6-2. A 13.5-kV 20-MVA 0.8-PF-lagging 60-Hz two-pole Y-connected steam-turbine generator has a synchronous reactance of 5.0 Ω per phase and an armature resistance of 0.5 Ω per phase. This generator is operating in parallel with a large power system (infinite bus).
(a) What is the magnitude of EA at rated conditions?
(b) What is the torque angle of the generator at rated conditions?
(c) If the field current is constant, what is the maximum power possible out of this generator? How much reserve power or torque does this generator have at full load?
(d) At the absolute maximum power possible, how much reactive power will this generator be supplying or consuming? Sketch the corresponding phasor diagram. (Assume IF is still unchanged.)
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