy subsystem for all envisaged railway networks. 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. This document includes controls for the modification of simulation tools, in particular the limits of applicability of certification when tools are modified. These controls focus on determining whether the core functions of the simulation model are modified. This document provides only the requirements for demonstration of the algorithms and calculations of core functions. The use of a certified 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. 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. The test cases and data shown in Clause 6 in this document do not represent an existing network, but these data are used as theoretical/virtual network only for the purpose of verification of the core functionality. NOTE A new test case will be drafted considering metro, tramways and trolleybuses using DC 600 V or DC 750 V. Until this test case is available, this document can also be applied to subway, tram and trolley bus systems. This test case will also integrate rail systems using DC 750 V. Additionally, the application of this document ensures that the output data of different simulation tools are consistent when they are using the same set of input data listed in Clause 6. This document only applies to the simulation of electric traction power supply systems characteristics at their nominal frequency for AC or DC systems. It does not consider harmonic studies, electrical safety studies (e.g. rail potential), short circuit or electromagnetic compatibility studies over a wide frequency spectrum. 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 consider complex models with active components such as static frequency convertors.

Bahnanwendungen - Ortsfeste Anlagen - Anforderungen an die Validierung von Simulationsprogrammen für die Auslegung von Bahnenergieversorgungssystemen

Applications ferroviaires - Installations fixes - Exigences relatives à la validation des outils de simulation utilisés pour la conception des réseaux d'alimentation de traction

Le présent document spécifie les exigences pour l'acceptation des outils de simulation utilisés pour évaluer la conception des réseaux d'alimentation électrique de traction conformément à la STI « Énergie ». Le présent document s'applique à la simulation des réseaux d'alimentation électrique de traction à courant continu et alternatif, dans le cadre de l'évaluation requise par la Directive (UE) 2016/797. Les méthodes et paramètres définis dans le présent document ne sont destinés qu'à être utilisés lors de la conception d'un réseau d'alimentation électrique de traction. Le présent document ne considère que la validation des outils au sein du sous-système STI Énergie pour tous les réseaux ferroviaires envisagés. Le présent document ne traite pas de la validation des outils de simulation par mesurage. Le présent document se concentre sur les fonctions de simulation clés comprenant les équations et fonctions qui calculent le mouvement mécanique des trains et qui calculent également les charges du réseau d'alimentation électrique de traction. De ce fait, le présent document fournit toutes les exigences nécessaires pour démonter qu'un outil de simulation peut être utilisé à des fins d'approbation STI des réseaux d'alimentation électrique de traction. Tout outil de simulation qui répond aux exigences d'acceptation des cas d'essai décrits dans le présent document peut être utilisé pour déterminer la compatibilité aux STI pour l'ensemble des réseaux de même tension et fréquence sans besoin d'une validation supplémentaire dans le cadre du processus d'évaluation STI. Le présent document inclut des contrôles pour la modification des outils de simulation, en particulier les limites de l'applicabilité de la certification lorsque les outils sont modifiés. Ces contrôles tâchent de déterminer si les fonctions clés du modèle de simulation sont modifiées. Le présent document fournit uniquement les exigences pour la démonstration des algorithmes et des calculs des fonctions clés. L'utilisation d'un outil de simulation certifié en conformité avec le présent document ne démontre pas, en elle-même, une meilleure pratique de conception d'un réseau d'alimentation électrique de traction, et ne garantit aucunement que les données et modèles de simulation pour les infrastructures et trains utilisés dans l'outil sont adaptées à une application spécifique. Le choix et l'application de toute donnée et de tout modèle, de composants systèmes individuels, dans une conception sont donc sujets à des processus de vérification supplémentaires non couverts par le présent document. Le développement compétent de modèles de conception et la compréhension complète des limites des outils de conception restent des exigences pour toute conception d'un système. Le présent document n'a pas pour vocation à limiter le besoin en concepteurs compétents pour piloter le processus de conception. Les cas d'essai et les données illustrés à l'Article 6 du présent document ne représentent aucunement un réseau existant, mais ces données sont utilisées comme un réseau théorique/virtuel uniquement aux fins de vérification des fonctionnalités clés. NOTE Un nouveau cas d'essai sera développé pour le métro, les tramways et les trolleybus fonctionnant sous un courant continu compris entre 600 V et 750 V. En attendant la diffusion de ce cas d'essai, le présent document peut être appliqué au métro, aux tramways et aux trolleybus. Ce cas d'essai intégrera également les systèmes ferroviaires fonctionnant avec un courant continu de 750 V. (...)

