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Power Systems

Power Systems
The value of inductance used for compensation of arcing grounds is

 1/3ω²C
 3ω²C
 ω²C/3
 3/ω²C

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Power Systems
Three generators rated 100 MVA, 11 kV have an impedance of 0.15 pu each. If in the same plant, these generators are being replaced by a single equivalent generator, the effective impedance of equivalent generator will be

 0.15 pu
 0.05 pu
 0.25 pu
 0.45 pu

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Power Systems
The equation of area control error(ACE) is

 ACE = ΔPtie +1/ b.Δf
 ACE = ΔPtie - b.Δf
 ACE = ΔPtie + b.Δf
 ACE = ΔPtie - 1/b.Δf

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Power Systems
If the frequency is increased, then skin effect will

 any of the above
 increases
 decreases
 remains unaffected

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Power Systems
Characteristics of arc quenching medium is/are

All of these
 Non flammable
 High dielectric strength
 High thermal conductivity

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

 500 ohms
 50 ohms
 0.5 ohm
 5 ohms

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