BS 4999-104(1988) : 1988 AMD 8875

National foreword
Committees responsible
Methods
Section one - Scope and object
1. Scope
2. Object
Section two - General
3. General
Section three - Terminology and methods of determination
4. Direct-axis synchronous reactance Xd
5. Short circuit ration Kc
6. Quadrature-axis synchronous reactance Xq
7. Direct-axis transient reactance X'd
8. Direct-axis subtransient reactance X"d
9. Quadrature-axis subtransient reactance X"q
10. Negative-sequence reactance X2
11. Negative-sequence resistance R2
12. Zero-sequence reactance X0
13. Zero-sequence resistance R0
14. Potier reactance Xp
15. Armature and excitation winding direct-current
    resistance Ra and Rf
16. Positive-sequence armature winding resistance R1
17. Direct-axis transient open-circuit time constant
    tau'do
18. Direct-axis transient short-circuit time constant
    tau'd
19. Direct-axis subtransient short-circuit time
    constant tau"d
20. Armature short-circuit time constant tau a
21. Acceleration time tau J
22. Stored energy constant H
23. Rated excitation current Ifn
24. Rated voltage regulation triangle Un
Section four - Description of the tests and determination
of machine quantities from these tests
25. No-load saturation test
26. Sustained three-phase short-circuit test
27. Determination of quantities from the no-load
    saturation and sustained three-phase short-circuit
    characteristics
28. Overexcitation test at zero power-factor
29. Determination of the excitation current corresponding
    to the rated voltage and rated armature current at
    zero power-factor (overexcitation)
30. Determination of Potier reactance from the no-load
    and sustained three-phase short-circuit character-
    istics and the excitation current corresponding to
    the rated voltage and rated armature current at zero
    power-factor (overexcited)
31. Determination of the rated excitation current by the
    Potier diagram
32. Determination of the rated excitation current by the
    ASA diagram
33. Determination of the rated excitation current by the
    Swedish diagram
34. Negative excitation test
35. Determination of Xq for the negative excitation test
36. Low slip test
37. Determination of Xq from the low slip test
38. On-load test measuring the load angle delta
39. Determination of Xq from the on-load test measuring
    the load angle
40. Sudden three-phase short-circuit test
41. Determination of quantities from the sudden three-
    phase short-circuit test
42. Voltage recover test
43. Determination of quantities from the voltage
    recovery test
44. Applied voltage test with the rotor in direct and
    quadrature axis positions with respect to the
    armature winding field axis
45. Determination of quantities from the applied voltage
    test with the rotor in direct and quadrature axis
    positions with respect to the armature winding field
    axis
46. Applied voltage test with the rotor in any arbitrary
    position
47. Determination of quantities from the applied voltage
    test with the rotor in any arbitrary position
48. Line-to-line sustained short-circuit test
49. Determination of quantities from the line-to-line
    sustained short-circuit test
50. Negative-phase sequence test
51. Determination of quantities from the negative-phase
    sequence test
52. Single-phase voltage application to the three-phase
    test
53. Determination of quantities from the single-phase
    voltage application to the three-phase test
54. Line-to-line and to neutral sustained short-circuit
    test
55. Determination of quantities from the line-to-line
    and to neutral sustained short-circuit test
56. Direct-current winding resistance measurements by
    the voltmeter and ammeter method and by the bridge
    method
57. Determination of winding d.c. resistance from the
    direct-current winding resistance measurements by
    the voltmeter and ammeter and by the bridge methods
58. Field current decay test with the armature winding
    open-circuited
59. Determination of tau'do from the field current decay
    test with the armature winding open-circuited
60. Field current decay test with the armature winding
    short-circuited
61. Determination of tau'd from the field current decay
    test with the armature winding short-circuited
62. Suspended rotor oscillation test
63. Determination of tau j and H from suspended rotor
    oscillation test
64. Auxiliary pendulum swing test
65. Determination of tau j and H from the auxiliary
    pendulum swing test
66. No-load retardation test
67. Determination of tau j and H from the no-load
    retardation test
68. On-load retardation test of mechanically coupled
    machines with the synchronous machine operation as
    a motor
69. Determination of tau j and H of mechanically coupled
    machines from the on-load retardation test with the
    synchronous machine operating as a motor
70. Acceleration after a load drop test with the machine
    operating as a generator
71. Determination of tau j and H of mechanically coupled
    machines from the acceleration after a load drop
    test with the machines operating as a generator
72. Determination of quantities by calculations using
    known test quantities
Table I
Appendix A - Unconfirmed test methods for determining
             synchronous machine quantities from tests
A1. Scope
A2. Object
A3. General
Terminology and methods of experimental study
A4. Excitation current corresponding to the rated
     armature short-circuit current (ifk)
A5. Direct-axis synchronous reactance Xd
A6. Quadrature-axis synchronous reactance Xq
A7. Direct-axis transient reactance X'd
A8. Quadrature-axis subtransient reactance X'q
A9. Quadrature-axis subtransient reactance X"q
A10. Negative-sequence reactance X2
A11. Armature-leakage reactance X sigma
A12. Initial starting impedance of synchronous motors Zst
A13. Direct-axis transient open-circuit time constant
     tau'do
A14. Direct-axis transient short-circuit time constant
     tau'd
A15. Quadrature-axis transient open-circuit time constant
     tau'go
A16. Quadrature-axis transient short-circuit time
     constant tau'q
A17. Direct-axis subtransient open-circuit time constant
     tau"do
A18. Quadrature-axis subtransient open-circuit time
     constant tau"qo
A19. Quadrature-axis subtransient short-circuit time
     constant tau"q
A20. Direct-axis open-circuit excitation winding time
     constant tau fdo
A21. Direct-axis open-circuit equivalent damper circuit
     time constant tau kdo
A22. Direct-axis short-circuit excitation winding time
     constant
A23. Direct-axis short-circuit equivalent damper winding
     time constant tau kd
A24. Frequency response characteristics
Description of the tests and determination of quantities
and characteristics from these tests
A25. to A63. Descriptions
Table IA
Reference list
Figures A1 to A23

Describes three-phase synchronous machines of 1 kVA rating and larger with frequency of not more than 400 Hz and not less than 15 Hz. Not intended to apply to special synchronous machines such as permanent-magnet field machines. While the tests also apply in general to brushless machines, certain variations do exist and special precautions should be taken. Covers terminology and methods of determination and description of the tests and determination of machine quantities from these tests. Comprises of some 80 pages. BS AMD 8875 RENUMBERS THIS STANDARD