Železniške naprave - Stabilne naprave električne vleke - Zahteve za ocenjevanje simulacijskih orodij za snovanje elektroenergetskih napajalnih sistemov električne vleke

General Information

• Status: Published
• Publication Date: 09-Jan-2020
• Withdrawal Date: 03-Nov-2022
• ICS: 29.280 - Electric traction equipment
• Technical Committee: CLC/TC 9X - Electrical and electronic applications for railways
• Drafting Committee: CLC/SC 9XC - Electric supply and earthing systems for public transport equipment and ancillary apparatus (fixed i
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 10-Jan-2020
• Due Date: 01-Dec-2019
• Completion Date: 10-Jan-2020
• Directive: 2008/57/EC - Directive 2008/57/EC of the European Parliament and of the Council of 17 June 2008 on the interoperability of the rail system within the Community (Recast)
• Directive: 2016/797/EU - Directive (EU) 2016/797 of the European Parliament and of the Council of 11 May 2016 on the interoperability of the rail system within the European Union (Text with EEA relevance)
• Mandate: M/483 - Mandate for programming and standardisation addressed to the European standardisation bodies under directive 2008/57/EC in the field of the interoperability of the rail system within the European Union
• Ref Project: SIST EN 50641:2020 - Railway applications - Fixed installations - Requirements for the validation of simulation tools used for the design of traction power supply systems

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 50641:2020
01-maj-2020
Železniške naprave - Stabilne naprave električne vleke - Zahteve za ocenjevanje

simulacijskih orodij za snovanje elektroenergetskih napajalnih sistemov električne

vleke

Railway applications - Fixed installations - Requirements for the validation of simulation

tools used for the design of traction power supply systems
Bahnanwendungen - Ortsfeste Anlagen - Anforderungen für die Validierung von
Simulationsprogrammen für die Auslegung von Bahnenergieversorgungssystemen

Applications ferroviaires - Installations fixes - Exigences relatives à la validation des

outils de simulation utilisés pour la conception des systèmes d’alimentation de la traction

Ta slovenski standard je istoveten z: EN 50641:2020
ICS:
29.280 Električna vlečna oprema Electric traction equipment
SIST EN 50641:2020 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 50641:2020
---------------------- Page: 2 ----------------------
SIST EN 50641:2020
EUROPEAN STANDARD EN 50641
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2020
ICS 29.280
English Version
Railway applications - Fixed installations - Requirements for the
validation of simulation tools used for the design of electric
traction power supply systems

Applications ferroviaires - Installations fixes - Exigences Bahnanwendungen - Ortsfeste Anlagen - Anforderungen für

relatives à la validation des outils de simulation utilisés pour die Validierung von Simulationsprogrammen für die

la conception des réseaux d'alimentation de traction Auslegung von Bahnenergieversorgungssystemen

This European Standard was approved by CENELEC on 2019-11-04. CENELEC members are bound to comply with the CEN/CENELEC

Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC

Management Centre or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation

under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the

same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,

Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the

Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN 50641:2020 E
---------------------- Page: 3 ----------------------
SIST EN 50641:2020
EN 50641:2020 (E)
Contents Page

European foreword .......................................................................................................... 4

1 Scope ........................................................................................................................ 5

2 Normative references ................................................................................................ 6

3 Terms and definitions ................................................................................................ 6

4 Symbols and abbreviated terms ................................................................................. 8

5 General ..................................................................................................................... 9

6 Test and models description .................................................................................... 12

6.1 General .......................................................................................................... 12

6.2 Common parameters ...................................................................................... 12

6.3 Train set descriptions ..................................................................................... 13

6.3.1 Type of train set and mechanical characteristics ................................. 13

6.3.2 Traction and braking effort characteristics .......................................... 14

6.3.3 Current limitation in traction ................................................................ 15

6.3.4 Current limitation in regenerative braking ........................................... 15

6.3.5 Additional information for the train set models .................................... 16

6.4 Parameters for DC models ............................................................................. 16

6.4.1 Track layout model ............................................................................. 16

6.4.2 Train traffic model .............................................................................. 17

6.4.3 Electrical infrastructure model ............................................................ 18

6.5 Parameters for AC models ............................................................................. 20

6.5.1 Track layout model ............................................................................. 20

6.5.2 Train traffic model .............................................................................. 21

6.5.3 Electrical infrastructure model ............................................................ 22

6.5.4 Transformer model ............................................................................. 22

6.5.5 AC electrical infrastructure complement and multi-conductor model .... 24

7 Plausibility of expected outputs ............................................................................... 26

7.1 General .......................................................................................................... 26

