Download GTU BE/B.Tech 2019 Winter 4th Sem New 2142404 Basic Power Systems Question Paper

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Subject Code: 2142404

GUJARAT TECHNOLOGICAL UNIVERSITY

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Instructions:

1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

1. (a) Discuss in brief the power generating station. (03)
   

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   (b) List the advantages and disadvantages of Hydro power station. (04)
   (c) Classify Sub-station. Explain comparison between indoor and outdoor substation. (07)
2. (a) Define Corona. List factors affecting Corona. (03)
   (b) List out main components of overhead transmission line with its function. (04)
   (c) Derive the equation of an inductance of a conductor and loop inductance for single-phase two wire line. (07)
   

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   OR
   (c) Explain constants of a Transmission Line in detail. (07)
3. (a) Explain proximity effect in ac supply system. (03)
   (b) Explain end condenser method for medium transmission line. (04)
   (c) State and explain symmetrical components. (07)
   

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   OR
   (c) What do you understand by long transmission line? (07)
4. (a) What is the effect of load power factor on regulation of a transmission line? (03)
   (b) Explain bundled conductors in detail. (04)
   (c) Discuss various methods to improving string efficiency. (07)

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5. (a) Give the classification of DC links, and explain any one in detail. (03)
   (b) Explain the receiving end circle diagram. (04)
   (c) Explain voltage transformer earthing. (07)
   OR
   (c) Explain merits of HVDC transmission system. (07)

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6. (a) Draw the arrangement of main components of HVDC transmission system. Explain it in detail. (03)
   (b) What is transposition? Discuss the importance of transposition in transmission line. (04)
   (c) Define the grounding and explain solid grounding with diagram. (07)
7. (a) What is reactance grounding? What are its advantages and disadvantages? (03)
   (b) Explain the skin effect in brief. (04)
   

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   (c) What is Sag. Derive the equation of sag, when supports are at equal level. (07)
   OR
   (c) Discuss the importance of power factor improvement. Derive the expression of most economical power factor. (07)