Question

In: Electrical Engineering

NB: may you please explain the phasor diagram used to get the reactance. draw phasor gor...

NB: may you please explain the phasor diagram used to get the reactance. draw phasor gor both scenario. That will be highly appreciated.

5. A given 3-MVA, 50-Hz, 11-kV, 3φ, Y-connected alternator when supplying 100 A at zero p.f. leading has a line-to-line voltage of 12,370 V; when the load is removed, the terminal voltage falls down to 11,000 V. Predict the regulation of the alternator when supplying full-load at 0.8 p.f. lagging. Assume an effective resistance of 0.4 Ω per phase. [13.5%]

Solutions

Expert Solution

Ans)

Given line voltages

  

phase voltages are

Given load current is

phasor diagram for this load is

from the phasor diagram above using inner triangle

is the reactance of the generator

=======

Now for full load 0.8 pf lagging

full load current is

regulation at this current is

this answer is calculated using matlab hence it is accurate ,if you use hand calculator neglecting some decimals you will get 13.5 % as given in answer

Phasor diagram at this load is


Related Solutions

may you please draw phasor diagram for each case and explain. the answer will be highly...
may you please draw phasor diagram for each case and explain. the answer will be highly appreciated A 3-phase star- connected alternator has a resistance of 0.5 Ω and a synchronous reactance of 5 Ω per phase. It is excited to give 6600 V (line) on open circuit. Determine the terminal voltage and per unit voltage regulation on full load current of 130 V when the load power factor is a. 0.8 lagging [V=3340V, V.R= 14.1%] b. 0.6 leading [V=4.260...
1. What is reactance and why is different from resistance? 2. What is a phasor diagram...
1. What is reactance and why is different from resistance? 2. What is a phasor diagram and how is it useful? (No Star Trek answers, please.)
Please explain your answers and use Excel to show the excel formula you used to get...
Please explain your answers and use Excel to show the excel formula you used to get your solution. 6. A manufacturing process produces connecting rods whose diameter is normally distributed with mean 1.495 cm and standard deviation .05 cm. In what range will the “middle 80%” of the diameters lie? What about the “middle 98%”?
Please design the network and draw the network diagram. You have the freedom to assume the...
Please design the network and draw the network diagram. You have the freedom to assume the internal network structure. In the diagram, in addition to the 2 servers, you should also include a few desktop computers and a printer. Please explain the rationale on why you put a computer or a printer in its designated location, 1 example for each location. A subnet (or a segment) is regarded as the same location. (hint: a firewall or a few firewalls, depending...
Can you please explain how to get the primers?
Can you please explain how to get the primers?
Draw a UML diagram that describes a class that will be used to describe a product...
Draw a UML diagram that describes a class that will be used to describe a product for sale on Glamazon.com. The product has a name, a description, a price, ratings by many customers (1 to 5 stars), and a group of customer comments. New products have no ratings or comments by customers, but do have a name, description and price. The price can be changed and more customer ratings and comments can be added. A global average rating of all...
Explain 5-Forces Model. Draw diagram to explain the model.
Explain 5-Forces Model. Draw diagram to explain the model.
***Please DRAW CASH FLOW diagram*** A small commercial building contractor purchased a used crane 2 years...
***Please DRAW CASH FLOW diagram*** A small commercial building contractor purchased a used crane 2 years ago for $60,000. Its operating cost was $2,500 in month one, $2,550 in month two, and amounts increasing by $50 per month through the end of year two (now). If the crane was sold for $48,000 now, what was its equivalent monthly cost at an interest rate of 1% per month?
Create a diagram and explain the right-hand rule for the motor principle. Draw a diagram of...
Create a diagram and explain the right-hand rule for the motor principle. Draw a diagram of a single loop DC motor and label all the parts. Write a few sentences explaining how the motor is able to spin. thank you
Draw and explain the SWOT analysis diagram of Qualcomm company ?
Draw and explain the SWOT analysis diagram of Qualcomm company ?
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT