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?

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

0.76 Hz

0.85 Hz

-0.85 Hz

-0.76 Hz

0.76 Hz

0.85 Hz

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Power Systems
In order to have lower cost of power generaion

the load factor should be high but diversity factor should be low

The load factor and diversity factor should be high

the load factor should be low but diversity factor should be high

the load factor and diversity factor should be low

the load factor should be high but diversity factor should be low

The load factor and diversity factor should be high

the load factor should be low but diversity factor should be high

the load factor and diversity factor should be low

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Power Systems
On which one of the following cycles does a modern steam power plant work?

Carnot cycle

Bell-Coleman cycle

Otto cycle

Rankine cycle

Carnot cycle

Bell-Coleman cycle

Otto cycle

Rankine cycle

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Power Systems
The per unit impedance of a circuit element is 0.30. If the base kV and base MVA are halved, then the new value of the per unit impedance of the circuit element will be

0.60

0.0030

0.0060

0.30

0.60

0.0030

0.0060

0.30

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Power Systems
A transmission line has a reactance of 1 Pu is operating at Vs = Vr = 1 Pu. The generator is connected at source end which is delivering 0.5 Pu of active power and the transmission line is compensated with a series capacitance of 0.5 Pu. Find the load angle with series capacitance compensation ?

29°

14.5°

35.5°

10.5°

29°

14.5°

35.5°

10.5°

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Power Systems
The maximum efficiency of modern coal fired steam steam raising thermal power plants is restricted to about 0.35( a low value), mainly because of

low alternator efficiency

high energy loss in condenser

low steam turbine mechanical efficiency

high energy loss in boilers

low alternator efficiency

high energy loss in condenser

low steam turbine mechanical efficiency

high energy loss in boilers

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Power Systems

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?

Power Systems In order to have lower cost of power generaion

Power Systems On which one of the following cycles does a modern steam power plant work?

Power Systems The per unit impedance of a circuit element is 0.30. If the base kV and base MVA are halved, then the new value of the per unit impedance of the circuit element will be

Power Systems The maximum efficiency of modern coal fired steam steam raising thermal power plants is restricted to about 0.35( a low value), mainly because of

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?

Power Systems
In order to have lower cost of power generaion

Power Systems
On which one of the following cycles does a modern steam power plant work?

Power Systems
The per unit impedance of a circuit element is 0.30. If the base kV and base MVA are halved, then the new value of the per unit impedance of the circuit element will be

Power Systems
The maximum efficiency of modern coal fired steam steam raising thermal power plants is restricted to about 0.35( a low value), mainly because of