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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 Q
 P and V
 V and δ

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Power Systems
The load current in short circuit calculations are neglected because

 short circuit currents are greatly out of phase with load currents
 both 1 and 2
 nether 1 nor 2
 short circuit currents are much larger than load currents

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

 2d
 d
 5d
 3d

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Power Systems
Surge impedance loading of a transmission line can be increased by

 increasing its voltage level
 addition of lumped capacitance in series
 addition of lumped inductance in parallel
 both 1 and 3

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Power Systems
A generator has a rating of 10 MVA, 5 kV has a reactance of 0.02 pu. Find the reactance at a new base values of 50 MVA, 10 kV?

 0.025
 0.25
 0.05
 0.02

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Power Systems
The Gauss Seidel load flow method has following disadvantages. Which of the following statement is wrong?

 A good initial guess for voltages is essential for convergence
 Slow convergence
 Choice of slack bus affects the convergence
 Unreliable convergence

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