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GATE EE 2021 : Power System Quiz 5 (App update required to attempt this test)

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Question 1

A single-phase 2-wire line consists of two conductors having GMR 1.5 cm and 2.2 cm. The distance between their centres is 1 m. Determine the total inductance of the system [mH/km].

Question 2

Which of the following is the line which is operation below 34.5 KV?

Question 3

In a 3-phase line operating at 50 Hz, the conductors, each of diameter 0.96 cm, are arranged as given below.

Determine the inductance of the line.

Question 4

A long transmission line has R = 6 Ω, G = 240 mS L = 2 H and C = 80 mF is operating at 50 Hz, 400 kV. If this line is terminated with 5 Ω, the voltage across the load as ______ kV.

Question 5

ABCD parameters of 3 φ transmission line are A = D = 0.92.5 °, B = 15081 °Ω and C = 0.0592.6 °S. If the sending end voltage is 450 kV, then the receiving end voltage under no load condition is _______ kV.

Question 6

A generator with constant 1.0 p.u. terminal voltage supplies power through a step-up transformer of 0.12 p.u. reactance and a double-circuit line to an infinite bus bas as shown in the following figure. The infinite bus voltage is maintained at 1.0 p.u.Neglecting the resistances and susceptances of the system, the steady statestability power limit of the system is 6.25 p.u. If one of the double-circuit istripped, the resulting steady state stability power limit in p.u. will be
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Feb 11ESE & GATE EE