SIST EN IEC 60034-3:2020
(Main)Rotating electrical machines - Part 3: Specific requirements for synchronous generators driven by steam turbines or combustion gas turbines and for synchronous compensators (IEC 60034-3:2020)
Rotating electrical machines - Part 3: Specific requirements for synchronous generators driven by steam turbines or combustion gas turbines and for synchronous compensators (IEC 60034-3:2020)
This part of IEC 60034 applies to large three-phase synchronous generators, having rated
outputs of 10 MVA and above driven by steam turbines or combustion gas turbines. Also
included are synchronous Mvar compensators of the same output range connected to a grid for
the purpose of exchanging reactive power.
This document supplements basic requirements for rotating machines given in IEC 60034-1.
Common requirements are specified together with specific requirements for air, hydrogen or
liquid cooled synchronous generators or compensators.
This document also gives the precautions to be taken when using hydrogen cooled generators
including:
• rotating exciters driven by synchronous generators;
• auxiliary equipment needed for operating the generators;
• parts of the building where hydrogen might accumulate.
These requirements also apply to a synchronous generator driven by both a steam turbine and
a combustion gas turbine as part of a single shaft combined cycle unit.
These requirements do not apply to synchronous generators driven by water (hydraulic)
turbines or wind turbines.
NOTE The precautions taken when using hydrogen are valid for all cases where hydrogen is used as a coolant.
Drehende elektrische Maschinen - Teil 3: Besondere Anforderungen an Synchrongeneratoren, angetrieben durch Dampfturbinen oder Gasturbinen, und an synchrone Phasenschieber (IEC 60034-3:2020)
Machines électriques tournantes - Partie 3: Exigences spécifiques pour les alternateurs synchrones entraînés par des turbines à vapeur ou par des turbines à gaz et pour les compensateurs synchrones (IEC 60034-3:2020)
l'IEC 60034-3:2020 s'applique aux alternateurs triphasés synchrones de grande taille, de puissance assignée supérieure ou égale à 10 MVA, entraînés par des turbines à vapeur ou par des turbines à gaz. Elle inclut également les compensateurs Mvar synchrones de même puissance connectés à un réseau, destinés à échanger de la puissance réactive. Le présent document constitue un complément aux exigences de base pour les machines tournantes données dans l'IEC 60034-1.
Cette septième édition annule et remplace la sixième édition parue en 2007. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- modification du titre;
- extension du domaine d'application aux compensateurs synchrones;
- ajout d'exigences concernant la surintensité du rotor;
- introduction de l'impact des harmoniques statoriques sur la performance de la charge déséquilibrée du rotor;
- ajout d'exigences concernant la synchronisation;
- révision des ajustements des températures ou des échauffements pour les installations de type turbines à gaz;
- mise à jour des exigences concernant les auxiliaires.
Električni rotacijski stroji - 3. del: Posebne zahteve za sinhronske generatorje, ki jih poganjajo parne ali plinske turbine, in za sinhronske kompenzatorje (IEC 60034-3:2020)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN IEC 60034-3:2020
01-november-2020
Nadomešča:
SIST EN 60034-3:2008
Električni rotacijski stroji - 3. del: Posebne zahteve za sinhronske generatorje, ki
jih poganjajo parne ali plinske turbine, in za sinhronske kompenzatorje (IEC 60034-
3:2020)
Rotating electrical machines - Part 3: Specific requirements for synchronous generators
driven by steam turbines or combustion gas turbines and for synchronous compensators
(IEC 60034-3:2020)
Drehende elektrische Maschinen - Teil 3: Besondere Anforderungen an
Synchrongeneratoren, angetrieben durch Dampfturbinen oder Gasturbinen, und an
synchrone Phasenschieber (IEC 60034-3:2020)
Machines électriques tournantes - Partie 3: Exigences spécifiques pour les alternateurs
synchrones entraînés par des turbines à vapeur ou par des turbines à gaz et pour les
compensateurs synchrones (IEC 60034-3:2020)
Ta slovenski standard je istoveten z: EN IEC 60034-3:2020
ICS:
