Given the power system below, develop the sequence networks and determine the fault currents (single line to ground, double line to ground, line to
Given the power system below, develop the sequence networks and determine the fault currents (single line to ground, double line to ground, line to line and three phase faults) if the fault occurs on point F. Let X = 5 ohms. Determine as well the positive sequence current at "line b". Let the bases at the generator side. Gl ratings 69KV 30000 KVA %X; = 10 %X= 7.5 %Xo = 5 TL; ratings Z-Z-Z 3+j5 2 BUSBAR Moor TL; ratings ZL-Z-Zo 10+12052 TL, ratings ZL=Z: Zo 10+120 2 Moor F Transformer 1 5000 KVA %6X19X296X = 20 69 KV/13.8 KV A DO Transformer 2 5000 KVA %X = %X;= %X, = 10 69 KV/13.8 KV MI ratings 13.2KV 10000 KVA %X; -15 %X = 10 %X=5 M2 ratings 13.2KV 10000 KVA 9X-15 %X; = 10 %Xo = 5
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