Page 245 - Electrical Equipment Handbook _ Troubleshooting and Maintenance

SYNCHRONOUS GENERATORS

12.8 CHAPTER TWELVE

When the effects of the stator windings self-
inductance L (and its corresponding reactance
A
X ) and resistance R are added, the relationship
A A
becomes:
V E jXI jX I R I

A
A A
A A
A
When the effects of the armature reaction and
self-inductance are combined (the reactances
are added), the synchronous reactance of the
FIGURE 12.9 A simple circuit (see text). generator is
X X X
S A
The final equation becomes
V E jX I R I

A A
A
S A
Figure 12.10 illustrates the equivalent circuit of a three-phase synchronous generator.
The rotor field circuit is supplied by dc power which is modeled by the coil’s inductance

FIGURE 12.10 The full equivalent circuit of a three-phase synchronous generator.

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