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POWER SYSTEMS

Power Systems
Surge impedance loading of a 3-phase, 400 kV transmission line is 400 Ω. The surge impedance loading is

 800 MW
 400 MW
 1600 MW
 200 MW

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

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

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Power Systems
For transmission line which one of the following relation is true?

 AD - BC = 1
 AD - BC = 0
 AD - BC = -1
 AD + BC = 0

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Power Systems
A 3-phase transmission line has its conductors at the corners of an equilateral triangle with side 3m. The diameter of each conductor is 1.63 cm. The inductance of the line per phase per km is

 1.043 mH
 1.232 mH
 1.182 mH
 1.093 mH

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Power Systems
For some given transmission line the expression for voltage regulation is given by (Vs - Vr)/Vr *100%. Hence,

 this may either be a medium line or short line
 this expression is true for any line
 this must be a short line
None of these

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