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Power Systems

Power Systems
Normally Z bus matrix is a

 full matrix
 null matrix
 unit matrix
 sparse matrix

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Power Systems
Reheat cycle in thermal power plant is used to

 utilize heat of flue gases.
 reduce loss of heat.
 improve condenser performance.
  increase thermal efficiency.

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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?

 400 MW
 456 MW
 386 MW
 478 MW

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Power Systems
Which of the following material is not used as fuse element?

  Carbon.
  Silver.
  Aluminium.
  Copper.

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Power Systems
When reactance grounding is used in network, the voltage between neutral and ground is

 IN × Xn
 IR0 × Xn
 3×IR0 × Xn
 both 1 and 3

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

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

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