A 03000EE301092001 Pages: 3

Reg No.: Name:
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
B.Tech 55 (5) Examination September 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 Explain the general arrangement and operation of a hydro electric power plant. (5)
2 The receiving end voltage of an unloaded long line may be more than the (5)

sending end voltage. Explain this phenomenon with the help of a phasor

diagram.
3 Explain Kelvin’s law. What are its limitations? (5)
4 Describe the phenomenon of corona. Explain any three factors which affect (5)

corona loss.

5 Explain the arc quenching theorems in a circuit breaker. (5)
6 Explain the fundamental requirements of protective relaying. (5)
7 Differentiate between surge diverter and surge absorber. What are the (5)

characteristics of an ideal surge diverter.

8 Explain briefly various systems of primary distribution in the case of ac. (5)

PART B
Answer any two full questions, each carries 10 marks.
9 a) Define the term Diversity factor and prove that the load factor of a supply (5)

system is improved by an increase in diversity of load.
b) Find the sending end voltage and voltage regulation of a 250 km, 3 phase, 50 (5)
Hz transmission line delivering 25 MVA at 0.8 pf lag to a balanced load at 132
kV. The inductance of the line is 1.25mH/km/ph and the shunt capacitance is
0.0095 uw F/km/ph. Use nominal 7 method.
10 a) From first principles, derive the equation for the loop inductance of a single (5)
phase over head line.

b) A synchronous motor improves the power factor of a load of 250 kW from 0.75 (5)

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