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Power Systems

Power Systems
Ferranti effect occurs under

 no load
 full load
 half load
 any of the above

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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%. The line is connected to a generator delivering 200 MW. Find the load angle with out and with compensation respectively?

 30° and 26°
 30° and 45°
 26° and 30°
 45° and 26°

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Power Systems
Length of short transmission line is up to

 any of the above
 150 km
 40 km
 80 km

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Power Systems
Three generators rated 100 MVA, 11 kV have an impedance of 0.15 pu each. If in the same plant, these generators are being replaced by a single equivalent generator, the effective impedance of equivalent generator will be

 0.05 pu
 0.45 pu
 0.25 pu
 0.15 pu

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Power Systems
A 3 layer and diameter of each strand is d, then find the total diameter of ACSR conductor?

 d
 5d
 3d
 2d

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Power Systems
Peterson coil is used in case of transmission line for

 improve power factor
 reduce ferranti effect
 compensation of arcing grounds
 increase the voltage level

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