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Assume that the base voltage is 4600 V in the system of Problem 2.11, and that 50 MVA is the corresponding apparent power base. Repeat Problem 2.11 using per unit values.

Problem 2.11

A load of 30 MW at 0.8 p.f. lagging is served by two lines from two generating sources. Source 1 supplies 15 MW at 0.8 p.f. lagging with a terminal voltage of 4600 V line-to-line. The line impedance is (1.4 + jl.6) Ω per phase between source 1 and the load, and (0.8 +jl) Ω per phase between source 2 and the load. Find

a) The voltage at the load terminals

b) The voltage at the terminals of source 2, and

c) The active and reactive power supplied by source 2.

Electrical & Electronics, Engineering

  • Category:- Electrical & Electronics
  • Reference No.:- M92172345

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