Homework Help is Here – Start Your Trial Now!
Engineering
Electrical Engineering
3. A 13.8-kV, 50-MVA, 0.9-power-factor-lagging, 60-Hz, four-pole Y- connected synchronous generator has a synchronous reactance of 2.5 2 and an armature resistance of 0.2 2. At 60 Hz, its friction and windage losses are 1 MW, and its core losses are 1.5 MW. The field circuit has a dc voltage of 120 V, and the maximum field current is 10 A. The current of the field circuit is adjustable from 0 to 10 A. The OCC of this generator is shown in Figure below. a. How much field current is required to make the terminal voltage V (or line voltage) equal to 13.8 kV when the generator is running at no load? b. What is the internal generated voltage A of this machine at rated conditions? E c. What is the phase voltage Vo of this generator at rated conditions? d. How much field current is required to make the terminal voltage V equal to 13.8 kV when the generator is running at rated conditions? e. Suppose that this generator is running at rated conditions, and then the load is removed without changing the field current. What would the terminal voltage of the generator be? f. How much steady-state power and torque must the generator's prime mover be capable of supplying to handle the rated conditions? g. Construct a capability curve for this generator.

3. A 13.8-kV, 50-MVA, 0.9-power-factor-lagging, 60-Hz, four-pole Y- connected synchronous generator has a synchronous reactance of 2.5 2 and an armature resistance of 0.2 2. At 60 Hz, its friction and windage losses are 1 MW, and its core losses are 1.5 MW. The field circuit has a dc voltage of 120 V, and the maximum field current is 10 A. The current of the field circuit is adjustable from 0 to 10 A. The OCC of this generator is shown in Figure below. a. How much field current is required to make the terminal voltage V (or line voltage) equal to 13.8 kV when the generator is running at no load? b. What is the internal generated voltage A of this machine at rated conditions? E c. What is the phase voltage Vo of this generator at rated conditions? d. How much field current is required to make the terminal voltage V equal to 13.8 kV when the generator is running at rated conditions? e. Suppose that this generator is running at rated conditions, and then the load is removed without changing the field current. What would the terminal voltage of the generator be? f. How much steady-state power and torque must the generator's prime mover be capable of supplying to handle the rated conditions? g. Construct a capability curve for this generator.

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
See similar textbooks
icon
Related questions
Question
Please answer problem 4. I attached problem 3 because problem 4 required problem 3
3. A 13.8-kV, 50-MVA, 0.9-power-factor-lagging, 60-Hz, four-pole Y- connected synchronous generator has a synchronous reactance of 2.5 and an armature resistance of 0.2 2. At 60 Hz, its friction and windage losses are 1 MW, and its core losses are 1.5 MW. The field circuit has a dc voltage of 120 V, and the maximum field current is 10 A. The current of the field circuit is adjustable from 0 to 10 A. The OCC of this generator is shown in Figure below. a. How much field current is required to make the terminal voltage V (or line voltage) equal to 13.8 kV when the generator is running at no load? b. What is the internal generated voltage A of this machine at rated conditions? E c. What is the phase voltage Vo of this generator at rated conditions? d. How much field current is required to make the terminal voltage V equal to 13.8 kV when the generator is running at rated conditions? e. Suppose that this generator is running at rated conditions, and then the load is removed without changing the field current. What would the terminal voltage of the generator be? f. How much steady-state power and torque must the generator's prime mover be capable of supplying to handle the rated conditions? g. Construct a capability curve for this generator.
Transcribed Image Text:3. A 13.8-kV, 50-MVA, 0.9-power-factor-lagging, 60-Hz, four-pole Y- connected synchronous generator has a synchronous reactance of 2.5 and an armature resistance of 0.2 2. At 60 Hz, its friction and windage losses are 1 MW, and its core losses are 1.5 MW. The field circuit has a dc voltage of 120 V, and the maximum field current is 10 A. The current of the field circuit is adjustable from 0 to 10 A. The OCC of this generator is shown in Figure below. a. How much field current is required to make the terminal voltage V (or line voltage) equal to 13.8 kV when the generator is running at no load? b. What is the internal generated voltage A of this machine at rated conditions? E c. What is the phase voltage Vo of this generator at rated conditions? d. How much field current is required to make the terminal voltage V equal to 13.8 kV when the generator is running at rated conditions? e. Suppose that this generator is running at rated conditions, and then the load is removed without changing the field current. What would the terminal voltage of the generator be? f. How much steady-state power and torque must the generator's prime mover be capable of supplying to handle the rated conditions? g. Construct a capability curve for this generator.
4. Assume that the field current of the generator in Problem 3 is adjusted to achieve rated voltage (13.8 kV) at full load conditions in each of the questions below. a) What is the efficiency of the generator at rated load? b) What is the voltage regulation of the generator if it is loaded to rated kilovoltamperes with 0.9 PF-lagging loads? c) What is the voltage regulation of the generator if it is loaded to rated kilovoltamperes with 0.9 PF-leading loads? d) What is the voltage regulation of the generator if it is loaded to rated kilovoltamperes with unity power-factor loads?
Transcribed Image Text:4. Assume that the field current of the generator in Problem 3 is adjusted to achieve rated voltage (13.8 kV) at full load conditions in each of the questions below. a) What is the efficiency of the generator at rated load? b) What is the voltage regulation of the generator if it is loaded to rated kilovoltamperes with 0.9 PF-lagging loads? c) What is the voltage regulation of the generator if it is loaded to rated kilovoltamperes with 0.9 PF-leading loads? d) What is the voltage regulation of the generator if it is loaded to rated kilovoltamperes with unity power-factor loads?
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 4 steps with 3 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Stability Analysis in Power System
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.
Similar questions
Recommended textbooks for you
Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
Electrical Engineering
ISBN:
9780133923605
Author:
Robert L. Boylestad
Publisher:
PEARSON
Delmar's Standard Textbook Of Electricity
Delmar's Standard Textbook Of Electricity
Electrical Engineering
ISBN:
9781337900348
Author:
Stephen L. Herman
Publisher:
Cengage Learning
Programmable Logic Controllers
Programmable Logic Controllers
Electrical Engineering
ISBN:
9780073373843
Author:
Frank D. Petruzella
Publisher:
McGraw-Hill Education
Fundamentals of Electric Circuits
Fundamentals of Electric Circuits
Electrical Engineering
ISBN:
9780078028229
Author:
Charles K Alexander, Matthew Sadiku
Publisher:
McGraw-Hill Education
Electric Circuits. (11th Edition)
Electric Circuits. (11th Edition)
Electrical Engineering
ISBN:
9780134746968
Author:
James W. Nilsson, Susan Riedel
Publisher:
PEARSON
Engineering Electromagnetics
Engineering Electromagnetics
Electrical Engineering
ISBN:
9780078028151
Author:
Hayt, William H. (william Hart), Jr, BUCK, John A.
Publisher:
Mcgraw-hill Education,
SEE MORE TEXTBOOKS