EE2303 Transmission and Distribution Question Bank : valliammai.co.in
Name of the College : Valliammai Engineering College
Subject : Transmission and Distribution
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Document Type : Question Bank
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Valliammai Transmission & Distribution Question Paper
SUBJECT CODE/NAME: EE2303-TRANSMISSION & DISTRIBUTION
YEAR / SEM : III / V
UNIT- I
INTRODUCTION
PART-A
1. What is meant by power supply system?
2. What is meant by Transmission and Distribution system?
3. What are the different types of Power supply system?
Related : Valliammai Engineering College MA7169 Advanced Numerical Methods M.E Question Bank : www.pdfquestion.in/2845.html
4. What are the various components of power supply system?
5. What are the different types of power plants?
6. What are the different operating voltages used for generation, primary and secondary transmission in AC power supply systems in India?
7. Define – Feeder, distributor and service mains.
8. List the advantages of high voltage transmission.
9. State Kelvin’s law.
10. What are the limitations of Kelvin’s law?
11. Define – Break-even distance.
12. List the disadvantages of DC transmission.
13. List the different types of DC links.
14. Define – Short Circuit Ratio (SCR)
15. What are the limitations of high voltage transmission?
16. List the various types of distribution systems.
17.List the different types of distribution systems based on connection
18. What are the different components of a distribution system?
20. What are the limitations of HVDC system?
21. List the two merits of HVDC system
22. List the HVDC systems present and which are in operation in India.
23. List the applications of HVDC system.
24. List the advantages of EHVAC transmission system.
25. What is the need of load dispatch centres? Where are the LDC’s available in Tamil Nadu?
PART-B
1. (i)Discuss various types of HVDC links. (8)
(ii)List out the main components of a HVDC system. (8)
2.(i) Draw and explain the structure of modern power systems with typical voltage levels. (13)
(ii)What is the highest voltage level available in India? (3)
3. (i).Explain the effect of high voltage on volume of copper and on efficiency. (8)
(ii) Explain why the transmission lines are 3 phase 3-wire circuits while distribution lines are 3 phase 4-wire circuits. (8)
4. (i) Draw the model power system with single line representation. Show its essential constituent sections. (6)
(ii) What are the AC transmission and distribution level voltages we have in India? (4)
(iii) What are the different kinds of DC links? Draw relevant diagrams. (6)
5. (i)Explain why EHV transmission is preferred? What are the problems involved in EHV AC transmission? (8)
(ii) With neat schematic, explain the principle of HVDC system operation. (8)
6. Explain about FACTS with neat diagram (16)
7. Explain TCSC and SVS systems (16)
8. Explain with neat diagram about STATCOM and UPFC (16)
9. (i) Compare EHVAC and HVDC transmission (8)
(ii) Explain the applications of HVDC transmission system (8)
10.Derive expressions for sag and tension in a power conductor strung between two supports at equal heights taking into account the wind and ice loadings also.
11. (b) A transmission line conductor at a river crossing is supported from two towers at a height of 50 and 80 metres above water level. The horizontal distance between the towers is 300 metres. If the tension in the conductor is 2000 kg, find the clearance between the conductor and water at a point midway between the towers. Weight of conductor per metre = 0.844 kg. Derive the formula used.
UNIT- II
TRANSMISSION LINE PARAMETERS
PART-A
1. Define Skin effect.
2. What is meant by proximity effect?
3. List out the advantages of double circuit lines.
4. Define – Self GMD (GMR) and mutual – G.M.D.
5. What is meant by inductive interference?
6. What is transposition of conductors?
7. State why transposition of line conductors are needed?
8. List the advantages of bundled conductors.
9. What are the factors that affect the skin effect?
10. Why the effective resistance is more than the static resistance of a transmission line?
11. Why does a transmission lines have resistance, inductance, and capacitance?
12. List the factors that governing the capacitance of a transmission line.
13. What is ACSR conductor?
14. What is fictitious conductor radius?
15. State the advantages of double circuit line over single circuit line.
16. Define unsymmetrical spacing.
17.Define symmetrical spacing.
18. Define capacitor.
19.What do you understand by inductive interference?
PART-B
1. From the fundamentals derive an expression for inductance of a single phase transmission system. (16)
2. Derive an expression for capacitances of a single phase transmission system and discuss the effect of earth on capacitance with suitable equation. (16)
3. (i) Derive an expression for inductance of a single-phase overhead line. (8)
(ii) A conductor is composed of seven identical copper strands each having a radius r. Find the self-GMD of the conductor. (8)
4. i) Derive an expression for the capacitance between conductors of a single phase overhead line. (8)
ii) Find the capacitance between the conductors of a single-phase 10 km long line. The diameter of each conductor is 1.213cm. The spacing between conductors is 1.25m. Also find the capacitance of each conductor neutral. (8)
5. i) Derive the expression for inductance of a two wire 1F transmission line (8)
ii) Derive the expression for capacitance of a 1F transmission line (8)
6. i)What are the advantages of bundled conductors? (4)
ii) Derive the expression for capacitance of a double circuit line for hexagonal spacing. (8)
iii) Why is the concept of self GMD is not applicable for capacitance? (4)
7. i) Explain clearly the skin effect and the proximity effects when referred to overhead lines. (8)
ii) Write a short note on the inductive interference between power and communication lines. (8)
8. i) Derive the expression for the capacitance per phase of the 3 F double circuit line flat vertical spacing with transposition. (8)
ii) A 3 F overhead transmission line has its conductors arranged at the corners of an equilateral triangle of 2m side. Calculate the capacitance of each line conductor per km. Given the diameter of each conductor is 1.25cm. (8)
Find the capacitance between the conductors of a single-phase 10 km long line. The diameter of each conductor is 1.213cm. The spacing between conductors is 1.25m. Also find the capacitance of each conductor neutral. (8)