EN 60633:1999/A2:2015

SLOVENSKI STANDARD
01-december-2015
Terminologija za visokonapetostni enosmerni prenos (HVDC) - Dopolnilo A2
Terminology for high-voltage direct current (HVDC) transmission
Terminologie für Hochspannungsgleichstromübertragung (HGÜ)
Terminologie pour le transport d'énergie en courant continu à haute tension (CCHT)
Ta slovenski standard je istoveten z: EN 60633:1999/A2:2015
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 60633:1999/A2

NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2015
ICS 29.200
English Version
Terminology for high-voltage direct current (HVDC) transmission
(IEC 60633:1998/A2:2015)
Terminologie pour le transport d'énergie en courant continu Terminologie für Hochspannungsgleichstrom-Übertragung
à haute tension (CCHT) (HGÜ)
(IEC 60633:1998/A2:2015) (IEC 60633:1998/A2:2015)
This amendment A2 modifies the European Standard EN 60633:1999; it was approved by CENELEC on 2015-09-02. CENELEC members
are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this amendment 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 amendment 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
© 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 60633:1999/A2:2015 E

European foreword
The text of document 22F/340/CDV, future IEC 60633:1998/A2, 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 60633:1999/A2:2015.

The following dates are fixed:
• latest date by which the document has to be (dop) 2016-06-02
implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2018-09-02
• latest date by which the national
standards conflicting with 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 60633:1998/A2:2015 was approved by CENELEC as a
European Standard without any modification.
Replace Annex ZA of EN 60633:1999 as follows:
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 60050-551 -  International Electrotechnical Vocabulary - -
(IEV) -
Part 551: Power electronics
IEC 60146-1-1 -  Semiconductor converters - General EN 60146-1-1 -
requirements and line commutated
converters -
Part 1-1: Specification of basic
requirements
IEC 60617-5 -  Graphical symbols for diagrams - EN 60617-5 -
Part 5: Semiconductors and electron tubes
IEC 60617-6 -  Graphical symbols for diagrams - EN 60617-6 -
Part 6: Production and conversion of
electrical energy
IEC 60633 ®
Edition 2.0 2015-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
A MENDMENT 2
AM ENDEMENT 2
Terminology for high-voltage direct current (HVDC) transmission

Terminologie pour le transport d'énergie en courant continu à haute tension

(CCHT)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.200 ISBN 978-2-8322-2801-2

– 2 – IEC 60633:1998/AMD2:2015
© IEC 2015
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/340/CDV 22F/350A/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 web site 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.
___________
CONTENTS
Add the following new terms:
5.13  commutating voltage
5.14  controlled capacitor commutated converter
5.15  series capacitor converter

Replace the existing terms 6.12 and 6.18 as follows:
6.12  valve base electronics (VBE)
6.18  valve reactor
IEC 60633:1998/AMD2:2015 – 3 –
© IEC 2015
Add the following new terms:
6.21  valve module
6.22  redundant levels
6.23  valve anode terminal
6.24  valve cathode terminal
7.35  operating state
7.36  blocked state
7.37  valve voltage
Replace the existing terms 8.4 and 8.8 as follows:
8.4  bi-directional HVDC system
8.8  (asymmetric) monopolar (HVDC) system

Add the following new terms:
8.16  symmetrical monopole
8.17  rigid DC current bipolar system
8.18  symmetrical monopolar (HVDC) system
8.19  earth return
8.20  metallic return
8.21  series converter configuration
8.22  unitary connection
8.23  isolated generating system
8.24  point of common coupling (PCC)
8.25  point of common coupling – DC side (PCC-DC)

Replace the existing terms 9.1, 9.2 and 9.4 as follows:
9.1  AC (harmonic) filter
9.2  (DC) smoothing reactor
9.4  DC harmonic filter
Add the following new terms:
9.14  AC high frequency (HF) filter
9.15  DC high frequency (HF) filter
9.16  neutral bus switch (NBS)
9.17  neutral bus grounding switch (NBGS)

– 4 – IEC 60633:1998/AMD2:2015
© IEC 2015
Replace the existing terms 10.2 and 10.4 as follows:
10.2  DC voltage control mode
10.4  active power control mode

