SIST EN 50388-2:2025
(Main)Fixed installations and rolling stock for railway applications - Technical criteria for the coordination between electric traction power supply systems and rolling stock to achieve interoperability - Part 2: Stability and harmonics
Fixed installations and rolling stock for railway applications - Technical criteria for the coordination between electric traction power supply systems and rolling stock to achieve interoperability - Part 2: Stability and harmonics
This document establishes the acceptance criteria according to EN 50388-1:2022, 10.2 for compatibility between traction units and power supply for known phenomena and known technologies. That is in relation to:
- co-ordination between controlled elements and also between these elements and resonances in the electrical infrastructure in order to achieve network system stability;
- co-ordination of harmonic behaviour with respect to excitation of electrical resonances.
The following electric traction systems are within the scope:
- railways;
- guided mass transport systems that are integrated with railways;
- material transport systems that are integrated with railways.
Public three-phase networks are out of the scope, but networks which are dedicated to railways are included.
This document is applied in accordance with the requirements in EN 50388-1:2022, Clause 10. It does not apply retrospectively to rolling stock or railway power supply elements already in service.
It is the aim of this Part 2 to support acceptance of new elements (rolling stock or infrastructure) by specifying precise requirements and methods for demonstration of compliance. This document acts as “code of practice” quoted in EN 50388-1:2022, 10.2. However, it is still admissible to use the process as defined in EN 50388-1:2022, 10.3 instead.
This version of the standard only applies to AC systems. Later versions might include similar effects in DC networks in addition, see Annex D.
The main phenomena identified and treated in this document are:
- electrical resonance stability;
- low frequency stability;
- overvoltages caused by harmonics.
The interaction with signalling (including track circuits) is not dealt with in this document.
Bahnanwendungen - Ortsfeste Anlagen und Bahnfahrzeuge - Technische Kriterien für die Koordination zwischen Anlagen der Bahnenergieversorgung und Fahrzeugen zum Erreichen der Interoperabilität - Teil 2: Stabilität und Oberschwingungen
Installations Fixes et Matériel Roulant pour les Applications ferroviaires - Critères techniques pour la coordination entre les installations fixes de traction électrique et le matériel roulant pour réaliser l’interopérabilité
Le présent document établit les critères d'acceptation conformes à l'EN 50388-1:2022, 10.2, qui assurent la compatibilité entre les unités motrices et l'alimentation, pour les phénomènes et les technologies connus. Cela concerne :
- la coordination entre les éléments commandés ainsi qu'entre ces éléments et les résonances de l'infrastructure électrique, afin d'assurer la stabilité du système dans le réseau ;
- la coordination du comportement vis-à-vis des harmoniques par rapport à l'excitation des résonances électriques.
Les systèmes de traction électrique suivants relèvent du domaine d'application du présent document :
- les réseaux ferroviaires ;
- les réseaux de transport en commun guidés intégrés aux réseaux ferroviaires ;
- les réseaux de transport de matériaux intégrés aux réseaux ferroviaires.
Les réseaux électriques publics triphasés ne relèvent pas du domaine d'application du présent document, mais les réseaux électriques dédiés aux réseaux ferroviaires sont couverts.
Le présent document s'applique conformément aux exigences de l'EN 50388-1:2022, Article 10. Il ne s'applique pas rétroactivement aux matériels roulants ni aux composants du système d'alimentation électrique du réseau ferroviaire déjà en service.
La présente Partie 2 traite de l'acceptation des nouveaux éléments (matériel roulant ou infrastructure) et spécifie notamment les exigences et méthodes de démonstration de la conformité. Le présent document constitue le « code de pratique » mentionné dans l'EN 50388-1:2022, 10.2. Toutefois, l'utilisation du processus défini dans l'EN 50388-1:2022, 10.3 demeure toujours admise.
La présente version de la norme s'applique uniquement aux systèmes à courant alternatif. Des versions ultérieures pourraient inclure, en plus, des effets analogues dans les réseaux à courant continu (voir l'Annexe D).