27.040 Plinske in parne turbine. Gas and steam turbines.
Parni stroji Steam engines
29.160.20 Generatorji Generators
SIST EN IEC 60034-3:2020 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN IEC 60034-3:2020
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SIST EN IEC 60034-3:2020
EUROPEAN STANDARD EN IEC 60034-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2020
ICS 29.160.01 Supersedes EN 60034-3:2008 and all of its amendments
and corrigenda (if any)
English Version
Rotating electrical machines - Part 3: Specific requirements for
synchronous generators driven by steam turbines or combustion
gas turbines and for synchronous compensators
(IEC 60034-3:2020)
Machines électriques tournantes - Partie 3: Exigences Drehende elektrische Maschinen - Teil 3: Besondere
spécifiques pour les alternateurs synchrones entraînés par Anforderungen an Synchrongeneratoren, angetrieben durch
des turbines à vapeur ou par des turbines à gaz et pour les Dampfturbinen oder Gasturbinen, und an synchrone
compensateurs synchrones Phasenschieber
(IEC 60034-3:2020) (IEC 60034-3:2020)
This European Standard was approved by CENELEC on 2020-06-30. 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, 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: Rue de la Science 23, B-1040 Brussels
© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60034-3:2020 E
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SIST EN IEC 60034-3:2020
EN IEC 60034-3:2020 (E)
European foreword
The text of document 2/1987/FDIS, future edition 7 of IEC 60034-3, prepared by IEC/TC 2 "Rotating
machinery" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
EN IEC 60034-3:2020.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2021-03-30
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2023-06-30
document have to be withdrawn
This document supersedes EN 60034-3:2008 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Endorsement notice
The text of the International Standard IEC 60034-3:2020 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 60079-0 NOTE Harmonized as EN IEC 60079-0
2
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SIST EN IEC 60034-3:2020
EN IEC 60034-3:2020 (E)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1 Where 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 60034-1 2017 Rotating electrical machines - Part 1: Rating - -
and performance
IEC 60034-4-1 - Rotating electrical machines - Part 4-1: EN IEC 60034-4-1 -
Methods for determining electrically excited
synchronous machine quantities from tests
IEC 60045-1 - Steam turbines - Part 1: Specifications EN IEC 60045-1 -
IEC 60079 series Explosive atmospheres EN IEC 60079 series
IEC 60085 - Electrical insulation - Thermal evaluation and EN 60085 -
designation
3
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SIST EN IEC 60034-3:2020
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SIST EN IEC 60034-3:2020
IEC 60034-3
®
Edition 7.0 2020-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Rotating electrical machines –
Part 3: Specific requirements for synchronous generators driven by steam
turbines or combustion gas turbines and for synchronous compensators
Machines électriques tournantes –
Partie 3: Exigences spécifiques pour les alternateurs synchrones entraînés
par des turbines à vapeur ou par des turbines à gaz et pour les compensateurs
synchrones
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.160.01 ISBN 978-2-8322-8084-3
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 IEC 60034-3:2020
– 2 – IEC 60034-3:2020 © IEC 2020
CONTENTS
FOREWORD . 5
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 General . 8
4.1 General rules . 8
4.2 Rated conditions . 9
4.2.1 Generators . 9
4.2.2 Compensators . 9
4.3 Rated voltage . 9
4.4 Power factor . 9
4.5 Rated speed . 10
4.6 Ranges of voltage and frequency . 10
4.7 Direction of rotation . 11
4.8 Stator winding, output voltage . 11
4.9 Winding insulation . 11
4.9.1 Insulation systems, thermal class . 11
4.9.2 Withstand voltage tests. 11
4.10 Insulation against shaft current . 12
4.11 Overspeed test . 12
4.12 Critical speeds . 12
