IEC 62747:2014/AMD1:2019

Amendment 1 - Terminology for voltage-sourced converters (VSC) for high-voltage direct current (HVDC) systems

Amendement 1 - Terminologie relative aux convertisseurs de source de tension (VSC) des systèmes en courant continu à haute tension (CCHT)

General Information

• Status: Published
• Publication Date: 23-Jan-2019
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.200 - Rectifiers. Convertors. Stabilized power supply
• ICS: 29.240.99 - Other equipment related to power transmission and distribution networks
• Technical Committee: SC 22F - Power electronics for electrical transmission and distribution systems
• Drafting Committee: MT 33 - TC 22/SC 22F/MT 33
• Current Stage: PPUB - Publication issued
• Start Date: 31-Jan-2019
• Completion Date: 24-Jan-2019

Relations

• Amends: IEC 62747:2014 - Terminology for voltage-sourced converters (VSC) for high-voltage direct current (HVDC) systems
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 62747 ®
Edition 1.0 2019-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
A MENDMENT 1
AM ENDEMENT 1
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)
IEC 62747:2014-07/AMD1:2019-01(en-fr)

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IEC 62747 ®
Edition 1.0 2019-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
A MENDMENT 1
AM ENDEMENT 1
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
INTERNATIONALE
ICS 29.200; 29.240.99 ISBN 978-2-8322-6426-3

– 2 – IEC 62747:2014/AMD1:2019
© IEC 2019
FOREWORD
This amendment 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 amendment is based on the following documents:
CDV Report on voting
22F/481/CDV 22F/489/RVC
Full information on the voting for the approval of this amendment can be found in the report
on voting indicated in the above table.
The committee has decided that the contents of this amendment and the base publication will
remain unchanged until the stability date indicated on the IEC website under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
_____________
2 Normative references
Add the following normative reference to the list:
IEC 60633, Terminology for high-voltage direct current (HVDC) transmission

3.1 List of letter symbols
Replace the existing first paragraph by the following new paragraph:
Essential terms and definitions necessary for the understanding of this standard are given
here; other terminology is as per relevant parts of IEC 60747, and as per IEC 60633 for
certain specialized types of equipment which are found mainly on line-commutated HVDC
schemes but may occasionally be included in VSC HVDC schemes.
Replace the existing letter symbols, and their definitions, "U ", "U ", "U " (including its note),
v ve c
"U " and "U " by the following new letter symbols and definitions:
ce valve
U line-to-line voltage on converter side of interface transformer, r.m.s. value including
c
harmonics
U line-to-earth voltage on converter side of interface transformer, r.m.s. value including
ce
harmonics
U voltage between terminals of a valve (any defined value)
vtt
© IEC 2019
Replace the existing letter symbols "I " and "I ", including their definitions, by the following
v valve
new letter symbols and definitions:
I current on converter side of interface transformer, r.m.s. value including harmonics
c
I current through a valve
ν
3.2 List of subscripts
Replace the existing subscripts "c", "v" and "valve", including their definitions, by the following
new subscripts and definitions:
c converter side of interface transformer
v through or across one valve
tt terminal to terminal
Figure 1 – Converter symbol identifications
Replace the existing Figure 1 by the following new figure:
Positive d.c. terminal
I I
v d
U
vtt
U U U
Le ce dpe
U
L
I
L I
c
U
dpp
U
c
Transformer Transformer
line side converter side
I
d
I
v
Negative d.c. terminal
IEC
3.3 List of abbreviations
Replace the existing abbreviation "NGBS" by "NBGS".

– 4 – IEC 62747:2014/AMD1:2019
© IEC 2019
5 General terms related to converter circuits
5.4
arm
converter arm
Replace the existing definition by the following new definition:
part of a converter connecting one a.c. phase terminal with one d.c. pole terminal

7 Converter units and valves
7.8
VSC valve
Replace the existing term and definition by the following new term and definition:
VSC switch type valve
a
...