Stevenson J. Power system analysis
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6
CHAER II SYMMETRICAL COMPONENTS AND SEOUFN( 'I;. NI;WOI{KS
ground) are written from Fig. 11.1
4
as
v(O) =
-Q
V(
I
)
=
£
-/(l)Z
a
all
a
1
V(
2
)
=
a
(
11.
72)
where
£
/1/1 is the positive
-
sequence voltage to neutral, Z 1 and Z 2 arc the
positive- and negative-sequence impedances of the generator, respectively, and
2
0
is dened by Eq. (I 1.71).
The equations developed to this point are based on a simple mJchine
model which assumes the cxistence or ol1ly rU IllLlIllcnlal components or cur
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