4.13 P-Q capability diagram . 12
4.14 Overcurrent requirements . 14
4.14.1 General . 14
4.14.2 Stator current . 14
4.14.3 Rotor field current . 14
4.15 Unbalanced currents and current harmonics capability . 15
4.15.1 Negative sequence current . 15
4.15.2 Current harmonics . 15
4.16 Sudden short circuit . 16
4.17 Synchronisation . 16
4.18 Short circuit ratio (SCR) . 17
4.19 Direct axis transient and subtransient reactances . 17
4.20 Tolerances on short circuit ratio and direct axis transient and subtransient
reactances . 17
4.21 Mechanical conditions for rotors . 17
4.21.1 Number of starts . 17
4.21.2 Turning gear operation . 18
4.22 Coolers . 18
5 Air-cooled generators or compensators . 18
5.1 General . 18
5.2 Cooling system . 18
5.3 Temperature of primary coolant . 19
5.3.1 General . 19
5.3.2 Temperature detectors . 19
6 Hydrogen-cooled or liquid-cooled generators or compensators . 19
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SIST EN IEC 60034-3:2020
IEC 60034-3:2020 © IEC 2020 – 3 –
6.1 General . 19
6.2 Hydrogen pressure and purity in the casing . 19
6.3 Machine housing and cover plates . 20
6.4 Stator winding terminals . 20
6.5 Temperature of primary coolants, temperatures and temperature rises . 20
6.6 Temperature detectors . 20
6.7 Auxiliary systems . 21
7 Generators for combustion gas turbines or combined cycle applications . 21
7.1 General . 21
7.2 Service conditions . 21
7.2.1 General . 21
7.2.2 Primary coolant temperature . 22
7.2.3 Number of starts . 22
7.2.4 Application of load . 22
7.3 Rated output . 22
7.4 Capabilities . 22
7.4.1 General . 22
7.4.2 Base capability . 22
7.4.3 Temperature rise and temperatures at base capability . 24
7.4.4 Peak capability . 24
7.5 Rating plate . 25
7.6 Temperature tests . 25
Annex A (normative) Precautions to be taken when using hydrogen- cooled
synchronous generators or compensators . 26
A.1 General . 26
A.2 Hydrogen purity . 26
A.3 Normal operating conditions. 26
A.4 Protective measures for sliprings and coupled exciters . 26
A.5 Auxiliary equipment . 27
A.5.1 General . 27
A.5.2 Degassing tanks . 27
A.5.3 Gas dryer . 27
A.5.4 Instrumentation, control devices . 27
A.5.5 Electrical connections . 27
A.5.6 Containment of hydrogen . 28
A.5.7 Accumulation of hydrogen-air mixture . 29
A.5.8 Vent pipes . 29
A.5.9 Adjacent area . 29
A.6 Operation of the generator and its auxiliary equipment. 29
A.6.1 Sources of ignition . 29
A.6.2 Hydrogen-air mixture . 29
A.6.3 Air or hydrogen displacement . 29
A.6.4 Seal oil supply and hydrogen pressure . 30
A.6.5 Gas tightness . 30
A.6.6 Water system . 31
A.7 Guidance for adequate ventilation . 31
Bibliography . 33
Figure 1 – Operation over ranges of voltage and frequency . 10
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SIST EN IEC 60034-3:2020
– 4 – IEC 60034-3:2020 © IEC 2020
Figure 2 – Typical P-Q capability diagram of a generator . 13
Figure 3 – Typical generator capability curves . 23
Figure A.1 – Example of a large hydrogen supply unit feeding one or more generators
(simplified diagram) . 32
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SIST EN IEC 60034-3:2020
IEC 60034-3:2020 © IEC 2020 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ROTATING ELECTRICAL MACHINES –
Part 3: Specific requirements for synchronous generators
driven by steam turbines or combustion gas turbines
and for synchronous compensators
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 60034-3 has been prepared by IEC technical committee 2: Rotating
machinery.
This seventh edition cancels and replaces the sixth edition published in 2007. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) title modified;
b) scope extended to synchronous compensators;
c) rotor overcurrent requirements added;
d) impact of stator harmonics on rotor unbalanced load capability introduced;
e) synchronisation requirements added;
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SIST EN IEC 60034-3:2020
– 6 – IEC 60034-3:2020 © IEC 2020
f) adjustments of temperatures or temperature rise revised for gas turbine applications;
g) requirements for auxiliaries updated.
