Question: A 5 0 - MVA, 1 2 . 5 kV generator has a direct - axis sub - transient reactance of 0 . 2 5

A 50-MVA, 12.5 kV generator has a direct-axis sub-transient reactance of 0.25 per unit. The negative- and zero-sequence reactances are, respectively, 0.35 and 0.10 per unit. The neutral of the generator is solidly grounded. When a single line-to-ground fault occurs at the generator terminals with the generator operating unloaded at rated voltage, determine (a) the sub-transient current (in amperes) in the generator, and (b) the line-to-line voltages (in kV) for sub-transient conditions.

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer
Step: 1 Unlock blur-text-image
Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock
Step: 3 Unlock

Students Have Also Explored These Related Electrical Engineering Questions!

Q:

A three-phase, 10-MVA, 4.16-kV generator with sub transient reactance X d = 20% feeds a three-phase, 1-MVA, 4.16 kV/480 V transformer with X trfr = 5% via a cable that has the leakage reactance X...

Q:

PW 9.62 Re-determine the Example 9.8 fault currents, except with a new line installed between buses 2 and 4. The parameters for this new line should be identical to those of the ex- isting line...

Q:

the impedence values in question 4 is j0.25 and the reactance is 0.5 10 10 6 1. For the system data given below draw the single line diagram. Represent the power, voltage and impedances in per units...

Q:

Re-determine the Example 9_8 fault currents, except with a second generator added at bus 3. The parameters for the new generator should be identical to those of the existing generator at bus 3. Are...

Q:

Re-determine the Example 9_8 fault currents, except with a new line installed between buses 2 and 5. The parameters for this new line should be identical to those of the existing line between buses 2...

Q:

1. A 100 MVA, 20 kV alternator has X 1 = X 2 = 0.20 pu and X 0 = 0.05 pu. The neutral of the generator is grounded through a reactor. Find the ohmic value of reactor to limit the current for a single...

Q:

i need al the work and lab simulations and pre labs and calculations. LAB SIMULATIONS MUST BE ON PROTEUS ISIS INTRODUCTION: Linear circuit elements resistors, capacitors, and inductors are the...

Q:

Part a ) Draw the zero, positive, and negative sequence networks Part b ) Find the Thevenin equivalent for the fault at bus 3 Part c ) Determine the sub transient fault current in per - unit and in...

Q:

Figure 2 shows a power system network with three unit of conventional generator, G., G, and Gs. Then, a distributed generator, DG, is comected to Bus 9 to improve supply reliability of the power...

Q:

Hello, you already did chapter 1 and 2 of my MASTERS Thesis already for me. (See attached) So normally you know masters thesis consist of 5 chapters right ??..... But in this case my thesis will be 4...

Q:

For each of the following cases, indicate(a) To what rate columns, and(b) To what number of periods you would refer in looking up the interest factor.1. In a future value of 1 table: 2. In a present...

Q:

Recall that a function f is an even function if f(-x) = f(x) for all x;f is called an odd function if f (- x) = - f(x) for all x. (a) Prove that if f is an odd function. (b) Prove that the Fourier...

Q:

Miguel used to live in Montana and became a California resident last tax year. This year Miguel has interest income from a savings account in Montana. Is the interest income taxable by California?

Q:

Flannery and Everly's Crisis Intervention Model also more explicitly tends to the importance of making sense of events. During times of extreme trauma, information is not processed in the same way...