Add the following new terms:
10.8  AC voltage control mode
10.9  islanded network operation mode
10.10  SSTI damping control mode

Replace the existing term 11.8 as follows:
11.8  valve control unit (VCU)

Add the following new term:
11.9  integrated AC/DC system control

2 Normative references
Replace the first paragraph with the following new text.
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.
Replace all existing dated references with undated references.
3.1 List of letter symbols
Replace, in line 2, the word "conventional" with the word "nominal" to read:
U   nominal no-load direct voltage
d0
3.3 List of abbreviations
Add the following abbreviation:
SSTI   sub-synchronous torsional interaction (see 10.10)
5 General terms related to converter circuits
5.4
(converter) arm
Replace the existing definition and note with the following new definition:
part of a bridge connecting two points of different potentials within a bridge, for example,
between an AC terminal and a DC terminal

IEC 60633:1998/AMD2:2015 – 5 –
© IEC 2015
Add, at the end of Clause 5 as modified by Amendment 1, the following new terms and
definitions:
5.13
commutating voltage
voltage which causes the current to commutate
[SOURCE: IEC 60500-551:1998, 551-16-02]
5.14
controlled capacitor commutated converter
converter in which controlled series capacitors are included between the converter
transformer and the valves
5.15
series capacitor converter
converter in which fixed series capacitors are inserted between the AC filter bus and the AC
network
6 Converter units and valves
6.1
converter (unit)
Replace the existing definition and note with the following new definition.
indivisible operative unit comprising all equipment between the point of common coupling on
the AC side (see 8.24) and the point of common coupling DC side (see 8.25), essentially one
or more converter bridges, together with one or more converter transformers, converter unit
control equipment, essential protective and switching devices and auxiliaries, if any, used for
conversion (see Figure 3)
6.3
valve
Delete the note.
6.6
thyristor module
Replace the existing definition and notes as follows:
part of a valve comprising a mechanical assembly of thyristors with their immediate auxiliaries
but without valve reactors
Note 1 to entry: Thyristor modules may be elements in the construction of a valve, and/or be interchangeable for
maintenance purposes.
6.9
(valve) thyristor level
Replace, in the existing definition, the words "comprised of" by the word "comprising".
6.10
valve support
Replace the existing definition with the following new definition and note:
that part of the valve which mechanically supports and electrically insulates the active part of
the valve from earth
Note 1 to entry: A part of a valve which is clearly identifiable in a discrete form to be a valve support may not
exist in all designs of valves.

– 6 – IEC 60633:1998/AMD2:2015
© IEC 2015
6.11
valve structure
Replace the existing definition with the following new definition:
structural components of a valve, required in order to physically support the valve modules
6.12
valve interface (electronics) (unit)
Replace the existing term, definition and note as follows:
valve base electronics
VBE
electronic unit, at earth potential, providing the electrical to optical conversion between the
converter control system and the valves
Note 1 to entry: This note applies to the French language only.
6.13
valve electronics
Replace the existing definition with the following new definition:
electronic circuits at valve potential(s) which perform control and protection functions for one
or more valve levels
6.18
valve (anode) (cathode) reactor
Replace the existing term and definition as follows:
valve reactor
reactor(s) connected in series with the thyristors in a valve for the purpose of limiting the rate
of rise of current at turn-on and voltage during the off-state
Note 1 to entry: Valve reactors may be external to the entire valve or distributed within the valve.

Add, after 6.20, the following new terms and their definitions:
6.21
valve module
part of a valve comprising a mechanical assembly of thyristors with their immediate auxiliaries
and valve reactor(s)
6.22
redundant levels
maximum number of series connected thyristor levels in a valve that may be short-circuited
externally or internally during service without affecting the safe operation of the valve as
demonstrated by type tests, and which if and when exceeded, would require shutdown of the
valve to replace the failed levels or acceptance of increased risk of failures
6.23
valve anode terminal
valve terminal at which the forward current flows into the valve
6.24
valve cathode terminal
valve terminal at which the forward current flows out of the valve

IEC 60633:1998/AMD2:2015 – 7 –
© IEC 2015
7 Converter operating conditions
7.11
non-conducting state; blocking state
Replace the existing definition with the following new definition:
condition of a valve when all thyristors are turned off
7.16
converter deblocking
Delete from the definiti
...