The per-unit equivalent circuit of two transformers Ta and Tb connected in parallel, with the same nominal voltage ratio and the same reactance of 0.1 per unit on the same base, is shown in Figure.
Transformer Tb has a voltage-magnitude step-up toward the load of 1.05 times that of Tb (that is, the tap on the secondary winding of Ta is set to 1.05). The load is represented by 0.8 + j0.6 per unit at a voltage V2 = 1.0/0° per unit.
Determine the complex power in per unit transmitted to the load through each transformer. Comment on how the transformers share the real and reactive powers.
