Stevenson J. Power system analysis
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7.2 MUTUALLY COUPLED BRANCHES IN
Ybu
.
7
node equations 1m = la and I
n
=
-
10; similarly, branch current lb is related to
the currents 1 p and 1 q by the two node equations 1 p
= 1 b and 1
q = -lb' These
four current equations arranged in matrix form become
@
®
®
1
- 1
o
o
o -1
(7.16)
with the coecient matrix equal to the transpose of that in Eq. (7
.
15). From Eq.
(7.15) we substitute for the voltage drops of Eq. (7.14) to nd
V
III
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