A lossless power system has to serve a load of 250 MW. There are two generators(G1 and G2) in the system with cost curves C1 and C2 respectively defined as follows: C1 = PG1+0.055P²G1 C2 = 3 PG2 + 0.03 P²G2 Where PG1 and PG2 are the MW injections from generators G1 and G2 respectively. Thus, the minimum cost dispatch will be

Power Systems
A lossless power system has to serve a load of 250 MW. There are two generators(G1 and G2) in the system with cost curves C1 and C2 respectively defined as follows: C1 = PG1+0.055P²G1 C2 = 3 PG2 + 0.03 P²G2 Where PG1 and PG2 are the MW injections from generators G1 and G2 respectively. Thus, the minimum cost dispatch will be

PG1 = 100 MW and PG2 = 150 MW

PG1 = 250 MW and PG2 = 0 MW

PG1 = 0 MW and PG2 = 250 MW

PG1 = 150 MW and PG2 = 100 MW

PG1 = 100 MW and PG2 = 150 MW

PG1 = 250 MW and PG2 = 0 MW

PG1 = 0 MW and PG2 = 250 MW

PG1 = 150 MW and PG2 = 100 MW

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Power Systems
An impulse turbine

is most suited for low head and high discharge power plants.

operates by initial complete conversion to kinetic energy.

always operates submerged.

makes use of a draft tube.

is most suited for low head and high discharge power plants.

operates by initial complete conversion to kinetic energy.

always operates submerged.

makes use of a draft tube.

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

DC shunt motor

Three phase induction motor

Three phase synchronous motor

DC series motor

DC shunt motor

Three phase induction motor

Three phase synchronous motor

DC series motor

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Power Systems
The line currents of 3-phase supply are: IR = 3 + j 5 A IY =2 + j 2 A IB = -2 - j 1 A The zero sequence current will be

1 + j 4 A

5 + j 7 A

1 + j 2 A

-2 - j 1 A

1 + j 4 A

5 + j 7 A

1 + j 2 A

-2 - j 1 A

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Power Systems
Under over excitation synchronous phase modifier works as

series capacitor

shunt capacitor

any of the above

shunt reactor

series capacitor

shunt capacitor

any of the above

shunt reactor

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Power Systems
The power output of a nuclear power station is proportional to

square of the rate at which fission reaction occurs.

square root of the rate at which fission reaction occurs.

the rate at which fission reaction occurs.

none of above.

square of the rate at which fission reaction occurs.

square root of the rate at which fission reaction occurs.

the rate at which fission reaction occurs.

none of above.

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Power Systems

Power Systems An impulse turbine

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

Power Systems The line currents of 3-phase supply are: IR = 3 + j 5 A IY =2 + j 2 A IB = -2 - j 1 A The zero sequence current will be

Power Systems Under over excitation synchronous phase modifier works as

Power Systems The power output of a nuclear power station is proportional to

Power Systems
An impulse turbine

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

Power Systems
The line currents of 3-phase supply are: IR = 3 + j 5 A IY =2 + j 2 A IB = -2 - j 1 A The zero sequence current will be

Power Systems
Under over excitation synchronous phase modifier works as

Power Systems
The power output of a nuclear power station is proportional to