SIST EN 60700-2:2017

SLOVENSKI STANDARD
SIST EN 60700-2:2017
01-januar-2017
7LULVWRUVNLYHQWLOLHOHNWURQNH]DYLVRNRQDSHWRVWQLHQRVPHUQLSUHQRV+9'&
HOHNWULþQHHQHUJLMHGHO7HUPLQRORJLMD,(&
Thyristor valves for high voltage direct current (HVDC) power transmission - Part 2:
Terminology (IEC 60700-2:2016)
Valves à thyristors pour le transport d'énergie en courant continu à haute tension
(CCHT) - Partie 2: Terminologie (IEC 60700-2:2016)
Ta slovenski standard je istoveten z: EN 60700-2:2016
ICS:
29.200 8VPHUQLNL3UHWYRUQLNL Rectifiers. Convertors.
6WDELOL]LUDQRHOHNWULþQR Stabilized power supply
QDSDMDQMH
31.080.20 Tiristorji Thyristors
SIST EN 60700-2:2017 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 60700-2:2017

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SIST EN 60700-2:2017


EUROPEAN STANDARD EN 60700-2

NORME EUROPÉENNE

EUROPÄISCHE NORM
November 2016
ICS 29.200

English Version
Thyristor valves for high voltage direct current (HVDC) power
transmission - Part 2: Terminology
(IEC 60700-2:2016)
Valves à thyristors pour le transport d'énergie en courant Thyristorventile für Hochspannungsgleichstrom-
continu à haute tension (CCHT) - Partie 2: Terminologie Energieübertragung (HGÜ) - Teil 2: Terminologie
(IEC 60700-2:2016) (IEC 60700-2:2016)
This European Standard was approved by CENELEC on 2016-07-22. 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
© 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN 60700-2:2016 E

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SIST EN 60700-2:2017
EN 60700-2:2016
European foreword
The text of document 22F/373/CDV, future edition 1 of IEC 60700-2, 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 60700-2:2016.

The following dates are fixed:
• latest date by which the document has to be (dop) 2017-05-25
implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2019-11-25
• 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 60700-2:2016 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 60700-1 NOTE Harmonized as EN 60700-1.
2

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SIST EN 60700-2:2017
EN 60700-2:2016
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 - -
technology
IEC 60633 -  Terminology for high-voltage direct current EN 60633 -
(HVDC) transmission

3

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SIST EN 60700-2:2017

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SIST EN 60700-2:2017



IEC 60700-2

®


Edition 1.0 2016-06




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE











Thyristor valves for high voltage direct current (HVDC) power transmission –

Part 2: Terminology




Valves à thyristors pour le transport d’énergie en courant continu à haute

tension (CCHT) –

Partie 2: Terminologie















INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 29.200 ISBN 978-2-8322-3474-7



Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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SIST EN 60700-2:2017
– 2 – IEC 60700-2:2016 © IEC 2016
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references. 5
3 Symbols and abbreviations . 5
3.1 General . 5
3.2 List of letter symbols . 5
3.3 List of abbreviations . 5
4 General terms related to converter circuits . 6
5 Converter performance . 6
6 Thyristor valve design . 6
7 Thyristor valve performance . 11
8 Thyristor valve voltages, currents and other parameters . 12
9 Thyristor valve control . 15
10 Thyristor valve protection . 16
Bibliography . 22

Figure 1 – Example of a converter unit . 17
Figure 2 – Commutation process at rectifier and inverter modes of operation . 18
Figure 3 – Illustrations of commutation in inverter operation . 19
Figure 4 – Typical valve voltage waveforms . 20
Figure 5 – An example of thyristor valve composition . 21

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SIST EN 60700-2:2017
IEC 60700-2:2016 © IEC 2016 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

THYRISTOR VALVES FOR HIGH VOLTAGE
DIRECT CURRENT (HVDC) POWER TRANSMISSION –

Part 2: Terminology

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
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 60700-2 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/373/CDV 22F/395A/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.

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SIST EN 60700-2:2017
– 4 – IEC 60700-2:2016 © IEC 2016
A list of all parts in the IEC 60700 series, published under the general title Thyristor valves for
high voltage direct current (HVDC) power transmission, can be found on the IEC website.
The committee has decided that the contents of this 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.

