Question 1 In the system shown below, the generator is ideal (Xg = 0) and the magnitude of the load bus voltage, V1, is to be held at 11 kV. Working on a system base of 25 MVA and a base voltage of 10 kV at the load side: a) Draw the single-phase equivalent pu reactance diagram. b) Calculate the current I load in per unit c) Calculate the current I generator in A d) Calculate the Power in VA generated, consumed and lost %3D

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Question 1
In the system shown below, the generator is ideal (XG = 0) and the magnitude of
the load bus voltage, V1, is to be held at 11 kV. Working on a system base of 25
MVA and a base voltage of 10 kV at the load side:
a) Draw the single-phase equivalent pu reactance diagram.
b) Calculate the current I load in per unit
c) Calculate the current I generator in A
d) Calculate the Power in VA generated, consumed and lost
Transformer 1
20 MVA
15kV : 60 kV
X = 5%
Transformer 2
20 MVA
50 kV : 11 kV
X = 6%
to
Line
X = 200
Load
S = 12 MVA
pf = 0.85 lag
VG
VT1
VT2
VL
Transcribed Image Text:Question 1 In the system shown below, the generator is ideal (XG = 0) and the magnitude of the load bus voltage, V1, is to be held at 11 kV. Working on a system base of 25 MVA and a base voltage of 10 kV at the load side: a) Draw the single-phase equivalent pu reactance diagram. b) Calculate the current I load in per unit c) Calculate the current I generator in A d) Calculate the Power in VA generated, consumed and lost Transformer 1 20 MVA 15kV : 60 kV X = 5% Transformer 2 20 MVA 50 kV : 11 kV X = 6% to Line X = 200 Load S = 12 MVA pf = 0.85 lag VG VT1 VT2 VL
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