Appendix G: Additional Solved Examples of Shunt Faults

Example G.1

Consider the system shown in Figure G.1 and the following data:

Generator G1: 15 kV, 50 MVA, X1 = X2 = 0.10 pu and X0 = 0.05 pu based on its own ratingsSynchronous motor M: 15 kV, 20 MVA, X1 = X2 = 0.20 pu and X0 = 0.07 pu based on its own ratingsTransformer T1: 15/115 kV, 30 MVA, X1 = X2 = X0 = 0.06 pu based on its own ratingsTransformer T2: 115/15 kV, 25 MVA, X1 = X2 = X0 = 0.07 pu based on its own ratingsTransmission line TL23: X1 = X2 = 0.03 pu and X0 = 0.10 pu based on its own ratings

Assume a single line-to-ground (SLG) fault at bus 4 and determine the fault current in ...

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