Power Systems
A 200 MVA alternator operated at no load at frequency of 50 Hz, it has inertia constant of 5 MWsec/MVA and governing system has a time delay of 0.6 sec. If the load of 50 MW is suddenly applied then find the frequency deviation during this time?

 -0.85 Hz
 0.76 Hz
 0.85 Hz
 -0.76 Hz

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Power Systems
Per unit of any quantity is defined as

 base value of quantity /actual value of quantity in same units
 base value of quantity /actual value of quantity in different units
 actual value of quantity /base value of quantity in same units
 actual value of quantity /base value of quantity in different units

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