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SIST EN 60700-2:2017
IEC 60700-2:2016 © IEC 2016 – 5 –
THYRISTOR VALVES FOR HIGH VOLTAGE
DIRECT CURRENT (HVDC) POWER TRANSMISSION –

Part 2: Terminology



1 Scope
This part of IEC 60700 defines terms for thyristor valves for high-voltage direct current (HVDC)
power transmission with line commutated converters most commonly based on three-phase
bridge connections for the conversion from AC to DC and vice versa.
2 Normative references
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.
IEC 60027(all parts), Letter symbols to be used in electrical technology
IEC 60633, Terminology for high-voltage direct current (HVDC) transmission
3 Symbols and abbreviations
3.1 General
The lists in 3.2 and 3.3 cover only the most frequently used symbols. The lists of symbols of
the IEC 60027 series and IEC 60633 apply.
3.2 List of letter symbols
α (trigger/firing) delay angle
β (trigger/firing) advance angle
µ commutation overlap angle
γ extinction angle
3.3 List of abbreviations
The following abbreviations are always in capital letters and without dots:
ETT electrically triggered thyristor
LTT light triggered thyristor
TCU thyristor control unit
HVDC high-voltage direct current
VBE valve base electronics
MVU multiple valve (unit)
BOD breakover diode

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SIST EN 60700-2:2017
– 6 – IEC 60700-2:2016 © IEC 2016
4 General terms related to converter circuits
4.1
converter arm
part of a bridge connecting two points of different potentials within a bridge, for example
between an AC terminal and a DC terminal
Note 1 to entry: The main function of a converter arm is conversion.
4.2
converter bridge
equipment used to implement the bridge converter connection, if used
SEE: Figure 1
Note 1 to entry: The term "bridge" may be used to describe either the circuit connection or the equipment
implementing that circuit.
[SOURCE: IEC 60633: 2015, 6.2, modified – The expression "and the by-pass arm" has been
deleted from the definition.]
4.3
converter unit
indivisible operative unit comprising all equipment between the point of common coupling on
the AC side and the point of common coupling on the DC side, 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 1
Note 1 to entry: If a converter unit comprises two converter bridges with a phase displacement of 30 degrees,
then the converter unit forms a 12-pulse unit.
5 Converter performance
5.1
forward direction
conducting direction
direction of current through a valve, when current flows from the anode terminal to the
cathode terminal
5.2
reverse direction
non-conducting direction
direction of current through a valve, when current flows from the cathode terminal to the
anode terminal
6 Thyristor valve design
6.1
thyristor
bi-stable semiconductor device comprising three or more junctions which can be switched
from the off-state to the on-state
Note 1 to entry: Devices having only three layers but having switching characteristics similar to those of four-
layers devices may also be called thyristors.
Note 2 to entry: The term "thyristor" is used as a generic term to cover the whole range of PNPN type devices. It
may be used by itself for any member of the thyristor family when such use does not result in ambiguity or

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SIST EN 60700-2:2017
IEC 60700-2:2016 © IEC 2016 – 7 –
misunderstanding. In particular, the term "thyristor" is widely used for reverse blocking triode thyristor, formerly
called "silicon controlled rectifier”.
Note 3 to entry: Thyristors may either be electrically triggered thyristor (ETT） or light triggered thyristor (LTT).
6.2
electrically triggered thyristor
ETT
thyristor triggered by applying electrical pulses to the thyristor gate
Note 1 to entry: This note applies to the French language only.
6.3
light triggered thyristor
LTT
thyristor triggered by applying light pulses to a photosensitive area within the thyristor gate
area
Note 1 to entry: This note applies to the French language only.
6.4
damping circuit
snubber circuit
circuit (usually consisting of a series connected resistor and capacitor) connected in parallel
to a thyristor to reduce the amplitude of the extinction overshoot voltage
6.4.1
damping capacitor
snubber capacitor
capacitor connected in parallel to a thyristor (usually in series with a resistor) to reduce the
amplitude of the extinction overshoot voltage
6.4.2
damping resistor
snubber resistor
resistor connected in parallel to a thyristor (in series with a capacitor) to limit the amplitude of
discharge current of the snubber capacitor after thyristor turn-on
6.5
DC grading resistor
resistor connected in parallel to the thyristor to equalize DC voltage unbalance caused by
tolerances of thyristor blocking currents
Note 1 to entry: In some designs, DC grading resistor also acts as high voltage arm of the voltage divider for
monitoring voltage across the thyristor level.
6.6
heat sink
separable cooling element, usually through which a heat transfer agent flows, that contributes
to the dissipation of the heat produced within the thyristors and other components, if any, in
the valve
6.7
thyristor control unit
TCU
electronic unit at thyristor level potential used to trigger, protect and monitor the thyristor
Note 1 to entry: Some other terms are used for this unit: thyristor electronics (TE), thyristor firing and monitoring
unit (TFM) or ( thyristor) gating unit.
Note 2 to entry: In some designs, a thyristor voltage monitoring unit (TVM) is used which performs monitoring functions only.

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SIST EN 60700-2:2017
– 8 – IEC 60700-2:2016 © IEC 2016
Note 3 to entry: This note applies to the French language only.
6.8
thyristor stack
thyristor clamped assembly
mechanical arrangement of more than one thyristor, stacked in an alternating series with heat
sinks and clamped within an insulating mechanical support unit
Note 1 to entry: The clamping force is usually exerted by a disk spring arrangement.
6.9
single valve unit
single structure
...