Given a system as shown below:
50 MVA 13.8 kV
T.L. Z = j20 (ohms)
X = 100%
Load
Z = 12 + j0 (ohms/phase) A connected
3
3
13.8:138 kV 50 MVA X = 10%
138:13.8 kV 40 MVA
X = 10%
(a) Draw the per-phase equivalent circuit with all impedances in per-unit values. (Select S3base = 100 MVA and VLbase = 138 kV at the transmission line section) (b) Compute the voltage magnitude (line-to-line in kV) and the current (in kA) at generator terminals. It is assumed that the voltage at load is 1 pu