Question

a) Develop a five-bus 2-machine 132kV system of Fig. A (Refer to Annex 1 for how to develop a multi-bus system in PowerWorld.) b) Examine the fault levels at different buses. c) With a fault occurred on bus F, examine the fault flows in all the circuits and the infeeds from the two generators. d) Countercheck b) & c) results using hand-calculator. e) If $G_B$ or circuit BC is at outage, how would it affect b). B D $G_B$ $G_A$ A Fig. A 5-bus system Table A1: System impedance (pu. on 100MVA base) Generator pu $G_A$ * $G_B$ * C Circuit pu AB 0.1 AC 0.2 BC 0.125 BD 0.25 BF 0.333 F CF 0.5 DF 0.167 * to be assigned

          a) Develop a five-bus 2-machine 132kV system of Fig. A (Refer to Annex 1 for how to
develop a multi-bus system in PowerWorld.)
b) Examine the fault levels at different buses.
c) With a fault occurred on bus F, examine the fault flows in all the circuits and the
infeeds from the two generators.
d) Countercheck b) & c) results using hand-calculator.
e) If $G_B$ or circuit BC is at outage, how would it affect b).
B
D
$G_B$
$G_A$
A
Fig. A 5-bus system
Table A1: System impedance
(pu. on 100MVA base)
Generator
pu
$G_A$
*
$G_B$
*
C
Circuit
pu
AB
0.1
AC
0.2
BC
0.125
BD
0.25
BF
0.333
F
CF
0.5
DF
0.167
* to be assigned

a) Develop a five-bus 2-machine 132kV system of Fig. A (Refer to Annex 1 for how to
develop a multi-bus system in PowerWorld.)
b) Examine the fault levels at different buses.
c) With a fault occurred on bus F, examine the fault flows in all the circuits and the
infeeds from the two generators.
d) Countercheck b) c) results using hand-calculator.
e) If GB or circuit BC is at outage, how would it affect b).
B
D
GB
GA
A
Fig. A 5-bus system
Table A1: System impedance
(pu. on 100MVA base)
Generator
pu
GA
*
GB
*
C
Circuit
pu
AB
0.1
AC
0.2
BC
0.125
BD
0.25
BF
0.333
F
CF
0.5
DF
0.167
* to be assigned

Added by Rose R.

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