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Reg No.: Name:
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
Fifth Semester B.Tech Degree Regular and Supplementary Examination December 2020

Course Code: EE301
Course Name: POWER GENERATION, TRANSMISSION AND PROTECTION

Max. Marks: 100 Duration: 3 Hours
PARTA
Answer all questions, each carries5 marks. Marks
1 With neat sketch explain the working of a nuclear power station. (5)
2 A long transmission line when lightly loaded causes the receiving end voltage (5)

to exceed the sending end voltage. Justify with neat phasor diagram.

3 Obtain the most economical size of conductor according 10 Kelvin’s law. Also (5)
list any 4 limitations of Kelvin’s law.

4 Explain the construction of underground cables with neat figure. (5)

Illustrate the significance of dividing the power system into various protection (5)

zones.
6 Differentiate between breaking capacity and making capacity with necessary (5)
equations.
7 Explain stator inter-turn protection method of alternator. (5)
8 With necessary figures explain the actions performed by a lightning arrester. (5)
PART B
Answer any two full questions, each carries 10 marks.
9 A power station has to meet the following demand: (10)

Group A: 300 kW between 8 AM and 6 PM
Group B: 200 kW between 6AM and 10 AM
Group C: 50 kW between 6 AM and 10 AM
Group D: 100 kW between 10 AM and 6 PM and then between 6 PM and 6
AM. Plot daily load curve and determine (i) Diversity factor (ii) Units
generated per day (iii) Load factor
10 a) Explain the significance of transposition in transmission lines. (4)
b) Find the inductance per phase per km of double circuit three phase line shown (6)

in figure. The conductors are transposed and are of radius 0.9cm each. The

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