Page 41 - Practical Power System and Protective Relays Commissioning
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Generators and Motors: Theory and Testing Chapter | 4 37
X SG subtransient X SG transient X SG steady state
5 X L 1 X a == X F == X D 5 X L1 X a == X F 5 X L 1 X a
X L 5 Leakage reactance R L 5 Leakage resistance R a 5 Armature
resistance
X F 5 Field reactance R F 5 Field resistance
X D 5 Damping bars reactance R D 5 Damping bars
resistance
FIGURE 4.5 Steady-state representation of a synchronous generator.
FIGURE 4.6 Synchronous machine reactance in subtransient, transient, and steady-state.
Generator networks generate a large amount of heat. The limitation of
generator operation due to heating follows the generator capability curves as
shown in Fig. 4.7.
