Description: The single-line diagram of the power system for fault study is shown in Figure 1. The power and voltage rating for generators G1 and G2 (note that G1 and G2 are two identical generators), motor M, transmission line, transformer T1 and transformer T2 are given in Table 1. The neutrals of the generator are solidly grounded. The motor neutral is grounded through a reactance 0.03 pu on the motor base. G1 G2 Bus-1 T1 Plant Bus-3 Transmission Line Rated power of generators (G 1 & G2) Rated power of motor M Rated voltage of (G 1 & G2) Rated voltage of M Transformer T1 primary voltage rating Transformer T1 secondary voltage rating Transformer T2 primary voltage rating Transformer T2 secondary voltage rating Generators (G 1 & G2) Motor M Transmission line Transformer T1 Transformer T2 Bus-4 T2 Figure 1: Single-line diagram Table:1 Ratings of the system components Bus-2 M Table: 2 Values for this table are to be generated via the excel spread sheet Positive sequence Negative sequence reactance [pu] reactance [pu] 0.18 0.141 0,224 0,246 0.105 0.105 0.09 0.09 0.09 0.09 100 MVA 100 MVA 13,8 kV 13.8 kV 13.8 kV 138 kV 13.8 kV 138 kV 0.03 pu Zero sequence reactance [pu] 0.06 0.112 0.351 0.09 0.09 Part 3: [9 marks] Assuming the pre-fault bus voltages are at 1.02 pu, calculate the fault currents in each phase for a single-line to ground fault at Bus-2. Specify your answers in per-unit. Part 4: [9 marks] Assuming the pre-fault bus voltages are at 1.02 pu, calculate the fault currents in each phase for a line-to-line fault at Bus-2. Specify your answers in per-unit. Part 5: [9 marks] Assuming the pre-fault bus voltages are at 1.02 pu, calculate the fault currents in each phase for a line-to-line-to-ground fault at Bus-2. Specify your answers in per-unit.