A synchronous generator is connected to a 24 kV infinite bus through two parallel transmission lines. The synchronous reactance of the generator is 3 Ω, and the inductive reactance of each transmission line is 2 Ω. The equivalent field voltage (Ef ) is 25 kV.

a. What is the maximum active power that the generator can deliver to the infinite bus?
b. Suppose a lightning strike causes one of the transmission lines to open. Assume that the excitation of the generator are unchanged (magnitude of Ef remains the same).
c. What is the maximum active power that the generator can deliver to the infinite bus?