Answer Happy

Hello, kindly solve the following question accordingly.
give answers to four decimal places.
thanks in advance
Part of a power system is illustrated in
the figure below. Three synchronous generators are connected in
parallel to the same 6.6 kV bus-bars (G1: 2 MVA, 0.08 pu; G2:
5 MVA, 0.12 pu, G3: 8 MVA, 0.16 pu). The feeder has reactance of
0.125 ΩΩ/km and is 20 km long. The remote end of the feeder is
connected to the primary of a 250 kVA, 6600/415 V/V
transformer, with reactance of 0.05 pu. Select the common power
base as 100 MVA.
a) Determine the generator
(xn') per unit reactance for the given common power
base
x1' = p.u.
x2' = p.u.
x3' = p.u.
Calculate the per-unit and absolute values of the fault level
and fault current if a three-phase short circuit takes place on the
6.6 kV bus-bars (point 1 in the figure
)
isc = p.u.
ssc = p.u.
Isc = kA
Ssc = MVA
b) Calculate the feeder and transformer
per unit reactance (using the base voltage and base power of 6.6 kV
and 100 MVA)
xc = p.u. (feeder)
xtr = p.u. (transformer)
Calculate the per-unit and absolute values of the fault level
and fault current if a three-phase short circuit takes place on the
secondary of the transformer (point 2 in the figure
)
isc = p.u.
ssc = p.u.
Isc = kA
Ssc = MVA
c) Using the text box below, discuss the
method of analysis that has to be used in the case of asymmetrical
faults. Which are the most important asymmetrical faults
G1 Feeder (2 G2 2 Yyo G3 1 7