The text of this standard is based on the following documents:
FDIS Report on voting
2/1987/FDIS 2/1993/RVD
Full information on the voting for the approval of this International Standard can be found in the
report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts of IEC 60034 series, published under the general title Rotating electrical
machines, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
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SIST EN IEC 60034-3:2020
IEC 60034-3:2020 © IEC 2020 – 7 –
ROTATING ELECTRICAL MACHINES –
Part 3: Specific requirements for synchronous generators
driven by steam turbines or combustion gas turbines
and for synchronous compensators
1 Scope
This part of IEC 60034 applies to large three-phase synchronous generators, having rated
outputs of 10 MVA and above driven by steam turbines or combustion gas turbines. Also
included are synchronous Mvar compensators of the same output range connected to a grid for
the purpose of exchanging reactive power.
This document supplements basic requirements for rotating machines given in IEC 60034-1.
Common requirements are specified together with specific requirements for air, hydrogen or
liquid cooled synchronous generators or compensators.
This document also gives the precautions to be taken when using hydrogen cooled generators
including:
• rotating exciters driven by synchronous generators;
• auxiliary equipment needed for operating the generators;
• parts of the building where hydrogen might accumulate.
These requirements also apply to a synchronous generator driven by both a steam turbine and
a combustion gas turbine as part of a single shaft combined cycle unit.
These requirements do not apply to synchronous generators driven by water (hydraulic)
turbines or wind turbines.
NOTE The precautions taken when using hydrogen are valid for all cases where hydrogen is used as a coolant.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60034-1:2017, Rotating electrical machines – Part 1: Rating and performance
IEC 60034-4-1, Rotating electrical machines – Part 4-1: Methods for determining electrically
excited synchronous machine quantities from tests
IEC 60045-1, Steam turbines – Part 1: Specifications
IEC 60079 (all parts), Explosive atmospheres
IEC 60085, Electrical insulation – Thermal evaluation and designation
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SIST EN IEC 60034-3:2020
– 8 – IEC 60034-3:2020 © IEC 2020
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60034-1 and the
following apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
grid
public electrical network or local (e.g. industrial) network, which is connected to the generator
or compensator either directly or through a transformer
3.2
synchronous generator
large synchronous machine driven by steam or gas turbines which converts mechanical energy
into electrical energy and supplies it to an electrical grid
Note 1 to entry: Generators can also provide reactive power to the grid. The driving unit itself or additional
equipment is used to start up the generating unit.
3.3
synchronous compensator
large synchronous machine electrically coupled to the grid but not exchanging mechanical
energy through the shaft during steady state operation
Note 1 to entry: Reactive power is supplied to the grid or imported to the compensator by means of adjusting the
field current.
Note 2 to entry: The losses are covered by the grid. A compensator needs a start-up device, which accelerates the
unit to operating speed or can be started asynchronously if design is appropriate.
Note 3 to entry: Synchronous compensators are commonly named synchronous condensers.
3.4
mechanical start
change in speed from zero or turning gear speed to rated speed
3.5
turning gear operation
rotation at low speed to avoid undesirable bending of turbine- and/or generator/compensator-
rotors due to uneven circumferential temperature distribution
4 General
4.1 General rules
Turbine driven synchronous generators and synchronous compensators shall fulfil the basic
requirements for rotating machines specified in IEC 60034-1 unless otherwise specified in this
document.
Wherever there is reference to an agreement in this document, it shall be understood as an
agreement between manufacturer and purchaser.
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SIST EN IEC 60034-3:2020
IEC 60034-3:2020 © IEC 2020 – 9 –
4.2 Rated conditions
4.2.1 Generators
The rated conditions of a generator are given by the rated values of:
• the apparent power;
• frequency;
• voltage;
• power factor;
• primary coolant temperature (40°C unless otherwise agreed upon);
• field current and field voltage (see also 4.2.2);
and where applicable:
• site altitude;
• hydrogen pressure with indication whether the figure is to be interpreted as absolute or
gauge pressure;
• range of hydrogen purity, see IEC 60034-1.
