A balanced three-phase Y-connected generator with positive sequence has an impedance of 0.2 + j0.5 ohms/ø and an internal voltage of 120 V/ø. The generator feeds a balanced three-phase Y-connected load having an impedance of 39 + j28 ohms/ø. The impedance of the line connecting the generator to the load is 0.8 + j1.5 ohms/ø. The a-phase internal voltage of the generator is specified as the reference phasor.
a. Construct the a-phase equivalent circuit of the system.
b. Calculate the three-line currents IaA, IbB, and IcC.
c. Calculate the three-phase voltages at the load Van, Vbn, and Vcn.
d. Calculate the line voltages Vab, Vbc, and Vca at the terminals of the load.
e. Calculate the phase voltages at the terminals of the generator Van, Vbn, and Vcn.
f. Calculate the line voltages Vab, Vbc, and Vca at the terminals of the generator.
g. Repeat (a) - (f) for a negative phase sequence.