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UPPCL AE EE : Power Systems Quiz 4

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Question 1

To increase the steady state stability limit of power transfer we use parallel transmission lines. using parallel transmission lines –

Question 2

The critical clearing time is related to

Question 3

A transmission line with sending end and receiving end voltages as |V_s|∠δ and |V_R|∠0. If line reactance is capacitive in nature. What are the limits on δ to make system stable?

Question 4

Steady state stability limit of an alternator connected to an infinite bus is independent of the following:

Question 5

Assuming δ to be in electrical degrees, the swing equation is given by the expression:

Question 6

Consider a 100 MVA, 60 Hz synchronous generator. Its inertia constant is 4 MJ/MVA. Inertia constant in MJ-sec/elec-deg will be____.

Question 7

For which of the following cases the equal area criterion & swing equation can be used?

Question 8

Synchronizing power coefficient for P_max = 2 and operating δ = 30° is ________.

Question 9

A 50 Hz, four-pole turbogenerator rated at 30 MVA, 13.2 kV has an inertia constant of H = 9.0 kW-sec/kVA . What is the KE stored in the rotor at synchronous speed?

Question 10

By introducing which of the following the transient stability limit of the power system can be increased?

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