4.2.2 Compensators
The rated conditions of
...
SLOVENSKI STANDARD
oSIST prEN 60034-3:2018
01-september-2018
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Rotating electrical machines - Part 3: Specific requirements for synchronous generators
driven by steam turbines or combustion gas turbines and for synchronous compensators
Ta slovenski standard je istoveten z: prEN 60034-3:2018
ICS:
27.040 Plinske in parne turbine. Gas and steam turbines.
Parni stroji Steam engines
29.160.20 Generatorji Generators
oSIST prEN 60034-3:2018 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 60034-3:2018
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oSIST prEN 60034-3:2018
2/1913/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60034-3 ED7
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2018-06-29 2018-09-21
SUPERSEDES DOCUMENTS:
2/1862/CD, 2/1891A/CC
IEC TC 2 : ROTATING MACHINERY
SECRETARIAT: SECRETARY:
United Kingdom Mr Charles Whitlock
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:
Other TC/SCs are requested to indicate their interest, if any, in
this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft for
Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.
TITLE:
Rotating electrical machines - Part 3: Specific requirements for synchronous generators driven by steam
turbines or combustion gas turbines and for synchronous compensators
PROPOSED STABILITY DATE: 2021
NOTE FROM TC/SC OFFICERS:
Copyright © 2018 International Electrotechnical Commission, IEC. All rights reserved. It is permitted to download this
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
permission in writing from IEC.
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oSIST prEN 60034-3:2018
IEC CDV 60034-3 © IEC 2018 1
CONTENTS
CONTENTS . 1
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
3.1 Grid . 7
3.2 Synchronous Generator . 7
3.3 Synchronous Compensator. 7
3.4 Mechanical start . 7
3.5 Turning gear operation . 7
4 General . 7
4.1 General rules . 7
4.2 Rated conditions . 7
4.2.1 Generators . 7
4.2.2 Compensators . 7
4.3 Rated voltage . 8
4.4 Power factor . 8
4.5 Rated speed . 8
4.6 Ranges of voltage and frequency . 8
4.7 Direction of rotation . 9
4.8 Stator winding, output voltage . 9
4.9 Winding insulation . 10
4.9.1 Insulation systems, thermal class . 10
4.9.2 Withstand voltage tests . 10
4.10 Insulation against shaft current . 10
4.11 Overspeed test . 10
4.12 Critical speeds . 10
4.13 P-Q capability diagram . 10
4.14 Overcurrent requirements . 12
4.14.1 Stator current . 12
4.14.2 Rotor field current . 12
4.15 Unbalanced currents and current harmonics capability . 12
4.15.1 Negative sequence current . 12
4.15.2 Current harmonics . 12
4.16 Sudden short circuit . 13
4.17 Synchronisation . 14
4.18 Short-circuit ratio . 14
4.19 Direct axis transient and subtransient reactances . 14
4.20 Tolerances on short-circuit ratio and direct axis transient and subtransient
reactances . 15
4.21 Mechanical conditions for rotors . 15
4.21.1 Number of starts . 15
4.21.2 Turning gear operation . 15
4.22 Coolers . 15
5 Air-cooled generators or compensators . 15
5.1 General . 15
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oSIST prEN 60034-3:2018
2 IEC CDV 60034-3 IEC 2018
5.2 Cooling system . 16
5.3 Temperature of primary coolant . 16
5.3.1 Temperature detectors . 16
6 Hydrogen-cooled or liquid-cooled generators or compensators . 16
6.1 General . 16
6.2 Hydrogen pressure and purity in the casing . 16
6.3 Housing and cover plates . 16
6.4 Stator winding terminals . 17
6.5 Temperature of primary coolants, temperatures and temperature rises . 17
6.6 Temperature detectors . 17
6.7 Auxiliary system . 17
7 Generators for combustion gas turbines or combined cycle applications . 18
7.1 General . 18
7.2 Service conditions . 18
7.2.1 General . 18
7.2.2 Primary coolant temperature . 18
7.2.3 Number of starts . 18
7.2.4 Application of load . 18
7.3 Rated output . 18
7.4 Capabilities . 19
7.4.1 General . 19
7.4.2 Base capability . 19
7.4.3 Temperature rise and temperatures at base capability . 20
7.4.3.1 Indirectly cooled windings . 20
7.4.3.2 Windings directly cooled by air or hydrogen . 20
7.4.3.3 Fluid cooled windings . 21
7.4.4 Peak capability . 21
7.5 Rating plate . 21
7.6 Temperature tests . 21
A.1 General . 22
A.2 Hydrogen purity . 22
A.3 Normal operating conditions . 22
A.4 Protective measures for sliprings and coupled exciters . 22
A.5 Auxiliary equipment . 23
