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 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. This seventh edition cancels and replaces the sixth edition published in 2007. This edition includes the following significant technical changes with respect to the previous edition: - title modified; - scope extended to synchronous compensators; - rotor overcurrent requirements added; - impact of stator harmonics on rotor unbalanced load capability introduced; - synchronisation requirements added; - adjustments of temperatures or temperature rise revised for gas turbine applications; - requirements for auxiliaries updated.

Drehende elektrische Maschinen - Teil 3: Besondere Anforderungen an Synchrongeneratoren, angetrieben durch Dampfturbinen oder Gasturbinen, und an synchrone Phasenschieber

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

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

Status
Published
Technical Committee
Drafting Committee
Current Stage
6060 - Document made available
Due Date
20-Jan-2020

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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.

---------------------- Page: 1 ----------------------
SIST EN IEC 60034-3:2020
---------------------- Page: 2 ----------------------
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
---------------------- Page: 3 ----------------------
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
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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
---------------------- Page: 5 ----------------------
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
---------------------- Page: 7 ----------------------
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;
---------------------- Page: 11 ----------------------
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.
---------------------- Page: 12 ----------------------
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
---------------------- Page: 13 ----------------------
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
...

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