Download PTU B.Tech 2021 Jan EE 5th Sem 78309 Power Systems IApparatus And Modelling Question Paper

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Roll No. | HEEE | [ 1] Total No. of Pages : 02

Total No. of Questions : 18

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B.Tech. (Electrical & Electronics)/(Electrical Engineering)/

(Electronics & Electrical) (Sem.=5)

POWER SYSTEMS-I(APPARATUS & MODELLING)

Subject Code : BTEE-501-18

M.Code : 78309

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Time : 3 Hrs. Max. Marks : 60

INSTRUCTION TO CANDIDATES :

1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.

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SECTION-A

Answer briefly :

1. What do you mean by Balanced and Unbalanced faults in Power system?
2. Draw the equivalent circuit of a synchronous machine connected to infinite bus-bar.
3. Compare Conventional and non-conventional energy sources.

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4. Why are transmission lines transposed?
5. Distinguish between a feeder and a distributor.
6. What do you understand by Skin effect?
7. Discuss the applications of distance protection.
8. What do you mean by surge impedance loading?

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9. What do you mean by bulk power grids?
10. Define the voltage regulation in transmission lines.

SECTION-B

11. Derive an expression to determine the voltage regulation of short transmission lines. Draw its phasor diagram also.
12. State the different problems associated with series compensation.

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13. What are the causes of over voltage? Discuss over voltage protection schemes.
14. Find the expression for the capacitance of a single-core cable.
15. Discuss the evolution of power system and present scenario in power systems.

SECTION-C

16. Write a note on the following :
    1. Bewley diagrams

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    2. Synchronous and asynchronous interconnections
17. Discuss various types of Circuit breakers with ratings and applications.
18. 1. Draw and explain power curve of wind turbine.
    2. Explain the concept and phenomenon of corona in power system.

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NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any page of Answer Sheet will lead to UMC against the Student.

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