Repeat Problem 7.24, except place the fault midway between buses 2 and 3 . Determining the values for line faults requires that the line be split with a fictitious bus added at the point of the fault. The original line's impedance is then allocated to the two new lines based on the fault location, which is \(50 \%\) each for this problem. Fault calculations are then the same as for a bus fault. This is done automatically in PowerWorld Simulator by first right-clicking on a line, and then selecting Fault. The Fault dialog appears as before, except now the fault type is changed to In-Line Fault. Set the location percentage field to \(50 \%\) to model a fault midway between buses 2 and 4 .

Problem 7.24

PowerWorld Simulator case Problem 7_24 models the system shown in Figure 7.14 with all data on a 1000 MVA base. Using PowerWorld Simulator, determine the current supplied by each generator and the per-unit bus voltage magnitudes at each bus for a fault at bus 3 .

Figure 7.14

G1 T1 1 j50 ( 150 T T2 G2 150 (2 T3 G3