EN 62747:2014

SLOVENSKI STANDARD
01-november-2014
Terminologija za napetostne pretvornike (VSC) za visokonapetostne enosmerne
sisteme (IEC 62747:2014)
Terminology for voltage-sourced converters (VSC) for high-voltage direct current (HVDC)
systems
/
Terminologie relative aux convertisseurs de source de tension (VSC) des systèmes en
courant continu à haute tension (CCHT)
Ta slovenski standard je istoveten z: EN 62747:2014
ICS:
01.040.29 Elektrotehnika (Slovarji) Electrical engineering
(Vocabularies)
29.200 8VPHUQLNL3UHWYRUQLNL Rectifiers. Convertors.
6WDELOL]LUDQRHOHNWULþQR Stabilized power supply
QDSDMDQMH
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 62747
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2014
ICS 29.200; 29.240
English Version
Terminology for voltage-sourced converters (VSC) for high-
voltage direct current (HVDC) systems
(IEC 62747:2014)
Terminologie relative aux convertisseurs de source de Terminologie für Spannungszwischenkreis-Stromrichter
tension (VSC) des systèmes en courant continu à haute (VSC) für Hochspannungsgleichstrom(HGÜ)-Systeme
tension (CCHT) (IEC 62747:2014)
(CEI 62747:2014)
This European Standard was approved by CENELEC on 2014-08-21. 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, 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: Avenue Marnix 17, B-1000 Brussels
© 2014 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 62747:2014 E
Foreword
The text of document 22F/301/CDV, future edition 1 of IEC 62747, prepared by SC 22F "Power
electronics for electrical transmission and distribution systems", of IEC/TC 22 "Power electronic
systems and equipment" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN 62747:2014.
The following dates are fixed:
– latest date by which the document has to be implemented at (dop) 2015-05-21
national level by publication of an identical national
standard or by endorsement
– latest date by which the national standards conflicting with (dow) 2017-08-21
the 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 [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
Endorsement notice
The text of the International Standard IEC 62747:2014 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 60146-1-1 NOTE Harmonized as EN 60146-1-1.
IEC 60146-2 NOTE Harmonized as EN 60146-2.
IEC 60747 NOTE Harmonized in EN 60747 series.
IEC 60633 NOTE Harmonized as EN 60633.
IEC 62501 NOTE Harmonized as EN 62501.
1)
IEC 62751-1 NOTE Harmonized as EN 62751-1 .
1)
IEC 62751-2 NOTE Harmonized as EN 62751-2 .

1) To be published.
- 3 - EN 62747:2014
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is
available here: www.cenelec.eu.

Publication Year Title EN/HD Year
IEC 60027 series Letter symbols to be used in electrical EN 60027 series
technology
IEC 60617 -  Graphical symbols for diagrams - -

IEC 62747 ®
Edition 1.0 2014-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Terminology for voltage-sourced converters (VSC) for high-voltage direct

current (HVDC) systems
Terminologie relative aux convertisseurs de source de tension (VSC) des

systèmes en courant continu à haute tension (CCHT)

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX V
ICS 29.200; 29.240 ISBN 978-2-8322-1702-3

– 2 – IEC 62747:2014  IEC 2014
CONTENTS
FOREWORD . 3
1  Scope . 5
2  Normative references. 5
3  Symbols and abbreviations . 5
3.1  List of letter symbols . 5
3.2  List of subscripts . 6
3.3  List of abbreviations . 7
4  Graphical symbols . 8
5  General terms related to converter circuits . 9
6  VSC topologies . 10
7  Converter units and valves . 10
8  Converter operating conditions. 16
9  HVDC systems and substations . 20
10  HVDC substation equipment . 23
11  Modes of control . 26
12  Control systems . 27
Bibliography . . 30

Figure 1 – Converter symbol identifications . 7
Figure 2 – Graphical symbols . 8
Figure 3 – Voltage-sourced converter unit . 11
Figure 4 – Phase unit of the modular multi-level converter (MMC) in basic half-bridge,
two-level arrangement, with submodules . 13
Figure 5 – Phase unit of the cascaded two-level converter (CTL) in half-bridge form . 14
Figure 6 – Phasor diagram showing a.c. system voltage, converter a.c. voltage and
converter a.c. current . . 18
Figure 7 – Example of bipolar VSC transmission with earth return . 21
Figure 8 – VSC transmission with a symmetrical monopole illustrated with capacitive
earthing on the d.c. side . 22
Figure 9 – VSC transmission with an asymmetrical monopole with metallic return . 22
Figure 10 – VSC transmission with an asymmetrical monopole with earth return . 22
Figure 11 – Major components that may be found in a VSC substation . 25
Figure 12 – Hierarchical structure of an HVDC control system . 29

IEC 62747:2014  IEC 2014 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
TERMINOLOGY FOR VOLTAGE-SOURCED CONVERTERS (VSC)
FOR HIGH-VOLTAGE DIRECT CURRENT (HVDC) SYSTEMS

FOREWORD
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indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62747 has been prepared by subcommittee 22F: Power
electronics for electrical transmission and distribution systems, of IEC technical committee 22:
Power electronic systems and equipment.
The text of this standard is based on the following documents:
CDV Report on voting
22F/301/CDV 22F/317A/RVC
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

– 4 – IEC 62747:2014  IEC 2014
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
...