Refer to the 5-bus data given below. Sbase = 400 MVA, the base voltage is 15.0 kV for buses 1 and 3, and 345 kV for buses 2, 4, 5. Note that 1-5 and 3-4 are 15/345 kV transformers. a) Draw a one-line diagram of the power system. b) Find the elements Y23, Y43, Y11 Y33 of the system bus admittance matrix.

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
Chapter6: Power Flows
Section: Chapter Questions
Problem 6.43P
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Refer to the 5-bus data given below. Sbase = 400 MVA, the base voltage is 15.0 kV for buses 1 and 3, and 345 kV for buses 2, 4, 5. Note that 1-5 and 3-4 are 15/345 kV transformers.
a) Draw a one-line diagram of the power system.
b) Find the elements Y23, Y43, Y11 Y33 of the system bus admittance matrix.

Table 1 - Bus Input Data for Problem 5
Bus No.
Туре
V
Angle
PG
QG
PL
QL
per unit
degrees
MW
MVAR
MW
MVAR
1
swing
1.0
0.0
0.000
0.000
---
---
load
0.0
0.0
800.0
280.0
---
3
generator
1.05
520.0
80.0
40.0
4
load
0.0
0.0
0.0
0.0
---
load
0.0
0.0
0.0
0.0
---
---
Table 2 - Line Input Data for Problem 5
Line No.
From
То
R
B/2
Tap ratio
Bus
Bus
per unit per unit
per unit
per unit
1
1
5
0.006
0.08
1.0
---
4
0.036
0.4
0.215
3
2
0.018
0.2
0.110
4
3
4
0.003
0.04
1.0
5
4
0.009
0.1
0.055
--
2.
2.
Transcribed Image Text:Table 1 - Bus Input Data for Problem 5 Bus No. Туре V Angle PG QG PL QL per unit degrees MW MVAR MW MVAR 1 swing 1.0 0.0 0.000 0.000 --- --- load 0.0 0.0 800.0 280.0 --- 3 generator 1.05 520.0 80.0 40.0 4 load 0.0 0.0 0.0 0.0 --- load 0.0 0.0 0.0 0.0 --- --- Table 2 - Line Input Data for Problem 5 Line No. From То R B/2 Tap ratio Bus Bus per unit per unit per unit per unit 1 1 5 0.006 0.08 1.0 --- 4 0.036 0.4 0.215 3 2 0.018 0.2 0.110 4 3 4 0.003 0.04 1.0 5 4 0.009 0.1 0.055 -- 2. 2.
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