PowerWorld Simulator case Problem 3_60 duplicates Example 3

PowerWorld Simulator case Problem 3_60 duplicates Example 3.13 except that a resistance term of 0.06 per unit has been added to the trans-former and 0.05 per unit to the transmission line. Since the system 1s no longer lossless, a field showing the real power losses has also been added to the oneline. With the LTC tap fixed at 1.05, plot the real power losses as the phase shift angle is varied from — 10 to +10 degrees. What value of phase shift minimizes the system losses?

[Pw] 3.61 Repeat Problem 3.60, except keep the phase-shift angle fixed at 3.0 degrees while varying the LTC tap between 0.9 and 1.1. What tap value minimizes the real power losses?