A 15-kV 35-KVA 0.76-PF-lagging 50-Hz four-pole Y-connected steam-turbine generator has a synchronous reactance of 3.50 Ω per phase and an armature resistance of 0.75 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 generator’s torque angle 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?
A 15-kV 35-KVA 0.76-PF-lagging 50-Hz four-pole Y-connected steam-turbine generator has a synchronous reactance of 3.50 Ω per phase and an armature resistance of 0.75 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 generator’s torque angle 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) Sketch the corresponding phasor diagram and calculate for the armature current (assume the field current is still unchanged)
e) At the absolute power possible, how much reactive power will this generator be supplying or consuming?
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