A part of the power system is represented by the one-line diagram shown below. The system supplies a load of 40 MW at 66 kV with a power factor of 0.8 leading. Use the per unit method to find the following parameters, given that the base values in the Tranmission Line zone are 100 MVA and 130 kV. || 100 MVA 275/130 kV X=0.1j p.u. ZTL=3.48j 2 th 50 MVA 130/66 kV X=0.04j p.u.

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A part of the power system is represented by the one-line diagram shown below. The system
supplies a load of 40 MW at 66 kV with a power factor of 0.8 leading. Use the per unit method
to find the following parameters, given that the base values in the Tranmission Line zone are
100 MVA and 130 kV.
+ 1776, 136px
Vg
I
100 MVA
275/130 kV
X=0.1j p.u.
100
ZTL=3.48jQ2
th
H
a) Find Zbase and Ibase in each zone.
b) Plot the equivelent single phase system in per unit labeling all the components with their
values.
1 1777 x 888px
50 MVA
130/66 kV
X=0.04j p.u.
c) Find the source voltage Vg in V.
d) Find the power injected to the system from the power station side in MVA.
e) Find the efficincy of the system.
Transcribed Image Text:A part of the power system is represented by the one-line diagram shown below. The system supplies a load of 40 MW at 66 kV with a power factor of 0.8 leading. Use the per unit method to find the following parameters, given that the base values in the Tranmission Line zone are 100 MVA and 130 kV. + 1776, 136px Vg I 100 MVA 275/130 kV X=0.1j p.u. 100 ZTL=3.48jQ2 th H a) Find Zbase and Ibase in each zone. b) Plot the equivelent single phase system in per unit labeling all the components with their values. 1 1777 x 888px 50 MVA 130/66 kV X=0.04j p.u. c) Find the source voltage Vg in V. d) Find the power injected to the system from the power station side in MVA. e) Find the efficincy of the system.
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