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?

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

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Power Systems
The advantage of hydro electric power station over thermal power station is

 the initial cost of hydro electric power station is low
 hydro electric station can be constructed at the place where the energy is required
 the operation cost of hydro electric power station is low
 hydro electric power station can supply the power throughout the year

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Power Systems
In a biased differential relay the bias is defined as the ratio of

  fault current and operating coil current.
  number of turns of restraining and operating coil.
  operating coil current and restraining coil current.
  fault current and restraining coil current.

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