7.2 Validation of driven timetable ......................................................................... 26

7.3 Complementary Information on train journeys ................................................. 28

7.4 Complementary Information for substation results .......................................... 31

8 Verification of expected output ................................................................................ 33

8.1 General .......................................................................................................... 33

8.2 Train results ................................................................................................... 34

8.3 Substation results ........................................................................................... 35

9 Validation with simulated values .............................................................................. 36

10 Assessment ............................................................................................................. 37

Annex A (normative) Substation outage, Train output results: validation boundary

value ....................................................................................................................... 39

Annex B (normative) Substation outage, Substation output results: validation boundary

values ..................................................................................................................... 46

Annex C (informative) Determination of reference values and their tolerances .............. 50

C.1 Tolerances for determination of applied boundary values ........................................ 50

C.2 Determination of reference values ........................................................................... 51

---------------------- Page: 4 ----------------------
SIST EN 50641:2020
EN 50641:2020 (E)
Annex D (informative) Individual graphs for each system and operating condition

infrastructure ........................................................................................................... 52

Annex ZZ (informative) Relationship between this European Standard and the Essential

Requirements of Directive (EU) 2016/797 aimed to be covered ............................... 68

Bibliography ................................................................................................................... 69

---------------------- Page: 5 ----------------------
SIST EN 50641:2020
EN 50641:2020 (E)
European foreword

This document (EN 50641:2020) has been prepared by CLC/SC 9XC “Electric supply and earthing systems

for public transport equipment and ancillary apparatus (Fixed installations)”, of Technical Committee

CLC/TC 9X “Electrical and electronic applications for railways”.
The following dates are fixed:
• latest date by which this document has to be (dop) 2020-11-04
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) 2022-11-04
conflicting with this document have to be
withdrawn

This document has been prepared under a mandate given to CENELEC by the European Commission and

the European Free Trade Association, and supports essential requirements of EU Directive(s).

For the relationship with EU Directive(s) see informative Annex ZZ, which is an integral part of this

document.

Experts representing approximately ten member states worked to draft a complete new document. The

results and data are taken from the most well-known representative simulation softwares in Europe and

related experts. This document provides a means of assessing simulation tools and provides assurance to

anyone who depends upon their output. Future versions will include other cases such as urban traffic.

---------------------- Page: 6 ----------------------
SIST EN 50641:2020
EN 50641:2020 (E)
1 Scope

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 TSI Energy.

This document is applicable to the simulation of AC and DC electric traction power supply systems, in the

frame of assessment required by Directive (EU) 2016/797. The methods and parameters defined in this

document are only intended for use in the design of the electric traction power supply system, and hence

this document solely considers validation of tools within the TSI energy subsystem for all envisaged railway

networks.
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.

This document includes controls for the modification of simulation tools, in particular the limits of applicability

of certification when tools are modified. These controls focus on determining whether the core functions of

the simulation model are modified.

This document provides only the requirements for demonstration of the algorithms and calculations of core

functions. The use of a certified 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. 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.

The test cases and data shown in Clause 6 in this document do not represent an existing network, but

these data are used as theoretical/virtual network only for the purpose of verification of the core

functionality.

NOTE A new test case will be drafted considering metro, tramways and trolleybuses using DC 600 V or DC 750 V.

Until this test case is available, this document can also be applied to subway, tram and trolley bus systems. This test

case will also integrate rail systems using DC 750 V.

Additionally, the application of this document ensures that the output data of different simulation tools are

consistent when they are using the same set of input data listed in Clause 6.

