IEC TR 62543:2011/AMD2:2017

IEC TR 62543 ®
Edition 1.0 2017-05
TECHNICAL
REPORT
colour
inside
AMENDMENT 2
High-voltage direct current (HVDC) power transmission using voltage sourced
converters (VSC)
IEC TR 62543:2013-07/AMD2:2017-05(en)

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IEC TR 62543 ®
Edition 1.0 2017-05
TECHNICAL
REPORT
colour
inside
AMENDMENT 2
High-voltage direct current (HVDC) power transmission using voltage sourced

converters (VSC)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.200; 29.240.99 ISBN 978-2-8322-4350-3

– 2 – IEC TR 62543:2011/AMD2:2017

 IEC 2017
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:

DTR Report on voting
22F/440/DTR 22F/450/RVDTR
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• withdrawn,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.
IMPORTANT – The “colour inside” logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this publication using a colour printer.

A bilingual version of this publication may be issued at a later date.
_____________
2 Normative references
Replace the existing reference "IEC 60633, Terminology for high-voltage direct-current
(HVDC) transmission" by the following new reference: "IEC 62747, Terminology for voltage-
sourced converters (VSC) for high-voltage direct current (HVDC) systems".
Add the following new references:
IEC 62501, Voltage sourced converter (VSC) valves for high-voltage direct current (HVDC)
power transmission – Electrical testing
IEC 62751 (all parts), Power losses in voltage sourced converter (VSC) valves for high
voltage direct current (HVDC) systems

 IEC 2017
3 Terms and definitions
Replace the existing sentence by the following new sentence:

For the purposes of this document, the terms and definitions given in IEC 62747, IEC 62501

and the following apply.
3.1 General
Insert the following text just after the title of 3.1:

Basic terms and definitions for voltage sourced converters used for HVDC transmission are
given in IEC 62747. Terminology on electrical testing of VSC valves for HVDC transmission is
given in IEC 62501.
Delete the first paragraph of the note. Change the second paragraph of the note into normal
paragraph text.
Figure 1 – Major components that may be found in a VSC substation
Replace the existing figure and its footnotes modified by IEC TR 62543:2011/AMD1:2013 by
the following new figure and footnotes:

IEC
3)
1 circuit breaker 9 VSC unit
4)
2 pre-Insertion Resistor 10 VSC d.c. capacitor

1) 1)
3 line side harmonic filter 11 d.c. harmonic filter
6) 7)
4 line side high frequency filter 12 dynamic braking system
5)
5 interface transformer 13 neutral point grounding branch
1) 8)
6 converter side harmonic filter 14 d.c. reactor
2)
7 + 8 converter side high frequency filter 15 d.c. cable or overhead transmission line
2)
8 phase reactor
– 4 – IEC TR 62543:2011/AMD2:2017

 IEC 2017
1)
In some designs of VSC based on "controllable voltage source" valves, the harmonic filters may not be

required.
2)
In some designs of VSC, the phase reactor may fulfill part of the function of the converter-side high frequency

filter.
3)
In some VSC topologies, each valve of the VSC unit may include a "valve reactor", which may be built into the

valve or provided as a separate component.
4)
In some designs of VSC, the VSC d.c. capacitor may be partly or entirely distributed amongst the three phase
units of the VSC Unit, where it is referred to as the d.c. submodule capacitors.

5)
The philosophy and location of the neutral point grounding branch may be different depending on the design of
the VSC unit.
6)
In some designs of VSC, the interface transformer may fulfill part of the function of the line-side high frequency
filter.
7)
Optional.
8)
Optional, if phase reactors are located on the d.c. side of the converter.
3.3 Power semiconductor terms
Delete the existing sub-clause, modified by IEC TR 62543:2011/AMD1:2013, including its title.
3.4 VSC topologies
Delete the existing sub-clause, modified by IEC TR 62543:2011/AMD1:2013, including its title.
3.5 VSC transmission
Delete items 3.5.1 to 3.5.3, 3.5.5, 3.5.7 and 3.5.9 modified by
IEC TR 62543:2011/AMD1:2013.
3.6 Operating states
Delete the existing sub-clause, modified by IEC TR 62543:2011/AMD1:2013, including its title.
3.10 Insulation co-ordination terms
Delete the existing sub-clause, including its title.
4.1.2.1 General
Replace, in the last paragraph, the first sentence by the following new sentence:
The active and reactive power are related to the AC voltages U and U of the AC system
L conv
and converter respectively, the reactance X between these voltages and the phase angle δ

between them, according to the following:
U ×U × sinδ
L conv
P=
X
U × (U −U × cosδ
L L conv
Q=
X
Move the second and third sentences of the last paragraph on a new line to become a fourth
paragraph.
4.1.3 Operating principles of a VSC transmission scheme
Add, at the beginning of the first sentence of the last paragraph, the words "For example,".

 IEC 2017
4.1.4 Applications of VSC transmission

Add, at the beginning of the first sentence of the third bullet point of the subclause, the words

"In most cases,".
Figure 7 – VSC transmission with an asymmetrical monopole with metallic return

Replace the existing figure by the following new figure:

IEC
Figure 8 – VSC transmission with an asymmetrical monopole with earth return
Replace the existing figure by the following new figure:
IEC
Figure 9 – VSC transmission in bipolar configuration
Replace the existing figure by the following new figure:

IEC
Figure 10 – Parallel connection of two converter units
Replace the existing figure by the following new figure:

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