Les principaux phénomènes identifiés et traités dans le présent document sont les suivants :
- la stabilité de résonance électrique ;
- la stabilité à basse fréquence ;
- les surtensions dues aux harmoniques.
Les interactions avec la signalisation (y compris les circuits de voie) ne sont pas traitées dans le présent document.
Fiksni postroji in vozna sredstva za železniške naprave - Tehnični kriteriji za uskladitev med napajalnimi viri in voznimi sredstvi za doseganje interoperabilnosti - 2. del: Stabilnost in harmoniki
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-maj-2025
Fiksni postroji in vozna sredstva za železniške naprave - Tehnični kriteriji za
uskladitev med napajalnimi viri in voznimi sredstvi za doseganje interoperabilnosti
- 2. del: Stabilnost in harmoniki
Fixed installations and rolling stock for railway applications - Technical criteria for the
coordination between electric traction power supply systems and rolling stock to achieve
interoperability - Part 2: Stability and harmonics
Bahnanwendungen - Ortsfeste Anlagen und Bahnfahrzeuge - Technische Kriterien für
die Koordination zwischen Anlagen der Bahnenergieversorgung und Fahrzeugen zum
Erreichen der Interoperabilität - Teil 2: Stabilität und Oberschwingungen
Installations Fixes et Matériel Roulant pour les Applications ferroviaires - Critères
techniques pour la coordination entre les installations fixes de traction électrique et le
matériel roulant pour réaliser l’interopérabilité
Ta slovenski standard je istoveten z: EN 50388-2:2025
ICS:
29.280 Električna vlečna oprema Electric traction equipment
45.060.01 Železniška vozila na splošno Railway rolling stock in
general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN 50388-2
NORME EUROPÉENNE
EUROPÄISCHE NORM March 2025
ICS 45.060.01; 29.280
English Version
Fixed installations and rolling stock for railway applications -
Technical criteria for the coordination between electric traction
power supply systems and rolling stock to achieve
interoperability - Part 2: Stability and harmonics
Installations Fixes et Matériel Roulant pour les Applications Ortsfeste Anlagen und Bahnfahrzeuge für
ferroviaires - Critères techniques pour la coordination entre Bahnanwendungen - Technische Kriterien für die
les installations fixes de traction électrique et le matériel Koordinierung zwischen elektrischen
roulant pour réaliser l'interopérabilité - Partie 2 : Stabilité et Bahnenergieversorgungssystemen und Fahrzeugen zum
harmoniques Erreichen der Interoperabilität - Teil 2: Stabilität und
Oberschwingungen
This European Standard was approved by CENELEC on 2025-02-03. 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,
Türkiye 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
© 2025 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50388-2:2025 E
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 6
2 Normative references . 6
3 Terms, definitions, abbreviations and symbols . 7
3.1 Terms and definitions . 7
3.2 Abbreviations and symbols . 10
4 Requirements . 10
4.1 Electrical resonance stability . 10
4.2 Low-frequency stability . 13
4.2.1 Introduction . 13
4.2.2 General requirements . 13
4.2.3 Rolling stock . 15
4.2.4 Static converters . 15
4.2.5 Infrastructure. 16
4.3 Overvoltages caused by harmonics . 16
4.3.1 General . 16
4.3.2 Rolling stock . 16
4.3.3 Static converters . 20
4.3.4 Infrastructure. 21
4.4 Specific issues arising during lifetime of new element . 21
5 Tests and documentation . 22
5.1 Electrical resonance stability . 22
5.1.1 Rolling stock . 22
5.1.2 Infrastructure. 26
5.2 Low-frequency stability . 28
5.2.1 Rolling stock . 28
5.2.2 Static converters . 29
5.2.3 Infrastructure. 29
5.3 Overvoltages caused by harmonics . 29
5.3.1 Rolling stock . 29
5.3.2 Static converters . 30
5.3.3 Infrastructure. 31
Annex A (informative) Technical background . 33
Annex B (informative) Examples from experienced phenomena (measurements) . 42
Annex C (informative) Data related to the compatibility study of harmonics and dynamic effects . 46
Annex D (informative) Examples experienced in DC systems . 58
Annex ZZ (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive (EU) 2016/797 aimed to be covered . 60
Bibliography . 62
European foreword
This document (EN 50388-2:2025) has been prepared by CLC/SC 9XC, “Electric supply and earthing
systems for public transport equipment and auxiliary apparatus (Fixed installations)”, of CLC/TC 9X,
“Electrical and electronic applications for railways”.
