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GATE 2016 EE (SET 1) Q19

GATE 2016 EE (SET 1) Q19

19. In a 100 bus power system, there are 10 generators. In a particular iteration of Newton Raphson load flow technique (in polar coordinates), two of the PV buses are converted to PQ type. In this iteration,

Solution:

  • The number of unknown voltage angles increases by two and the number of unknown voltage magnitudes increases by two.
  • The number of unknown voltage angles remains unchanged and the number of unknown voltage magnitudes increases by two.
  • The number of unknown voltage angles increases by two and the number of unknown voltage magnitudes decreases by two.
  • The number of unknown voltage angles remains unchanged and the number of unknown voltage magnitudes decreases by two.

Solution: (A)

For load bus both v and ╬┤ are unspecified, so both should be calculated. So option A is correct.

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