Determine the critical clearing angle of the system shown in Fig. E.17.4 when the voltage E = 1.2 p.u. and voltage of infinite bus is 1.0 p.u. Determine the critical clearing time of the breaker if the inertia constant (H) of the system is 3.4 p.u. Plot the swing curves both for the sustained fault condition and when the fault is cleared after 5 cycles. Assume a time interval of (i) 0.05 sec, (ii) 0.025 sec, and (iii) 0.1 sec.
