1. A (medium) single phase transmission line 100 km long has the following constants : = 0-152 = 0-377 N Resistance/km/phase Inductive reactance/km/phase Capacitive reactance/km/phase = 31-87 Q = 132 kV Receiving end line voltage Assuming that the total capacitance of the line is localised at the receiving end alone, determine (i) sending end current (iii) regulation The line is delivering 72 MW at 0-8 p.f. lagging. (ii) line value of sending end voltage (iv) sending end power factor IG) 377.3 A GA 155-7 kV Gi) 17.00/ Gv) 07

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...
icon
Related questions
icon
Concept explainers
Question
TUTORIAL PROBLEMS
1. A (medium) single phase transmission line 100 km long has the following constants :
Resistance/km/phase
= 0·15Q
Inductive reactance/km/phase
= 0:377 Q
Capacitive reactance/km/phase
31-87 N
= 132 kV
Receiving end line voltage
Assuming that the total capacitance of the line is localised at the receiving end alone, determine :
(i) sending end current
(ii) line value of sending end voltage
(iii) regulation
(iv) sending end power factor
The line is delivering 72 MW at 0-8 p.f. lagging.
[(i) 377-3 A (ii) 155-7 kV (iii) 17-9% (iv) 0-774 lag]
2. A 3-phase, 50 Hz overhead transmission line has the following constants :
Resistance/phase
= 9.6 Q
Inductance/phase
0-097 mH
Capacitance/phase
0-765 µF
If the line is supplying a balanced load of 24,000 kVA 0-8 p.f. lagging at 66 kV, calculate :
(i) sending end current
(ii) line value of sending end voltage
(iii) sending end power factor
(iv) percentage regulation
(v) transmission efficiency
[(i) 204 A (ii) 75 kV (iii) 0-814 lag (iv) 13•63 % (v) 93-7%]
3. A 3-phase, 50 Hz, overhead transmission line delivers 10 MW at 0-8 p.f. lagging and at 66 kV. The
resistance and inductive reactance of the line per phase are 10 Q and 202 respectively while capacitance
admittance is 4 × 10¯* siemen. Calculate :
(ii) sending end voltage (line-to-line)
(iv) transmission efficiency
(i) the sending end current
(iii) sending end power factor
Use nominal T method.
[(i) 100 A (ii) 69-8 kV (iii) 0-852 (iv) 97-5%]
4. A 3-phase, 50 Hz, 100 km transmission line has the following constants ;
Resistance/phase/km = 0-1 Q
Reactance/phase/km = 0:5 Q
Susceptance/phase/km = 10³ siemen
If the line supplies a load of 20 MW at 0-9 p.f. lagging at 66 kV at the receiving end, calculate by using
nominal t method :
(i) sending end current
(ii) line value of sending end voltage
Transcribed Image Text:TUTORIAL PROBLEMS 1. A (medium) single phase transmission line 100 km long has the following constants : Resistance/km/phase = 0·15Q Inductive reactance/km/phase = 0:377 Q Capacitive reactance/km/phase 31-87 N = 132 kV Receiving end line voltage Assuming that the total capacitance of the line is localised at the receiving end alone, determine : (i) sending end current (ii) line value of sending end voltage (iii) regulation (iv) sending end power factor The line is delivering 72 MW at 0-8 p.f. lagging. [(i) 377-3 A (ii) 155-7 kV (iii) 17-9% (iv) 0-774 lag] 2. A 3-phase, 50 Hz overhead transmission line has the following constants : Resistance/phase = 9.6 Q Inductance/phase 0-097 mH Capacitance/phase 0-765 µF If the line is supplying a balanced load of 24,000 kVA 0-8 p.f. lagging at 66 kV, calculate : (i) sending end current (ii) line value of sending end voltage (iii) sending end power factor (iv) percentage regulation (v) transmission efficiency [(i) 204 A (ii) 75 kV (iii) 0-814 lag (iv) 13•63 % (v) 93-7%] 3. A 3-phase, 50 Hz, overhead transmission line delivers 10 MW at 0-8 p.f. lagging and at 66 kV. The resistance and inductive reactance of the line per phase are 10 Q and 202 respectively while capacitance admittance is 4 × 10¯* siemen. Calculate : (ii) sending end voltage (line-to-line) (iv) transmission efficiency (i) the sending end current (iii) sending end power factor Use nominal T method. [(i) 100 A (ii) 69-8 kV (iii) 0-852 (iv) 97-5%] 4. A 3-phase, 50 Hz, 100 km transmission line has the following constants ; Resistance/phase/km = 0-1 Q Reactance/phase/km = 0:5 Q Susceptance/phase/km = 10³ siemen If the line supplies a load of 20 MW at 0-9 p.f. lagging at 66 kV at the receiving end, calculate by using nominal t method : (i) sending end current (ii) line value of sending end voltage
Expert Solution
steps

Step by step

Solved in 3 steps with 5 images

Blurred answer
Knowledge Booster
Transmission line parameter
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
  • SEE MORE 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,