Homework Help is Here – Start Your Trial Now!
Engineering
Electrical Engineering
5. A 500-km, 500-kV, 60-Hz uncompensated three-phase line has a positive-sequence series impedance z = 0.03 + j0.35 N/km and a positive-sequence shunt admittance c) The exact ABCD y = j4.4 x 10-6 S/km. Calculate: a) Zc, b) (yl), parameters for this line. NB cosh(a + jb) = cosha.cosb + sinha. sinb

5. A 500-km, 500-kV, 60-Hz uncompensated three-phase line has a positive-sequence series impedance z = 0.03 + j0.35 N/km and a positive-sequence shunt admittance c) The exact ABCD y = j4.4 x 10-6 S/km. Calculate: a) Zc, b) (yl), parameters for this line. NB cosh(a + jb) = cosha.cosb + sinha. sinb

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 question 5 with explanation
1. A 275 kV three-phase transmission line of length 96 km is rated at 800 A. The values of resistance, inductance and capacitance per phase per kilometre are 0.078 V, 1.056 mH and 0.029 mF, respectively. The receiving-end voltage is 275 kV when full load is transmitted at 0.9 power factor lagging. Calculate the sending-end voltage and current, and the transmission efficiency, and compare with the answer obtained by the short-line representation. Use the nominal pi and T methods of solution. The frequency is 60 Hz. (Answer: V 179 kV per phase) 2. A 220 kV, 60 Hz three-phase transmission line is 320 km long and has the following constants per phase per km: Inductance 0.81 mH Capacitance 12.8 mF Resistance 0.038 V Ignore leakage conductance. If the line delivers a load of 300 A, 0.8 power factor lagging, at a voltage of 220 kV, calculate the sending-end voltage. Determine the p circuit which will represent the line. (Answer: Vs = 241 kV) 3. Calculate the A B C D constants for a 275 kV overhead line of length 83 km. The parameters per kilometre are as follows: Resistance 0.078 2 Reactance 0.33 2 Admittance (shunt capacitative) 9.53 × 10-6 siemens. The shunt conductance is zero. (Answer: [A = 0.98917 + j0.00256; B = 6.474 + j27.39; C = (-1.0126 × 10-6 + j 7.8671 × 10-¹)] 4. A 132 kV, 60 Hz transmission line has the following generalized constants: A = 0.969620.49, B = 52.88274.79 , C = 0.001177/90.15° S If the receiving-end voltage is to be 132 kV when supplying a load of 125 MVA 0.9 p.f. lagging, calculate the sending-end voltage and current. (Answer: 165 kV, 498 A) 5. A 500-km, 500-kV, 60-Hz uncompensated three-phase line has a positive-sequence series impedance z = 0.03 + j0.35 N/km and a positive-sequence shunt admittance y = j4.4 x 10-6 S/km. Calculate: a) Zc, b) (yl), c) The exact ABCD parameters for this line. NB cosh(a + jb) = cosha.cosb + sinha. sinb -
Transcribed Image Text:1. A 275 kV three-phase transmission line of length 96 km is rated at 800 A. The values of resistance, inductance and capacitance per phase per kilometre are 0.078 V, 1.056 mH and 0.029 mF, respectively. The receiving-end voltage is 275 kV when full load is transmitted at 0.9 power factor lagging. Calculate the sending-end voltage and current, and the transmission efficiency, and compare with the answer obtained by the short-line representation. Use the nominal pi and T methods of solution. The frequency is 60 Hz. (Answer: V 179 kV per phase) 2. A 220 kV, 60 Hz three-phase transmission line is 320 km long and has the following constants per phase per km: Inductance 0.81 mH Capacitance 12.8 mF Resistance 0.038 V Ignore leakage conductance. If the line delivers a load of 300 A, 0.8 power factor lagging, at a voltage of 220 kV, calculate the sending-end voltage. Determine the p circuit which will represent the line. (Answer: Vs = 241 kV) 3. Calculate the A B C D constants for a 275 kV overhead line of length 83 km. The parameters per kilometre are as follows: Resistance 0.078 2 Reactance 0.33 2 Admittance (shunt capacitative) 9.53 × 10-6 siemens. The shunt conductance is zero. (Answer: [A = 0.98917 + j0.00256; B = 6.474 + j27.39; C = (-1.0126 × 10-6 + j 7.8671 × 10-¹)] 4. A 132 kV, 60 Hz transmission line has the following generalized constants: A = 0.969620.49, B = 52.88274.79 , C = 0.001177/90.15° S If the receiving-end voltage is to be 132 kV when supplying a load of 125 MVA 0.9 p.f. lagging, calculate the sending-end voltage and current. (Answer: 165 kV, 498 A) 5. A 500-km, 500-kV, 60-Hz uncompensated three-phase line has a positive-sequence series impedance z = 0.03 + j0.35 N/km and a positive-sequence shunt admittance y = j4.4 x 10-6 S/km. Calculate: a) Zc, b) (yl), c) The exact ABCD parameters for this line. NB cosh(a + jb) = cosha.cosb + sinha. sinb -
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 4 steps with 4 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Compensation Techniques in Transmission Line
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.
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