It is also relevant to the scope and expertise of CLC/SC 9XB, “Electromechanical material on board of rolling
stock”.
The following dates are fixed:
• latest date by which this document has to be (dop) 2026-03-31
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) 2028-03-31
conflicting with this document have to be
withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
EN 50388 “Railway applications – Fixed installations and rolling stock - Technical criteria for the coordination
between traction power supply and rolling stock to achieve interoperability” consists of the following parts:
— Part 1: General
— Part 2: Stability and harmonics
This document has been prepared under a standardization request addressed to CENELEC by the
European Commission. The Standing Committee of the EFTA States subsequently approves these requests
for its Member States.
For the relationship with EU Legislation, see informative Annex ZZ, which is an integral part of this
document.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Introduction
This document is linked to EN 50388-1:2022, which describes the general technical criteria for the
coordination between power supply and rolling stock to achieve interoperability.
To improve readability, this document is structured as shown in Table 1, which only shows references to the
most important clauses and subclauses.
Table 1 — Structure of this document
Topic Requirements Tests and documentation
Clause Main requirements Clause Most important elements
Electrical 4.1 Definition of a limit frequency 5.1 For controlled elements, in most
resonance fL cases measurement of frequency
stability response of input admittance is
— Lowest electric traction
required.
power supply system
resonance frequency is > f . 5.1.1.2 Defines in which cases input
L
admittance has to be measured and
— All controlled elements
how it has to be measured.
are passive for all
frequencies > fL. 5.1.1.3 Defines the combined test.
Requirements for filter 5.1.1.4 Defines in which cases
capacitors. simulation is sufficient and specifies
the requirements for the simulator.
5.1.1.5 Defines in which cases
declaration of conformity is sufficient.
5.1.2 Defines the methods to be
used to assess the lowest resonant
frequency of the power supply.
A.1 Technical background about electrical resonance stability
B.1 Examples of real electrical resonance instability experiences
Low- 4.2 Demonstration of stable 5.2 Verification either by
frequency operation for predefined
— time domain simulation (or
stability operation scenarios of
measurements); or
electric traction power supply
— any other validated method.
system and one or several
identical traction units at one
location.
A.2 Technical background about low-frequency stability
A.2.1 Background and experiences.
A.2.2 Acceptance criteria and verification.
B.2 Examples of experienced low frequency power oscillations.
Overvoltages 4.3 4.3.2 Rolling stock 5.3 5.3.1 Demonstration of compliance
caused by for rolling stock by:
Defines the limit of the
harmonics
overvoltage and specifies the — Calculation of line current
calculation method by using spectrum including plausibility check
line current spectrum, by measurement.
bandpass filtering, — Calculation of harmonic voltage
summation methods and assessment using the method given
standardized power supply in 4.3.
impedances.
— Check of interlacing between
4.3.2.3 Overvoltage units.
detection. Suggests methods
— Check of overvoltage protection.
of overvoltage detection.
— If diode rectification is used to
4.3.3 Defines applicability
reduce risk of overvoltages check of
Topic Requirements Tests and documentation
Clause Main requirements Clause Most important elements
and the overvoltage limits for correct transition between pulsing
static converter stations. and blocking of line converter.
4.3.4 Infrastructure related 5.3.2 Demonstration of compliance
topics. for static converters by:
— Assessing the overvoltage by
combining the converter with a line of
variable length.
— defining the assessment method
in time domain.
— plausibility check of the
simulation model by measurement.
5.3.3 Demonstration of compliance
for infrastructure.
A.3 Tec
...
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