popandpops
Newbie level 3
I will give 50$ by paypal if you solve this power system problem.
Iam trying to solve it by Friday morning.. am using power system analysis and design as reference. I can send u the problem by pdf if you wish.
thanks
u can see the image here
https://obrazki.elektroda.pl/69_1222213955.jpg
The three-phase system below has one generator, a step-up transformer, and a
transmission line. The data for each part of the system is given in the table below. The
frequency is 60 Hz.
Line: 1272 kcmil ACSR, flat (horizontal) phase conductors 18 ft apart.
Transformer T1: 120 MVA, 15 kV: 230 kV, X = 10%.
Generator G1: 100 MVA, 15 kV, Xd = Xq = 110 %.
Neglect all resistances. Transformer and generator data are given in % on a rating base.
Convert all reactances to per unit on a 100 MVA base using 230 kV as the base voltage
for the high-voltage system.
Given the load voltage is 230 kV (LL) and the load power is 50 MVA (3 phase) at a
power factor of 0.90 lagging. Calculate the load current phasor. Calculate P and Q at the
load. Calculate the phasor voltages VT and VG. Calculate the excitation voltage E for the
generator (neglect saliency). Calculate P and Q on the transformer high-voltage side and
on the low-voltage side. The calculation should be done in per unit, then all the answers
coverted to SI units. Use engineering notation (i.e., kV, MW, and MVAr) for ease of
understanding the results.
Since losses are neglected, the load real power should be identical to the transformer
output real power and to the generator output real power. Does your calculation show
this (at least to within round-off error)? Round answers off to three significant figures,
since more than that is meaningless (since the data is not given to more than three
significant figures).
Iam trying to solve it by Friday morning.. am using power system analysis and design as reference. I can send u the problem by pdf if you wish.
thanks
u can see the image here
https://obrazki.elektroda.pl/69_1222213955.jpg
The three-phase system below has one generator, a step-up transformer, and a
transmission line. The data for each part of the system is given in the table below. The
frequency is 60 Hz.
Line: 1272 kcmil ACSR, flat (horizontal) phase conductors 18 ft apart.
Transformer T1: 120 MVA, 15 kV: 230 kV, X = 10%.
Generator G1: 100 MVA, 15 kV, Xd = Xq = 110 %.
Neglect all resistances. Transformer and generator data are given in % on a rating base.
Convert all reactances to per unit on a 100 MVA base using 230 kV as the base voltage
for the high-voltage system.
Given the load voltage is 230 kV (LL) and the load power is 50 MVA (3 phase) at a
power factor of 0.90 lagging. Calculate the load current phasor. Calculate P and Q at the
load. Calculate the phasor voltages VT and VG. Calculate the excitation voltage E for the
generator (neglect saliency). Calculate P and Q on the transformer high-voltage side and
on the low-voltage side. The calculation should be done in per unit, then all the answers
coverted to SI units. Use engineering notation (i.e., kV, MW, and MVAr) for ease of
understanding the results.
Since losses are neglected, the load real power should be identical to the transformer
output real power and to the generator output real power. Does your calculation show
this (at least to within round-off error)? Round answers off to three significant figures,
since more than that is meaningless (since the data is not given to more than three
significant figures).