(Solved): A power system is identical to that of the lecture example given below, except that the impedance ...

A power system is identical to that of the lecture example given below, except that the impedance of each of the parallel transmission lines is 0.5 and the delivered power is 0.8 per unit when both the terminal voltage of the machine and the voltage of the infinite bus are 1.0 per unit. j0.1 to o X' = 0.20 P Figure 1: Lecture example a) Determine the power-angle equation for the system during the specified operating condi- tions. b) Let H = 5.0 MJ /MVA. If a three-phase fault occurs on the power system at a point on one of the transmission lines at a distance of 30% of the line length away from the sending-end terminal of the line, determine the power-angle equation during the fault and the swing equation. Assume the system is operating under the conditions specified in last part when the fault occurs.