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GATE 2022: Power System-43 (App update required to attempt this test)

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Question 1

In case of a three phase AC circuit. What will be the sum of all three generated voltages?

Question 2

The capacitance of 3-core cable between any conductors with sheath earthed equals to 9μF. The capacitance per phase will be

Question 3

A three phase, 100 MVA ,121KV synchronous generator with a solidly grounded neutral point supplies a feeder. The sequence impedances of generator and feeder are given below

A fault from one phase to ground occurs at the far end of the feeder. Find the value of fault current  (in kA)?

Question 4

An alternator with internal voltage of 1δ1 p.u. and synchronous reactance of 0.4 p.u. is connected by a transmission line of reactance 0.1 p.u. to a synchronous motor having synchronous reactance 0.35 p.u. and internal voltage of 0.85δ2 p.u. If the real power supplied by the alternator is 0.866 p.u., then (δ1 — δ2) is ________ degrees. (Round off to 2 decimal places.) (Machines are of non-salient type. Neglect resistances.)

Question 5

The transmission line having a diameter of 4 cm and μr= 6 produces an internal inductance 0.12 μH/m. If it is replaced by an ASCR conductor which has a same diameter size but μr = 10, what will be the new internal inductance (μH/m)?

Question 6

A 500 kV, 2 μsec rectangular surge impedance of 350 Ω approaches a station at which the concentration earth capacitance is 3000 PF determine the maximum value of the transmitted wave

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Jun 12ESE & GATE EE