This document only applies to the simulation of electric traction power supply systems characteristics at

their nominal frequency for AC or DC systems. It does not consider harmonic studies, electrical safety

studies (e.g. rail potential), short circuit or electromagnetic compatibility studies over a wide frequency

spectrum. 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 consider complex models with active components such as static frequency

convertors.
---------------------- Page: 7 ----------------------
SIST EN 50641:2020
EN 50641:2020 (E)
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes

requirements of this document. For dated references, only the edition cited applies. For undated references,

the latest edition of the referenced document (including any amendments) applies.

EN 50163:2004, Railway applications - Supply voltages of traction systems

EN 50388:2012, Railway Applications - Power supply and rolling stock - Technical criteria for the

coordination between power supply (substation) and rolling stock to achieve interoperability

3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN 50163:2004, EN 50388:2012 and

the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
assessor
entity that carries out an assessment
[SOURCE IEC 60050-821:2017, 821-12-05]
3.2
electric traction system
electric traction power supply system
railway electric distribution network used to provide energy for rolling stock

[SOURCE: IEC 60050-811:2017, 811-36-21, modified – “electric traction power supply system” has been

added as synonym and the Note 1 to entry has been removed.]
3.3
proposer
organization which proposes the simulation and validation
Note 1 to entry: This will normally be the software owner and or developer.
3.4
simulation accuracy

indicator dedicated to the characterization of the accuracy of the simulation output regarding a reference

(measure or theoretical model) for a given case
3.5
simulation method

construction and solution of a numerical time-step or space-step model of train movement and electric

traction power supply performance
3.6
simulation tool
software implementing a simulation method(s)
---------------------- Page: 8 ----------------------
SIST EN 50641:2020
EN 50641:2020 (E)
3.7
software quality management
management system for software to be updated
Note 1 to entry: The processes are the following:

— software development process comprising the steps of development request, software test, release;

— life cycle process with the steps release plan, versioning with code protection and changelog, bug tracking,

documentation (user manual, help system, developer's guide if any).
3.8
track layout model

model describing the physical characteristics of the track such as curves, tunnels and gradient description

3.9
train set
combination of vehicles coupled together
Note 1 to entry: Vehicle includes banking locomotives.
3.10
train set model
model describing the electrical and mechanical characteristics of the train set
3.11
train traffic model
model of the train service and the timetable over a given time period
3.12
validation

confirmation, through the provision of objective evidence, that the requirements for a specific intended use

or application have been fulfilled
Note 1 to entry: Verification is a prerequisite for validation.

[SOURCE: IEC 60050-192:2015, 192-01-18, modified – Notes 1 to 5 to entry have been removed and a

new Note 1 to entry has been added.]
3.13
verification

confirmation, through the provision of objective evidence, that specified requirements have been fulfilled

Note 1 to entry: Whilst the general term in this document is assessment, verification is commonly understood in the

assessment of models and data analysis and its use is more specific than the general term conformity.

[SOURCE: IEC 60050-192:2015, 192-01-17, modified – Notes 1 to 3 to entry have been removed and a

new Note 1 to entry has been added.]
---------------------- Page: 9 ----------------------
SIST EN 50641:2020
EN 50641:2020 (E)
4 Symbols and abbreviated terms

For the purposes of this document, the following symbols and abbreviated terms apply.

A coefficient of running resistance independent of speed
a knee point factor (see EN 50388:2012, 7.2)
AT autotransformer
ATPP autotransformer paralleling post including paralleling of CLS
B coefficient of running resistance for linear dependence of speed
C coefficient of running resistance for quadratic dependence of speed
CLS contact line system (overhead contact line or third rail)
cos φ power factor for the traction and auxiliary power
EMU electrical multiple unit
F tractive effort
F maximum tractive effort
FR freight train set
F running resistance
res
HS high speed train set

NOTE This name is used as a general term and does not relate to similar definitions given in

Directive (EU) 2016/797.
I current
I current for train set auxiliaries (e.g. air conditioning)
aux
I braking current of the train set
braking
I maximum current consumed by the train set at U
max n
Ind inductive behaviour
N/A not applicable
P auxiliary active power
aux
P maximum mechanical power
max
PP paralleling post where CLS of both tracks are electrically connected
R equivalent internal resistance of a substation
SP sectioning point of the CLS for each track.
SS substation including paralleling of CLS
SUB suburban train set
TSI technical specification of interoperability
U no load voltage at a substation for DC traction system
di0
U no load voltage at a substation for AC traction system
U short circuit voltage of a transformer
UIC60 rail profile with a mass of 60 kg/m
U highest permanent voltage (see EN 50163:2004)
max1
Umax2 highest non-permanent voltage (see EN 50163:2004)
U mean useful voltage (see EN 50388:2012, 8.2)
mean useful
U lowest non-permanent voltage (see EN 50163:2004)
min2
---------------------- Page: 10 ----------------------
SIST EN 50641:2020
EN 50641:2020 (E)
U nominal voltage for a given electrical supply system
U current collector voltage
V speed in km/h

