2. A simple three-phase power system is shown in the figure below. Assume that the ratings of the various devices in this system are as follows: Generator Gl: 250 MVA, 13.8 kV, R=0.1 pu, X = 1.0 pu. Generator G2: 500 MVA, 20.0 kV, R=0.1 pu, X-1.2 pu. Generator G3: 250 MVA, 13.8 kV, R = 0.15 pu, X = 1.0 pu. Transformer TI: 250 MVA, 13.8/240 kV, R = 0.01 pu, X = 0.10 pu. Transformer T2: 500 MVA, 20.0/240 kV, R = 0.01 pu, X = 0.08 pu. Transformer T3: 250 MVA, 13.8/240 kV, R = 0.01 pu, X = 0.10 pu. Each Line: R = 82, X = 40 2. Region 1 0 roto Region 4 O Region 2 Ⓡ Cook T₂ Region 3 YA G₂ 00 G₂ Convert this power system to per-unit on a base of 500 MVA at 20 kV at generator G2 and draw the per-unit per-phase equivalent circuit of this system.

Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter4: Transmission Line Parameters
Section: Chapter Questions
Problem 4.31P: Figure 4.37 shows the conductor configuration of a three-phase transmission line and a telephone...
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4.4
2. A simple three-phase power system is shown in the figure below. Assume that the
ratings of the various devices in this system are as follows:
Generator G1 : 250 MVA, 13.8 kV, R = 0.1 pu, X = 1.0 pu.
Generator G2 : 500 MVA, 20.0 kV, R = 0.1 pu, X =1.2 pu.
Generator G3: 250 MVA, 13.8 kV, R = 0.15 pu, X = 1.0 pu.
Transformer T1 : 250 MVA, 13.8/240 kV, R = 0.01 pu, X = 0.10 pu.
Transformer T2: 500 MVA, 20.0/240 kV, R = 0.01 pu, X = 0.08 pu.
Transformer T3: 250 MVA, 13.8/240 kV, R = 0.01 pu, X = 0.10 pu.
Each Line: R= 82, X = 40 S.
Region I
G
TO
Region 4
T₁
Region 2
머
DX
of
YA
Region 3
Y
Convert this power system to per-unit on a base of 500 MVA at 20 kV at generator G2
and draw the per-unit per-phase equivalent circuit of this system.
Transcribed Image Text:fen 4.4 2. A simple three-phase power system is shown in the figure below. Assume that the ratings of the various devices in this system are as follows: Generator G1 : 250 MVA, 13.8 kV, R = 0.1 pu, X = 1.0 pu. Generator G2 : 500 MVA, 20.0 kV, R = 0.1 pu, X =1.2 pu. Generator G3: 250 MVA, 13.8 kV, R = 0.15 pu, X = 1.0 pu. Transformer T1 : 250 MVA, 13.8/240 kV, R = 0.01 pu, X = 0.10 pu. Transformer T2: 500 MVA, 20.0/240 kV, R = 0.01 pu, X = 0.08 pu. Transformer T3: 250 MVA, 13.8/240 kV, R = 0.01 pu, X = 0.10 pu. Each Line: R= 82, X = 40 S. Region I G TO Region 4 T₁ Region 2 머 DX of YA Region 3 Y Convert this power system to per-unit on a base of 500 MVA at 20 kV at generator G2 and draw the per-unit per-phase equivalent circuit of this system.
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