Page 85 - Handbook of Electrical Engineering
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SYNCHRONOUS GENERATORS AND MOTORS 65
Figure 3.1 Phasor diagram of a two-axis salient pole generator.
R a = 0.002
X d = 2.5 X q = 0.9
X = 0.18 X = X q
d q
X = 0.1 X = 0.15
q
d
3.4 THE DERIVED REACTANCES
The derived reactances were described in sub-section 3.2 in relation to their effect on armature
reaction. They are derived from the actual winding reactances by the standard equations, for example
References 8 and 9.
Direct axis:
X d = X a + X md (3.1)
X md X f
X = X a + (3.2)
d X a + X f
X md + X f
X md X f X kd
X = X a + (3.3)
d
X md X f + X md X kd + X f X kd
X f X kd
X a +
X f + X kd
