1 Scope
This standard specifies the general requirements for cylindrical rotor synchronous machine and respectively specifies the special requirements for the air cooled or liquid cooled synchronous machines driven by combustion gas turbine.
This standard also specifies the matters needing attention for the hydrogen-cooled generator, including the rotating exciter driven by synchronous generator, the auxiliary equipments required for the generator operation and the areas in the plant building where hydrogen gas may be accumulated.
This standard applies to three-phase cylindrical rotor synchronous generators, having capacity above 10MVA (or MW). It supplements GB 755.Matters not specified in this standard all shall comply with those specified in GB 755. This standard includes neither the motors continuously supplied by inverters nor the imported generators.
This standard is the important reference for the users and the manufacturer signing technical agreement. The special requirements for specific products, if any, may be decided by the supplier and the purchaser.
2 Normative References
The following normative documents contain provisions which, through reference in this standard, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding correction contents), any of these publications do not apply. Parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. For undated references, the latest edition of the normative document is applicable to these specifications.
Contents
Foreword III
1 Scope
2 Normative References
3 Terms and Definitions
3.1 Mechanical start
3.2 Turning gear operation
4 General
4.1 General Rules
4.2 Rated Conditions
4.3 Rated Voltage
4.4 Power Factor
4.5 Rated Speed
4.6 Ranges of Voltage and Frequency During the Operation Period
4.8 Stator Winding
4.9 Rated Field Voltage and Current
4.10 Generator Insulation
4.11 Prevention of Shaft Current
4.12 Over-speed Test
4.13 Critical Speeds
4.14 P-Q Capability Diagram
4.15 Overcurrent of Stator
4.16 Sudden Shortcircuit
4.17 Short-circuit Ratio
4.18 Direct Axis Transient Reactance (X'd) and Subtransient Reactance (X"d) for Generators
4.19 Tolerances on Short-circuit Ratio and Direct Axis Transient and Subtransient Reactances
4.20 Mechanical Conditions for Rotors
4.21 Coolers
4.22 Unbalanced Load
4.23 Noise
4.24 Requirements for Exciters
4.25 Short time voltage rising test
4.26 Vibration Limit
4.27 Irregular Total Harmonic Distortion (THD) of Voltage Waveform
4.28 Allowable Deviation for Three-phase DC Resistance of Stator Windings
4.29 Overcurrent Limits of Rotor
4.30 Limits for Oil Outlet Temperature of Shaft Bearing and Temperature of Bearing Bush
4.31 Monitoring
4.32 Magnetic Loss Operation
4.33 Test Items and Acceptance Regulations
4.34 Nameplate and Production Number
4.35 Casing, Transportation and Storage
4.36 Supply Scope of Complete Set
4.37 Spare Products and Parts
4.38 Accompanied Erection Diagrams and Technical Documents
4.39 Guarantee Period
4.40 Reliability
5 Air-cooled Generators
5.1 General
5.2 Specifications and Series
5.3 Aeration-cooling Mode of Generators
5.4 Service Conditions
5.5 Limits for Temperature Rise and Temperature of Each Part of Generator
6 Hydrogen-cooled or Liquid-cooled Generators
6.1 General
6.2 Specifications and Series
6.3 Service Conditions
6.4 Generator Housing and Cover Plates
6.5 Stator Winding Terminals
6.6 Limits for Temperature Rise and Temperature of Each Part of Generator
6.7 Airtightness Requirements for Hydrogen-cooled Generators
6.8 Inspection on Ventilation Duct of Directly Hydrogen-cooled Rotor
6.9 Inspection on Internal Water System of Winding
6.10 Water cut-off Operation
6.11 Auxiliary System
6.12 Test Items
6.13 Safety Measures for Hydrogen-cooled Cylindrical Rotor Synchronous Machines
6.14 Nameplate
7 Generators for Combustion Gas Turbines or Combined Cycle Applications
7.1 General
7.2 Service Conditions
7.3 Rated Output
7.4 Capabilities
7.5 Nameplate
7.6 Temperature Tests
Annex A (Informative) Supply Scope of Complete Set
Annex B (Informative) Spate Parts
Annex C (Informative) Accompanied Erection Diagrams and Technical Documents
Annex D (Normative) Safety Measures for Hydrogen-cooled Cylindrical Rotor Synchronous Machine
Annex E (Normative) Relevant Parts of GB 755 Quoted in the Text of This Standard
Annex F (Informative) Main Amendments of GB/T 7064-