v transfer speed 1 (transfer from adhesion characteristic to maximum voltage characteristic of

drive)

v transfer speed 2 (transfer from maximum voltage characteristic to torque limitation

characteristic of drive)
v maximum speed
v maximum allowed speed (track, train set)
max
Z transformer impedance
traction/braking efficiency
µ relative permeability
5 General

This document considers the acceptance of typical impedance based models of electric traction power

supply systems at fundamental frequency or DC. Both lumped and multiconductor impedance models are

covered, but this document does not consider complex models of active components such as a static

frequency converter.

The theoretical study of the interactions between the operation of rolling stock and the power supply system

by means of computer simulation is generally used to obtain detailed information about a traction power

system. This minimizes the costs of live tests, and as a consequence optimizes the investment to be made

for a given performance of the electrical railway system.

Depending on the type of the supply system (for example: AC or DC system), the simulation tools require

different data and different system descriptions. Therefore the scope of the simulation should be defined in

advance, taking account of possible supply systems (see Figure 1). The assessment process of the

simulation is in two parts. Firstly, a validation process is undertaken which compares in a qualitative way

specific characteristics of the key simulation output graphs, in order to validate the performance of the

simulation at critical events. Secondly, the quantitative verification of the simulation is assessed by

comparing key calculated values with those given in this document. The verification process laid out in this

document is based on a verification using a defined benchmark example of an electric traction power supply

system, and employing a common set of input data incorporating the infrastructure (including station

locations, gradient, speed limit), types of train sets and timetable.

NOTE The output data sets have been developed through assessment with several existing simulation tools,

currently used in electric traction power supply system design, and which therefore represent a range of differences

within core algorithms. The simulation accuracy of the outputs from these tools were compared, and tolerances applied

to cover the range of variation considered reasonable across all tools. The observed variation in these tools has no

effect on their applicability for use in TSI assessments, and hence this range of tolerance can be applied to the

acceptance of new tools. Annex C gives information on the calculation methodology of tolerances for determination of

applied boundary values.
The following cases are provided in the standard:
— DC 1,5 kV,
— DC 3 kV,
— AC 15 kV, lumped element,
— AC 25 kV, lumped element,
— AC 25 kV, multi-conductor model,
---------------------- Page: 11 ----------------------
SIST EN 50641:2020
EN 50641:2020 (E)
— AC 2x25 kV, multi-conductor model.

In order to obtain an acceptable verification of a simulation tool, the results of the simulation tool shall be

compared with the output results presented in this document according to the criteria described in

Annexes A and B.

In order to use a simulation tool with confidence, it shall be validated initially and after each revision of the

core functions of the software that have an impact on the simulation results. If the modification affects a

core function then a new validation is necessary. The validation shall be done by following the steps shown

in Figure 1.
Core functions of the simulation tools are the algorithms to:

— solve the differential equations of train sets movement resulting in power demand at current

collector(s);

— calculate the load flow (current-voltage) of the electrical network with changing configurations caused

by moving loads.

Interaction between mechanical and electrical core functions are required to provide an integrated solution,

where lack of electrical power will feedback to influence the train set movement including iterations as

necessary.

The core functionality comprises the algorithms of mechanical train movement, the electrical network load

flow, and the interaction between mechanical and electrical core functions required to provide an integrated

solution.

Changes to these core functions, and also functions outside the core such as interaction with the user,

presentation and pre-processing of data and models before passing to the core, and all post-processing of

data from the core, do not require full validation by an assessor. If a validated simulation tool has been

certified, the organization holding the certificate may asses such changes, subject to the requirements for

internal software quality management to provide a traceable audit process to these changes.

