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Power Systems

Power Systems
For load flow studies, What are the quantities specified at load bus are

 δ and Q
 P and V
 V and δ
 P and Q

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Power Systems
Proximity effect depends on

 distance between the conductors
 frequency
All of these
 relative permeability

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Power Systems
Steady state stability of a power system is improved by

All of these
 decreasing generator inertia
 using double circuit line instead of single circuit line
 single pole switching

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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?

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

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Power Systems
Zero voltage regulation is possible only for

 unity power factor
 leading power factor
All of these
 lagging power factor

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Power Systems
A 20 MVA generator has inertia constant of 0.5 pu. Find new value for 50 MVA base?

 0.4 pu
 0.5 pu
 0.2 pu
 0.1 pu

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