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Power Systems

Power Systems
For load flow studies, What are the quantities specified at load bus are

 V and δ
 P and V
 P and Q
 δ and Q

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

 200 MJ
 400 MJ
 50 MJ
 8 MJ

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Power Systems
A transmission line is operating under no load has ABCD parameters B = 100∠90° has a phase shift of 0.2 rad, how much shunt reactor is required for compensation of ferranti effect?

 2 H
 15.9 H
 2 mH
 15.9 mH

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Power Systems
The per unit impedance Z(pu) is given by

 ZΩ* (kVA)b/(KV)²b
 ZΩ* (MVA)b*100/(KV)²b
 ZΩ* (MVA)b/(KV)²b
 ZΩ* (MVA)b/((KV)²b *100)

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Power Systems
Keeping in view the cost and overall effectiveness, the following circuit breaker is best suited for capacitor bank switching?

 Oil CB.
  Vacuum CB.
 Air blast CB.
 SF6 CB.

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Power Systems
In a power system with negligible resistance, the fault current at a point is 8.00 pu. The series reactance is to be included at the fault point to limit the short circuit. current to 5.00 pu is

 0.075 pu.
 0.200 pu.
 0.125 pu.
  3.000 pu.

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