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AE 2019 || Day 15 || Power Systems Quiz 3

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Question 1

What is the form of the Y_bus matrix for carrying out load flow studies by Gauss-Seodal method of a power system having mesh connection of nodes?

Question 2

Consider the following statements:

1) Equivalent-T circuit of a long line is preferred to equivalent-p circuit.
2) The nature of reactive power compensation is different for peak load and off-peak load conditions.
3) Ferranti effect is significant only on medium and long lines.

Which of these statements are correct?

Question 3

The steady state stability limits for round rotor and salient pole 3-phase synchronous generator are attained at the values of power angle

Question 4

In a 3-phase, 5 kV, 5 MVA system, what is the base impedance?

Question 5

If a line of surge impedance Z₀ is terminated in an impedance Z then the reflection for current and voltage surges at the termination are given respectively by

Question 6

One what basis is the insulation level of a 400 kV. EHV overhead transmission line decided?

Question 7

Which of the following circuit breakers has the lowest voltage range?

Question 8

Which is the main relay for protecting up to 90% of the transmission line-length in the forward direction?

Question 9

A Buchholz relay is used for:

Question 10

A power system network having 200 buses out of which there are 15 fixed shunt capacitor buses and 30 generator buses then the size of the Jacobian matrix is –

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ESE & GATE EE General

Feb 18ESE & GATE EE