A three phase synchronous generator

Assignment Help Physics

Reference no: EM1313475

Question: A three-phase synchronous generator is connected to a step-up transformer T1, which is connected to a 60km long transmission line. As the far end of the line, a step-down transformer bank T2 is connected. The secondary of T2 supplies two loads L1 & L2.

The ratings for the various parts of the system are as follows:

Generator

10 MVA, 12kV, X = 20%, star connected

T1
5 MVA, 12/69 kV, X = 10%

T2
5 MVA, 69/4.16 kV, X=10%

L12000 kVA at 0.8 pf lagging

L2
1000 kVA at 0.75 pf lagging

Transmission Line
X = 0.5 W/km (R is negligible)

[a.] Draw the per-phase equivalent circuit of the power system showing all reactance in per unit & show the base voltages used at various parts of the network. Use 10 MVA & 12 kV as base quantities in the generator circuit.

[b.] If the voltage on the load bus bar must be maintained at 4.16 kV, find the required excitation on the generator.

[c.] For this excitation, determine the short circuit current (in amperes) when a three-phase fault occurs on the secondary winding of transformer T2.

Reference no: EM1313475

Questions Cloud

Most important in determining development : Illustrate what factors seem to be most important in determining development also why

Level of significance-power of test : Would the null hypothesis be accepted or rejected in this case?

Determine the interest expense : Determine the interest expense has accrued on the bank loan and By what amount will the book value of the office equipment decline after the appropriate December adjustment is recorded?

How would you state alcohol also marijuana : On the basis of this information, Explain how would you state alcohol also marijuana.

A three phase synchronous generator : A three-phase synchronous generator is connected to a step-up transformer T1, which is connected to a 60km long transmission line. As the far end of the line, a step-down transformer bank T2 is connected. The secondary of T2 supplies two loads L..

The distance between the two charges of the dipole : Assume you are the fish. You get up every morning and weigh yourself (in water), and find you weigh 0.42 N. You, being a boxfish, are a box measuring 4.164 cm per side. You see a poor, hungry fisherman, and decide to be his dinner. You hook yourself,..

Finding marginal propensity to consume : What is the marginal propensity to consume. What is the slope of the consumption function (you should give a numerical answer, not a formula)?

Industry in long-run competitive equilibrium : Illustrate what are the firms ATC per unit at these three levels of production. If every firm in this industry has the similar cost structure, is the industry in long-run competitive equilibrium.

Computation of total interest on the investment : Computation of total interest on the investment and how much total interest income would the money market lender receive

User Account

All Pages