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BS EN IEC 60034-3:2020

$167.15

Rotating electrical machines – Specific requirements for synchronous generators driven by steam turbines or combustion gas turbines and for synchronous compensators

Published By Publication Date Number of Pages
BSI 2020 40
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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.

PDF Catalog

PDF Pages PDF Title
2 undefined
5 Annex ZA(normative)Normative references to international publicationswith their corresponding European publications
7 English
CONTENTS
10 FOREWORD
12 1 Scope
2 Normative references
13 3 Terms and definitions
4 General
4.1 General rules
14 4.2 Rated conditions
4.2.1 Generators
4.2.2 Compensators
4.3 Rated voltage
4.4 Power factor
15 4.5 Rated speed
4.6 Ranges of voltage and frequency
Figure 1 – Operation over ranges of voltage and frequency
16 4.7 Direction of rotation
4.8 Stator winding, output voltage
4.9 Winding insulation
4.9.1 Insulation systems, thermal class
4.9.2 Withstand voltage tests
17 4.10 Insulation against shaft current
4.11 Overspeed test
4.12 Critical speeds
4.13 P-Q capability diagram
18 Figure 2 – Typical P-Q capability diagram of a generator
19 4.14 Overcurrent requirements
4.14.1 General
4.14.2 Stator current
4.14.3 Rotor field current
20 4.15 Unbalanced currents and current harmonics capability
4.15.1 Negative sequence current
4.15.2 Current harmonics
21 4.16 Sudden short circuit
4.17 Synchronisation
22 4.18 Short circuit ratio (SCR)
4.19 Direct axis transient and subtransient reactances
4.20 Tolerances on short circuit ratio and direct axis transient and subtransient reactances
4.21 Mechanical conditions for rotors
4.21.1 Number of starts
23 4.21.2 Turning gear operation
4.22 Coolers
5 Air-cooled generators or compensators
5.1 General
5.2 Cooling system
24 5.3 Temperature of primary coolant
5.3.1 General
5.3.2 Temperature detectors
6 Hydrogen-cooled or liquid-cooled generators or compensators
6.1 General
6.2 Hydrogen pressure and purity in the casing
25 6.3 Machine housing and cover plates
6.4 Stator winding terminals
6.5 Temperature of primary coolants, temperatures and temperature rises
6.6 Temperature detectors
26 6.7 Auxiliary systems
7 Generators for combustion gas turbines or combined cycle applications
7.1 General
7.2 Service conditions
7.2.1 General
27 7.2.2 Primary coolant temperature
7.2.3 Number of starts
7.2.4 Application of load
7.3 Rated output
7.4 Capabilities
7.4.1 General
7.4.2 Base capability
28 Figure 3 – Typical generator capability curves
29 7.4.3 Temperature rise and temperatures at base capability
7.4.4 Peak capability
30 7.5 Rating plate
7.6 Temperature tests
31 Annex A (normative) Precautions to be taken when using hydrogen-cooled synchronous generators or compensators
A.1 General
A.2 Hydrogen purity
A.3 Normal operating conditions
A.4 Protective measures for sliprings and coupled exciters
32 A.5 Auxiliary equipment
A.5.1 General
A.5.2 Degassing tanks
A.5.3 Gas dryer
A.5.4 Instrumentation, control devices
A.5.5 Electrical connections
33 A.5.6 Containment of hydrogen
34 A.5.7 Accumulation of hydrogen-air mixture
A.5.8 Vent pipes
A.5.9 Adjacent area
A.6 Operation of the generator and its auxiliary equipment
A.6.1 Sources of ignition
A.6.2 Hydrogen-air mixture
A.6.3 Air or hydrogen displacement
35 A.6.4 Seal oil supply and hydrogen pressure
A.6.5 Gas tightness
36 A.6.6 Water system
A.7 Guidance for adequate ventilation
37 Figure A.1 – Example of a large hydrogen supply unit feeding one or more generators (simplified diagram)
38 Bibliography
BS EN IEC 60034-3:2020
$167.15