Power Systems A 100 MVA alternator operating at full load at 50 Hz. H = 4 MWsec/MVA, Td = 0.5 sec. One of the transmission line is tripped. So that output of generator is reduced to 70 MW. Find the frequency deviation during this time? 0.56 -0.56 -0.92 0.92 0.56 -0.56 -0.92 0.92 ANSWER DOWNLOAD EXAMIANS APP
Power Systems The surge impedance of a 400 km long overhead transmission line is 420 Ω. For a 200 km length of the same line, the surge impedance will be 420 Ω 840 Ω 210 Ω 400 Ω 420 Ω 840 Ω 210 Ω 400 Ω ANSWER DOWNLOAD EXAMIANS APP
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 0.0030 0.0060 0.60 0.30 0.0030 0.0060 0.60 0.30 ANSWER DOWNLOAD EXAMIANS APP
Power Systems Gas turbine power plants for maximum efficient may have All of above. Multistage compression. Heat exchangers. Reheating. All of above. Multistage compression. Heat exchangers. Reheating. ANSWER DOWNLOAD EXAMIANS APP
Power Systems A power system consists of 300 buses out of which 20 buses are generator buses, 25 buses are the ones with reactive power support buses and 15 buses are ones with fixed shunt capacitors. All the other buses are load buses. It is proposed to perform a load flow analysis for the system using Newton-Raphson Jacobian matrix is 553×553 555×555 540×540 554×554 553×553 555×555 540×540 554×554 ANSWER DOWNLOAD EXAMIANS APP
Power Systems Ferranti effect occurs under no load any of the above full load half load no load any of the above full load half load ANSWER DOWNLOAD EXAMIANS APP
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