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GATE 2024 Power Systems Foundation Quiz 34

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Question 1

The nominal-model circuit of transmission line is shown in the figure. Impedance z = 10080°Ω and reactance X = 3000 Ω. The magnitude of characteristic impedance of transmission line is ______(Ω).

Question 2

An interconnected cable link generating stations 1 and 2 is shown in figure.

The total demands at the two buses are:

SD1 = (10 + j5) p.u. and SD2 = (20 + j18) p.u.

The station loads are equalized by the flow of power in the cable. Generator G1 can generate a maximum of 15 p.u. real power, sending end station power factor is________ lagging.

Question 3

In the system shown in figure below:

If the station loads are equalized by the flow of power in cable and generator G1 can generate a maximum of 20 p.u. real power, then the power factor at station 2 is _____ lagging (desired voltage profile is flat).

Question 4

A single circuit 50 Hz, 3-phse transmission line has following parameters per km: R = 0.2 Ω, L = 1.3 mH, C = 0.01 μF. The parameter |A| and |B| of 120 km long line are _______.

Question 5

A 3-phase, 100 km, 50 Hz transmission line has conductors made of copper each having resistance 0.1Ω/km, 1.5 cm outside diameter and space d equilaterally 2 m between centers. Then |AD| is _______.
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Apr 15ESE & GATE EE