Two 3-phase, 6.6 kV, star-connected alternators supply a load of 3000 kW at .f. lagging. The synchronous impedance per phase of machine A is 0.5+j1.0 ud of machine B is 0.4+j1.2 2. The excitation of machineA is changed so that elivers 150 A at a lagging power factor, and the governors are so set that the is shared equally between the machines. Determine the current, power factor, uced e.m.f. and the load angle of each machine.

Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter2: Fundamentals
Section: Chapter Questions
Problem 2.41P
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Q2: Two 3-phase, 6.6 kV, star-connected alternators supply a load of 3000 kW at
0.8 p.f. lagging. The synchronous impedance per phase of machine A is 0.5+j1.0
Q and of machine B is 0.4+j1.2 N. The excitation of machine A is changed so that
it delivers 150 A at a lagging power factor, and the governors are so set that the
load is shared equally between the machines. Determine the current, power factor,
induced e.m.f. and the load angle of each machine.
Transcribed Image Text:Q2: Two 3-phase, 6.6 kV, star-connected alternators supply a load of 3000 kW at 0.8 p.f. lagging. The synchronous impedance per phase of machine A is 0.5+j1.0 Q and of machine B is 0.4+j1.2 N. The excitation of machine A is changed so that it delivers 150 A at a lagging power factor, and the governors are so set that the load is shared equally between the machines. Determine the current, power factor, induced e.m.f. and the load angle of each machine.
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