Ee 456: power system analysis i

EE 456: Power System Analysis I

Homework 1:

1. The electric current and voltage at one terminal of a single phase transmission line are:

141cos( 10 ),

390cos( 5 ),

I t A

V t V

 

 

Compute the rms values of the electric current and voltage, the complex power, and the real and

reactive power flowing into the line.

2. Two single-phase ideal voltage sources are connected by a line of impedance of 0.7 j2.4

as shown in Fig. 1. V1 50016.26V and V2 585 0V. Plot   V1,V2 and I12 in a phasor

diagram. Also, find the real and reactive power loss in the line.

Fig. 1

3. A single-phase inductive load consisting of R and X in series feeding from a 2400-V rms

single-phase supply absorbs 288 kW at a lagging power factor of 0.8. Determine R and X.

4. The system shown in Fig. 2 is balanced. Assume that:

10 15

ca 208 120

Z

V V

  

 

Find Vab ,Vbc ,Van ,Vbn ,Vcn , Ia , Ib and Ic

Fig. 2

5. A balanced delta-connected load consisting of a pure resistances of 18 per phase is in

parallel with a purely resistive balanced Y-connected load of 12per phase as shown in Fig. 3.

The combination is connected to a three-phase balanced supply of 346.41-V rms (line-to-line) via

a three-phase line having an inductive reactance of j3per phase. Taking the phase voltage Van

as reference, determine

(a) The magnitudes of current, real power, and reactive power drawn from the supply.

(b) The line-to-neutral and the line-to-line voltage magnitudes of phase a at the combined load

terminals.

Fig. 3

Calculate the price
Pages (550 words)
\$0.00
*Price with a welcome 15% discount applied.
Pro tip: If you want to save more money and pay the lowest price, you need to set a more extended deadline.
We know how difficult it is to be a student these days. That's why our prices are one of the most affordable on the market, and there are no hidden fees.

Instead, we offer bonuses, discounts, and free services to make your experience outstanding.
How it works
Receive a 100% original paper that will pass Turnitin from a top essay writing service
step 1
Fill out the order form and provide paper details. You can even attach screenshots or add additional instructions later. If something is not clear or missing, the writer will contact you for clarification.
Pro service tips
How to get the most out of your experience with Australia Assessments
One writer throughout the entire course
If you like the writer, you can hire them again. Just copy & paste their ID on the order form ("Preferred Writer's ID" field). This way, your vocabulary will be uniform, and the writer will be aware of your needs.
The same paper from different writers
You can order essay or any other work from two different writers to choose the best one or give another version to a friend. This can be done through the add-on "Same paper from another writer."
Copy of sources used by the writer
Our college essay writers work with ScienceDirect and other databases. They can send you articles or materials used in PDF or through screenshots. Just tick the "Copy of sources" field on the order form.
Testimonials
See why 20k+ students have chosen us as their sole writing assistance provider
Check out the latest reviews and opinions submitted by real customers worldwide and make an informed decision.
Military
Excellent work
Customer 456821, October 11th, 2022
Excellent.
Customer 460073, July 9th, 2022
Excellent work!
Customer 453377, May 20th, 2022
Beauty
Good job. Always limit quoted content even when instructed to use them.
Customer 452441, March 31st, 2022
Retail
Customer 463463, November 11th, 2022
Military
Good work.
Customer 456821, May 11th, 2022
Marketing
This is a great paper, can't wait to get my grade back
Customer 453633, February 5th, 2020
SEO
Great work.Recommendable
Customer 463647, May 14th, 2023
Fitness
Well-researched content.
Customer 463473, October 25th, 2022
Classic English Literature
Good work.
Customer 460021, June 3rd, 2022
Federal government
Good content.
Customer 462687, April 4th, 2022
Computer science
Excellent.
Customer 462387, April 4th, 2022
11,595
Customer reviews in total
96%
Current satisfaction rate
3 pages
Average paper length
37%
Customers referred by a friend