A.5.1 General . 23
A.5.2 Degassing tanks . 23
A.5.3 Gas dryer . 23
A.5.4 Instrumentation, Control Devices . 23
A.5.5 Electrical Connections . 23
A.5.6 Containment of hydrogen . 24
A.5.7 Accumulation of hydrogen-air mixture . 24
A.5.8 Vent pipes . 25
A.5.9 Adjacent area . 25
A.6 Operation of the generator and its auxiliary equipment . 25
A.6.1 Sources of ignition. 25
A.6.2 Hydrogen-air mixture . 25
A.6.3 Air or hydrogen displacement . 25
A.6.4 Seal oil supply and hydrogen pressure . 26
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A.6.5 Gas tightness . 26
A.6.6 Water system . 26
A.7 Guidance for adequate ventilation . 26
Figure 1 – Operation over ranges of voltage and frequency .9
Figure 2 – Typical P-Q capability diagram . 11
Figure 3 – Typical generator capability curves . 20
Figure A.1 – Example of a large hydrogen supply unit feeding one or more generators
(simplified diagram) . 28
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4 IEC CDV 60034-3 © IEC 2018
1 INTERNATIONAL ELECTROTECHNICAL COMMISSION
2 ____________
3
4 ROTATING ELECTRICAL MACHINES
5
6 Part 3: Specific requirements for synchronous generators
7 driven by steam turbines or combustion gas turbines
8 and for synchronous compensators
9
10 FOREWORD
11 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
12 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
13 international co-operation on all questions concerning standardization in the electrical and electronic fields. To
14 this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
15 Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
16 Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
17 in the subject dealt with may participate in this preparatory work. International, governmental and non-
18 governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
19 with the International Organization for Standardization (ISO) in accordance with conditions determined by
20 agreement between the two organizations.
21 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
22 consensus of opinion on the relevant subjects since each technical committee has representation from all
23 interested IEC National Committees.
24 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
25 Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
26 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
27 misinterpretation by any end user.
28 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
29 transparently to the maximum extent possible in their national and regional publications. Any divergence
30 between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
31 the latter.
32 5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
33 equipment declared to be in conformity with an IEC Publication.
34 6) All users should ensure that they have the latest edition of this publication.
35 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
36 members of its technical committees and IEC National Committees for any personal injury, property damage or
37 other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
38 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
39 Publications.
40 8) Attention is drawn to the normative references cited in this publication. Use of the referenced publications is
41 indispensable for the correct application of this publication.
42 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
43 patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
44 International Standard IEC 60034-3 has been prepared by IEC Technical Committee 2:
45 Rotating machinery.
46 This seventh edition cancels and replaces the sixth edition published in 2007. This edition
47 constitutes a technical revision. The significant technical changes with respect to the previous
48 edition are as follows:
49 - Scope extended to synchronous compensators
50 - Rotor overcurrent requirements added
51 - Impact of stator harmonics on rotor unbalanced load capability introduced
52 - Synchronisation requirements added
53 - Adjustments of temperatures or temperature rise revised for gas turbine applications
54 - Requirements for auxiliaries updated
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55 The text of this standard is based on the following documents:
FDIS Report on voting
2/XXXX/FDIS 2XXXX/RVD
56
57 Full information on the voting for the approval of this standard can be found in the report on
58 voting indicated in the above table.
