EN 62751-1:2014

SLOVENSKI STANDARD
01-december-2014
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Determination of power losses in voltage sourced converter (VSC) valves for high-
voltage direct current (HVDC) systems - Part 1: General requirements
Bestimmung der Leistungsverluste in Spannungszwischenkreis-Stromrichtern (VSC) für
Hochspannungsgleichstrom(HGÜ)-Systeme -- Teil 1: Allgemeine Anforderungen
Détermination des pertes de puissance dans les valves à convertisseur de source de
tension (VSC) des systèmes de transport d’énergie en courant continu à haute tension
(CCHT) -- Partie 1: Exigences générales
Ta slovenski standard je istoveten z: EN 62751-1:2014
ICS:
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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 62751-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2014
ICS 29.200; 29.240
English Version
Power losses in voltage sourced converter (VSC) valves for
high-voltage direct current (HVDC) systems - Part 1: General
requirements
(IEC 62751-1:2014)
Pertes de puissance dans les valves à convertisseur de Bestimmung der Leistungsverluste in
source de tension (VSC) des systèmes en courant continu Spannungszwischenkreis-Stromrichtern (VSC) für
à haute tension (CCHT) - Partie 1: Exigences générales Hochspannungsgleichstrom(HGÜ)-Systeme - Teil 1:
(CEI 62751-1:2014) Allgemeine Anforderungen
(IEC 62751-1:2014)
This European Standard was approved by CENELEC on 2014-10-01. 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 62751-1:2014 E
Foreword
The text of document 22F/302/CDV, future edition 1 of IEC 62751-1, 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 62751-1:2014.
The following dates are fixed:
– latest date by which the document has to be implemented at (dop) 2015-07-01
national level by publication of an identical national
standard or by endorsement
– latest date by which the national standards conflicting with (dow) 2017-10-01
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 62751-1:2014 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
IEC 61803:1999 NOTE Harmonised as EN 61803:1999.

- 3 - EN 62751-1:2014
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 60633 -  Terminology for high-voltage direct current EN 60633 -
(HVDC) transmission
IEC 60747-2 -  Semiconductor devices - Discrete devices - -
and integrated circuits -- Part 2: Rectifier
diodes
IEC 60747-9 2007 Semiconductor devices - Discrete devices - - -
Part 9: Insulated-gate bipolar transistors
(IGBTs)
IEC 62747 2014 Terminology for voltage-sourced EN 62747 2014
converters (VSC) for high-voltage direct
current (HVDC) systems
IEC 62751-1 ®
Edition 1.0 2014-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Power losses in voltage sourced converter (VSC) valves for high-voltage direct

current (HVDC) systems –
Part 1: General requirements
Pertes de puissance dans les valves à convertisseur de source de tension (VSC)

des systèmes en courant continu à haute tension (CCHT) –

Partie 1: Exigences générales
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX V
ICS 29.200; 29.240 ISBN 978-2-8322-1835-8

– 2 – IEC 62751-1:2014 © IEC 2014
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
3.1 Converter types . 7
3.2 Semiconductor devices . 7
3.3 Converter operating states . 8
3.4 Device characteristics . 9
3.5 Other definitions . 9
4 General conditions. 10
4.1 General . 10
4.2 Causes of power losses . 11
4.3 Categories of valve losses . 11
4.4 Operating conditions . 12
4.4.1 General . 12
4.4.2 Reference ambient conditions . 12
4.4.3 Reference a.c. system conditions . 12
4.4.4 Converter operating states. 12
4.4.5 Treatment of redundancy . 12
4.5 Use of real measured data . 13
4.5.1 General . 13
4.5.2 Routine testing . 13
4.5.3 Characterisation testing . 13
5 Conduction losses . 14
5.1 General . 14
5.2 IGBT conduction losses . 16
5.3 Diode conduction losses . 16
5.4 Other conduction losses . 17
6 D.C. voltage-dependent losses . 17
7 Losses in d.c. capacitors . 18
8 Switching losses . 18
8.1 General . 18
8.2 IGBT switching losses . 19
8.3 Diode switching losses . 20
9 Other losses . 21
9.1 Snubber circuit losses . 21
9.2 Valve electronics power consumption. 21
10 Total valve losses per converter substation . 22
Annex A (informative) Determination of power losses in other HVDC substation
equipment . 25
A.1 General . 25
A.2 Guidance for calculating losses in each equipment . 25
A.2.1 Circuit breaker . 25
A.2.2 Pre-insertion resistor . 25
A.2.3 Line side harmonic filter . 26

IEC 62751-1:2014 © IEC 2014 – 3 –
A.2.4 Line side high frequency filter . 26
A.2.5 Interface transformer . 26
A.2.6 Converter side harmonic filter . 27
A.2.7 Converter side high frequency filter . 27
A.2.8 Phase reactor . 27
A.2.9 VSC unit . 27
A.2.10 VSC d.c. capacitor . 27
A.2.11 D.C. harmonic filter . 27
A.2.12 Dynamic braking system . 27
A.2.13 Neutral point grounding branch . 28
A.2.14 D.C. reactor . 28
A.2.15 Common mode blocking reactor . 28
A.2.16 D.C. side high frequency filter . 28
A.2.17 D.C. cable or overhead transmission line . 28
A.3 Auxiliaries and station service losses . 29
Bibliography . 30

Figure 1 – On-state voltage of an IGBT or diode .
...