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 QUESTIONS FROM THE SUBJECT POWER SYSTEM FUNDAMENTALS 9. What do you understand by generalised...
THESE ARE THE QUESTIONS FROM THE SUBJECT POWER SYSTEM FUNDAMENTALS 1. What is the purpose of an overhead transmission line ? How are these lines classified ? 2. Discuss the terms voltage regulation and transmission efficiency as applied to transmission line. 3. Deduce an expression for voltage regulation of a short transmission line, giving the vector diagram. 4. What is the effect of load power factor on regulation and efficiency of a transmission line ? 5. What do you understand...
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...
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 3). A transmission line has a span of 150 m between level supports. The cross-sectional area of the conductor is 1·25 cm2 and weighs 100 kg per 100 m. The breaking stress is 4220 kg/cm2. Calculate the factor of...
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 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 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...
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 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.
Assume that you are a Power System Design Engineer working for a Power Utility Company You are tasked with providing detailed engineering design and calculations for a transmission line project to deliver power to a remote mining facility. The preliminary studies have suggested that a single circuit transposed HV transmission line with the rated voltae ofrd and the length of-line 1s a feasible solution for this power transmission project. The schematic diagram of the proposed project is illustrated in Figure...
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...