Reactances are given in per unit on a common base. If the infinite bus receives 1 pu real power at 0.

Consider the power system shown in the attached document. Reactances are given in per unit on a common base. If the infinite bus receives 1 pu real power at 0.95 pf lagging initially and a three phase solid fault occurs at F on bus 3 and is cleared with all circuit breakers remaining closed & transmission lines in tact, determine whether the system is stable by finding the new power angle and the clearing time. Assume Pm is constant and H=3 pu.