59 This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
60 A list of all parts of IEC 60034 series, published under the general title Rotating electrical machines,
61 can be found on the IEC website.
62 The committee has decided that the contents of this publication will remain unchanged until
63 the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in
64 the data related to the specific publication. At this date, the publication will be
65 • reconfirmed,
66 • withdrawn,
67 • replaced by a revised edition, or
68 • amended.
69
70
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71 ROTATING ELECTRICAL MACHINES
72
73 Part 3: Specific requirements for synchronous generators
74 driven by steam turbines or combustion gas turbines
75 and for synchronous compensators
76
77
78 1 Scope
79 This part of IEC 60034 applies to large three-phase synchronous generators, having rated
80 outputs of 10 MVA and above driven by steam turbines or combustion gas turbines. Also
81 included are synchronous MVAr compensators of the same output range connected to a grid
82 for the purpose of exchanging reactive power.
83 This standard supplements basic requirements for rotating machines given in IEC 60034-1.
84 Common requirements are prescribed together with specific requirements for air, hydrogen or
85 liquid cooled synchronous generators or compensators.
86 This part of IEC 60034 also gives the precautions to be taken when using hydrogen cooled
87 generators including:
88 – rotating exciters driven by synchronous generators;
89 – auxiliary equipment needed for operating the generators;
90 – parts of the building where hydrogen might accumulate.
91 NOTE 1 These requirements also apply to a synchronous generator driven by both a steam turbine and a
92 combustion gas turbine as part of a single shaft combined cycle unit.
93 NOTE 2 These requirements do not apply to synchronous generators driven by water (hydraulic) turbines or wind
94 turbines.
95 NOTE 3 The precautions to be taken when using hydrogen are valid for all cases where hydrogen is used as a
96 coolant.
97 2 Normative references
98 The following referenced documents are indispensable for the application of this document.
99 For dated references, only the edition cited applies. For undated references, the latest edition
100 of the referenced document (including any amendments) applies.
101 IEC 60034-1, Rotating electrical machines – Part 1: Rating and performance
102 IEC 60034-4, Rotating electrical machines – Part 4: Methods for determining synchronous
103 machine quantities from tests
104 IEC 60034-18, Rotating electrical machines - Part 18-1: Functional evaluation of insulation
105 systems - General guidelines. Depending on the insulation system used and the winding
106 design, additional parts of IEC 60034-18 are applicable.
107 IEC 60045-1, Steam turbines – Part 1: Specifications
108 IEC 60079 (all parts), Electrical apparatus for explosive gas atmospheres
109 IEC 60085, Electrical insulation - Thermal evaluation and designation
110 3 Terms and definitions
111 For the purposes of this document, the terms and definitions in IEC 60034-1 together with the
112 following additions apply.
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113 3.1 Grid
114 In this standard ‘grid’ is used for a public electrical network or a local (e.g. industrial) network,
115 which is connected to the generator or compensator either directly or through a transformer.
116 3.2 Synchronous Generator
117 Generators covered by this standard are large synchronous machines driven by steam or gas
118 turbines. They convert mechanical energy into electrical energy and supply it to an electrical
119 grid. Generators can also provide reactive power to the grid. The driving unit itself or
120 additional equipment is used to start up the generating unit.
121 3.3 Synchronous Compensator
122 A synchronous compensator is a large synchronous machine electrically coupled to the grid
123 but not exchanging mechanical energy through the shaft during steady state operation.
124 Reactive power is supplied to the grid or imported to the compensator by means of adjusting
125 the field current. The losses are covered by the grid. A compensator needs a start-up device,
126 which accelerates the unit to operating speed.
127 3.4 Mechanical start
128 Change in speed from zero or turning gear speed to rated speed.
129 3.5 Turning gear operation
130 Rotation at low speed to avoid undesirable bending of turbine- and/or generator/compensator-
131 rotors due to uneven circumferential temperature distribution.
132 4 General
133 4.1 General rules
134 Turbine driven synchronous generators and synchronous compensators shall fulfil the basic
135 requirements for rotating machines specified in IEC 60034-1 unless otherwise specified in this
136 standard.