---------------------- Page: 12 ----------------------
SIST EN 50641:2020
EN 50641:2020 (E)
Figure 1 — Steps of validation
---------------------- Page: 13 ----------------------
SIST EN 50641:2020
EN 50641:2020 (E)
6 Test and models description
6.1 General

Common parameters for both AC and DC systems are given in 6.2 and 6.3. Parameters specific to DC and

AC systems are given respectively in 6.4 and 6.5.

The test case configurations and data are used for the purpose of the standard only. They do not represent

typical applications for system design.
6.2 Common parameters

The test case describes simple traffic along a given open air double track straight line. Although there are

some differences due to the different supply systems, some parameters remain identical among the test

cases, in particular:
— traffic timetable;
— train set.
The maximum track operational speed is 200 km/h for all train types.

The general description of the case is described in Figure 2. Distances are indicated in Tables 2 and 3 for

DC cases and Tables 6 and 7 for AC cases.
Station Station
Station Station Station
Station
Track 2
Track 1
A B C D E F
Train set
Station
Railway station position
Figure 2 — Test case general description
Three different kinds of train set are defined throughout the test case:
a) high speed train set;
b) suburban train set;
c) freight train set.
---------------------- Page: 14 ----------------------
SIST EN 50641:2020
EN 50641:2020 (E)
6.3 Train set descriptions
6.3.1 Type of train set and mechanical characteristics

The mechanical characteristics for the three different kinds of train set of this test case are provided as

follows:
a) high speed train set (HS): locomotive and coaches;
b) suburban train set (SUB): EMU;
c) freight train set (FR): locomotive and wagons.
The parameters shall be as specified in Table 1.
Table 1 — Train set mechanical and traction characteristics
SUB
Type Unit HS FR
(2 units)
Speed v km/h 110 50 80
Speed v km/h 180 140 140
Speed v km/h 220 160 160
Maximum allowed train set speed km/h 220 160 100
Maximum Tractive effort F kN 250 320 250
Tractive effort at v kN 152,8 114,3 143
Tractive effort at v kN 102 87,5 109,4
Total mass t 580 400 1 580
Rotating mass t 58 40 158
Efficiency (η) - 85 % 85 % 85 %
Power factor at the pantograph (traction /
- 0,96 ind. 0,96 ind. 0,96 ind.
braking and auxiliaries)
Auxiliary active power P MW 0,5 0,4 0
aux
A kN 9,23 3,351 6 24,3
B kN/(km/h) 0,015 8 0,008 208 0,084 7
C kN/(km/h) 0,001 23 0,000 66 0,004 03
Locomotive(s) - 1 2 (EMU) 1
Coaches/wagon - 10 - 25
Max permissible deceleration m/s 0,8 1 0,5
Applicable only to the AC cases; for DC cases the power factor is 1.

For the locomotives for the HS and FR train sets, the individual parameters shall be:

— mass : 80 t;

The running resistance shall be defined using a formula: F = A + B x v + C x v with v the speed in km/h.

res
The A, B and C coefficients apply to the whole train set.
Additionally, it shall be understood that:
---------------------- Page: 15 ----------------------
SIST EN 50641:2020
EN 50641:2020 (E)

— the tractive effort for the SUB train set is provided for the whole train set, thus the two units combined

have a total tractive effort of 320 kN;

— the adhesion factor and the acceleration are not provided as the tractive effort is assumed to be

transferred to the track under all circumstances;

— for braking, it is assumed that it is possible to brake with the desired deceleration under all

circumstances;
— train set mass model is concentrated.
NOTE 1 If train mass model is distributed, then a length of 1 m can be used.
— current collection point is located at the front end of the train;

— the efficiency (η) refers to the whole traction chain from current collector to the wheels not taking into

account the auxiliary power;

— the efficiency (η) and the power factor are both applicable to the whole train set speed range;

— the tractive effort is dependent upon the line voltage caused by current limitation as defined in 6.3.3.

NOTE 2 Some data are given to provide more clarity, precise formulae are given in this document.

6.3.2 Traction and braking effort characteristics

The tractive effort of the train set used is described according to a standardized tractive effort (F) versus

speed (v) characteristic which will be defined according to a set of parameters. The model and the

parameters are described hereafter in Figure 3.

The curve for regenerative braking effort shall be the same as the tractive effort versus speed curve.

Train set traction force versus Time
300
v v v
1 2 3
250
200
150
100
F = 0 kN when v > v
0 50 100 150 200 250 300
v (km/h)
Figure 3 — Tract
...