THESE QUESTIONS ARE FROM THE SUBJECT POWER SYSTEM FUNDAMENTALS 14. Explain the following terms with reference...
THESE QUESTIONS ARE FROM THE SUBJECT POWER SYSTEM FUNDAMENTALS
14. Explain the following terms with reference to corona : (i) Critical disruptive voltage (ii) Visual critical voltage (iii) Power loss due to corona
15. Describe the various methods for reducing corona effect in an overhead transmission line.
16. What is a sag in overhead lines ? Discuss the disadvantages of providing too small or too large sag on a line.
17. Deduce an approximate expression for sag in overhead lines when (i) supports are at equal levels (ii) supports are at unequal levels.
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THESE QUESTIONS ARE FROM THE SUBJECT POWER SYSTEM
FUNDAMENTALS
14. Explain the following terms with reference...
THESE QUESTIONS ARE FROM THE SUBJECT POWER SYSTEM FUNDAMENTALS 1. Name the important components of an...
THESE QUESTIONS ARE FROM THE SUBJECT POWER SYSTEM FUNDAMENTALS 1. Name the important components of an overhead transmission line. 2. Discuss the various conductor materials used for overhead lines. What are their relative advantages and disadvantages ? 3. Discuss the various types of line supports. 4. Why are insulators used with overhead lines ? Discuss the desirable properties of insulators. 5. Discuss the advantages and disadvantages of (i) pin-type insulators (ii) suspension type insulators. 6. Explain how the electrical breakdown...
THESE QUESTIONS ARE FROM THE SUBJECT POWER SYSTEM FUNDAMENTALS 9. Define and explain string efficiency. Can...
THESE QUESTIONS ARE FROM THE SUBJECT POWER SYSTEM FUNDAMENTALS 9. Define and explain string efficiency. Can its value be equal to 100% ? 10. Show that in a string of suspension insulators, the disc nearest to the conductor has the highest voltage across it. 11. Explain various methods of improving string efficiency. 12. What is corona? What are the factors which affect corona ? 13. Discuss the advantages and disadvantages of corona.
THESE ARE QUESTIONS FROM THE SUBJECT POWER SYSTEM FUNDAMENTALS 9. What do you understand by generalised...
THESE ARE QUESTIONS FROM THE SUBJECT POWER SYSTEM FUNDAMENTALS 9. What do you understand by generalised circuit constants of a transmission line ? What is their importance? 10. Evaluate the generalised circuit constants for (i) short transmission line (ii) medium line — nominal T method (iii) medium line — nominal π method
THESE ARE THE QUESTIONS FROM THE SUBJECT POWER SYSTEM FUNDAMENTALS AND THE CHAPTER IS MECHANICAL DESIGN...
THESE ARE THE QUESTIONS FROM THE SUBJECT POWER SYSTEM FUNDAMENTALS AND THE CHAPTER IS MECHANICAL DESIGN OF TRANSMISSION LINES . THE ANSWERS ARE GIVEN WITH THE QUESTION PLEASE DO ALL THE QUESTIONS PROPERLY ..DONOT SKIP ANY STEP AND DO YOUR BEST 5. A string of 4 insulators has self-capacitance equal to 4 times the pin-to-earth capacitance. Calculate (i) the voltage distribution across various units as a percentage of total voltage across the string and (ii) string efficiency. [(i) 14·5%, 18·1%,...
THESE QUESTIONS ARE FROM THE SUBJECT POWER SYSTEM FUNDAMENTALS AND THE CHAPTER IS DESIGNING OF OVER...
THESE QUESTIONS ARE FROM THE SUBJECT POWER SYSTEM FUNDAMENTALS AND THE CHAPTER IS DESIGNING OF OVER HEAD TRANSMISSION LINES KINDLY DO ALL QUESTIONS TOMMOROW IS MY FINAL PLEASE DO YOUR BEST 4. A 20 km single phase line has two parallel conductors separated by 1·5 metres. The diameter of each conductor is 0·823 cm. If the conductor has a resistance of 0·311 Ω/km, find the loop impedance of this line at 50 Hz. [19·86 Ω ] 5. The three conductors...
THESE ARE QUESTION FROM THE TOPIC POWER FACTOR IMPROVEMENT FROM THE SUBJECT POWER SYSTEM FUNDAMENTALS PLEASE...
THESE ARE QUESTION FROM THE TOPIC POWER FACTOR IMPROVEMENT FROM THE SUBJECT POWER SYSTEM FUNDAMENTALS PLEASE DO THE QUESTIONS STEP BY STEP AND IN NEAT HAND WRITTING THE ANSWERS ARE GIVEN WITH THE QUESTIONS 1) . A 3-phase, 400 V synchronous motor having a power consumption of 50 kW is connected in parallel with an induction motor which takes 200 kW at a power factor of 0·8 lagging. (i) Calculate the current drawn from the mains when the power...
Explain the following related to AC-DC power transmission: (i) Need of HVDC power Transmission system (any...
Explain the following related to AC-DC power transmission: (i) Need of HVDC power Transmission system (any four points ) (ii) Draw and explain block diagram of conversion of HVDC—LVAC—Load. (iii) Name any two HVDC lines in world with voltage ranges and distance .
Solve all questions and submit through blackboard by March 26, 2020 Q. 1 (i) Classify short,...
Solve all questions and submit through blackboard by March 26, 2020 Q. 1 (i) Classify short, medium and long transmission lines based on distance (km). (ii) Classify transmission lines (low, medium, high, extra high) based on voltage levels (kV). (iii) What is commonly used conductor material for overhead transmission lines. Why Aluminum and copper materials are not used for conductors of transmission lines. Q. 2: A 3-phase, 230 kV transmission line having a length of 50 km is composed of...
Figure 1 Single line diagram b2 b3 b1 b4 grid Τι 13 A power system single line diagram is shown...
Figure 1 Single line diagram b2 b3 b1 b4 grid Τι 13 A power system single line diagram is shown in Figure 1. The single line diagram shows a synchronous generator G connected to a large 50 Hz grid via its unit transformer T and a network of three transmission lines. Relevant details of the grid, transformer, generator and overhead lines are provided in Tables I,II,II & IV respectively. A double line to ground fault occurs at bus 3 Questions....
Solve all questions and submit through blackboard by March 26, 2020 Q. 1 (i) Classify short, medium and long transmission lines based on distance (km). (ii) Classify transmission lines (low, medium, high, extra high) based on voltage levels (kV). (iii) What is commonly used conductor material for overhead transmission lines. Why Aluminum and copper materials are not used for conductors of transmission lines. Q. 2: A 3-phase, 230 kV transmission line having a length of 50 km is composed of...
Figure 1 Single line diagram b2 b3 b1 b4 grid Τι 13 A power system single line diagram is shown in Figure 1. The single line diagram shows a synchronous generator G connected to a large 50 Hz grid via its unit transformer T and a network of three transmission lines. Relevant details of the grid, transformer, generator and overhead lines are provided in Tables I,II,II & IV respectively. A double line to ground fault occurs at bus 3 Questions....
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