137 Wherever there is reference to an agreement in this standard, it shall be understood as an
138 agreement between manufacturer and purchaser.
139 4.2 Rated conditions
140 4.2.1 Generators
141 The rated conditions of a generator are given by the rated values of
142 – the apparent power;
143 – frequency;
144 – voltage;
145 – power factor;
146 – primary coolant temperature (40°C unless otherwise agreed upon);
147 – field current and field voltage (see also NOTE below);
148 and where applicable
149 – site altitude;
150 – hydrogen pressure with indication whether the figure is to be interpreted as absolute or
151 gauge pressure;
152 – range of hydrogen purity, see IEC 60034-1.
153 4.2.2 Compensators
154 The rated conditions of a compensator are basically the same as those of a generator but with
155 different definitions of apparent power and power factor.
156 – The rated apparent power consists mainly of the maximum reactive output at rated voltage
157 when the machine is overexcited, and of a small amount of active power delivered to the
158 compensator.
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159 - The rated power factor is close to zero, reflecting mainly the maximum reactive power and
160 the losses compensated by the grid.
161 For compensators, the range of reactive power shall be agreed upon.
162 NOTE During operation, the field current of a generator or compensator is adjusted depending on the demand of
163 reactive power. Generator/compensator rated field current and field voltage are those values needed to operate the
164 generator/compensator at rated conditions. Generator/compensator modelling studies may require base values for
165 field current and field voltage other than rated.
166 4.3 Rated voltage
167 The rated voltage shall be agreed upon.
168 4.4 Power factor
169 The power factor of a generator shall be agreed upon. Standardised rated power factors at
170 the generator terminals are 0,8, 0,85 and 0,9 overexcited.
171 NOTE 1 The lower the rated power factor the larger the generator will be.
172 NOTE 2 The rated power factor should reflect the demand on reactive power overexcited at rated active power
173 output including some margin.
174 NOTE 3 It is recommended that the generator is capable of providing a power factor of 0,95 underexcited at rated
175 active power output.
176 The power factor of a synchronous compensator deviates from zero only by an amount, which
177 depends on the losses compensated by the grid.
178 4.5 Rated speed
179 Synchronous generators or compensators are typically connected to a grid with a fundamental
180 operating frequency of 50Hz or 60Hz.
181 The rated speed is
–1
182 3 000/p min for 50 Hz generators or compensators;
–1
183 3 600/p min for 60 Hz generators or compensators;
184 where p is the number of pole pairs.
185 4.6 Ranges of voltage and frequency
186 Synchronous generators and compensators shall be capable of continuous rated output at the
187 rated power factor over the ranges of ±5 % in voltage and ±2 % in frequency, as defined by
188 the shaded area of Figure 1.
189 The temperature rise limits in Tables 8 and 9, or the temperature limits in Table 13 of
190 IEC 60034-1:2017 shall apply at the rated voltage and frequency.
191 Potentially required operation outside the dashed borderline of Fig. 1 shall be the subject of
192 an agreement.
193 NOTE 1 If the operating point deviates from the rated values of voltage and frequency, the temperature rise or
194 total temperatures change and may progressively increase. Continuous operation at rated output at certain parts of
195 the boundary of the shaded area may cause additional temperature rise of up to approximately 10 K. Generators or
196 compensators will also carry output at rated power factor within the ranges of ±5 % in voltage and -5%.+3% in
197 frequency, as defined by the outer boundary of Figure 1, but temperature rises will be further increased. As
198 IEC 60034-1 applies to rated conditions, operation outside the shaded area should be limited in extent, duration
199 and frequency of occurrence in order to minimize the reduction of lifetime due to thermal effects, The output should
200 be reduced or other corrective measures taken as soon as practicable.
201
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V %
105
103
f %
95 98 100 102 103
98
97
95
IEC 082/05
202
203 Figure 1 – Operation over ranges of voltage and frequency
204 NOTE 2 Overvoltage together with low frequency, or low voltage with over-frequency, are considered to be
205 unlikely operating conditions. The former condition most likely increases the temperature rise
...
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