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GATE 2024 Power Systems Foundation Quiz 43

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Question 1

The faults on power systems are analyzed easily by making use of

Question 2

A 25 MVA, 13.2 kV alternator with solidly grounded neutral has a sub-transient reactance of 0.25 p.u. the negative and zero sequence reactance’s are 0.35 and 0.1 p.u respectively A double line to ground fault occur at terminal of alternator, then fault current is _________.

Question 3

The positive sequence impedance component of three unequal impedances Za, Zb and Zc is

Question 4

The bus impedance matrix of a power system is given by

Pre fault voltage at each bus is 100 V

If A 3 phase fault occur at Bus 2. Find the voltage at BUS 3.

Question 5

A balanced 3-phase load is supplied from a 3- phase supply. The contact in line c of the triple-pole switch contactor fails to connect when switched on. If the line-currents in lines a and b record 25A each, then the positive-sequence component of the current is

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Apr 24ESE & GATE EE