A synchronous generator having a synchronous reactance of 1.0 pu is connected to in- finite bus-bars of 1.0 pu voltage through two parallel lines each of 0.5 pu reactance.
(a) Calculate the generator excitation, terminal voltage and power output when it delivers rated current (1.0 pu) at unity power factor at its terminals. What active and reactive power are delivered to the infinite bus-bars?
(b) Calculate the generator excitation and terminal voltage when the generator is delivering zero active power and 0.5 pu lagging reactive power to the infinite busbars.
(c) With one line disconnected, can the generator deliver the same active power to the infinite bus-bars at the same excitation as in part (a)? Explain.