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POWER SYSTEMS

Power Systems
If a 500 MVA, 11 kV 3-phase generator at 50 Hz feeds through a transfer impedance of (0+j0.605) Ω/phase, an infinite voltage also at 11 kV, then the maximum steady state power transfer on the base of 500 MVA and 11 kV is

 0.8 pu
 1 pu
 0.5 pu
 0.4 pu

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Power Systems
For 800 MJ stored energy in the rotor at synchronous speed, what is the inertia constant H for a 50 Hz, four pole turbo generator rated 100 MVA, 11 kV?

 4 MJ/MVA
 2 MJ/MVA
 6 MJ/MVA
 8 MJ/MVA

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Power Systems
For which one of the following types of motors, is the equal area criterion for stability applicable?

 DC series motor
 DC shunt motor
 Three phase induction motor
 Three phase synchronous motor

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Power Systems
An alternator having an induced emf of 1.6 pu is connected to an infinite bus of 1 pu. If the bus bar has reactance of 0.6 pu and alternator has reactance of 0.2 pu, what is the maximum power that can be transferred?

 6 pu
 5 pu
 2 pu
 2.67 pu

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Power Systems
If the inertia constant H = 8 MJ/MVA for a 50 MVA generator, the stored energy is

 8 MJ
 50 MJ
 200 MJ
 400 MJ

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