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Power Systems
PU Impedance/ Reactance Diagram of a Power System
A transmissio...
Question
A transmission line has 0.1 pu impedance on a base of 132 kV, 100 MVA. The pu impedance on a base of 220 kV, 50 MVA is ____pu.
0.018
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Solution
The correct option is
A
0.018
X
p
u
(
n
e
w
)
X
p
u
(
o
l
d
)
=
(
M
V
A
)
n
e
w
(
M
V
A
)
o
l
d
×
(
k
V
)
2
o
l
d
(
k
V
)
2
n
e
w
X
p
u
0.1
=
50
100
×
(
132
220
)
2
X
p
u
=
0.018
p
u
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