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Power Systems

Power Systems
The corona loss on a particular system at 60 Hz is 1 kW/km per phase. What is the corona loss at 50 Hz in kW/km per phase?

 1
 1.13
 0.882
 0.93

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Power Systems
Critical visual voltage is the voltage at which

None of these
 corona is just initiated
 corona is visible with blue or violet colour
 both 1 and 2

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Power Systems
In a 4*4 Y bus matrix the number of non zero elements are 12. Find the sparsity of the system?

 0.25
 1
 0.5
 0.75

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Power Systems
The ABCD constants of a 3-phase transmission line are A = D = 0.8∠1°, B = 170∠85° Ω , C = 0.002∠90.4° â„§. The sending end voltage is 400 kV. The receiving end voltage under no load condition is

 350 kV
 400 kV
 500 kV
 600 kV

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Power Systems
The zero sequence current of a generator for line to ground fault is j3 pu. Then the current through the neutral during the fault is

 j3 pu
 j1 pu
 j6 pu
 j9 pu

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Power Systems
A transmission line has surge impedance of 400 Ω, operating at Vs = Vr = 400 kV line is compensated with a shunt capacitance of 30%. Find the surge impedance loading with compensation?

 478 MW
 386 MW
 456 MW
 400 MW

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