Figure 3.32 shows the oneline diagram of a three-phase power system. By selecting a common base of 100 MVA and \(22 \mathrm{kV}\) on the generator side, draw an impedance diagram showing all impedances including the load impedance in per-unit. The data are given as follows:

Lines 1 and 2 have series reactances of 48.4 and \(65.43 \Omega\), respectively. At bus 4, the three-phase load absorbs 57 MVA at \(10.45 \mathrm{kV}\) and 0.6 power factor lagging.

Transcribed Image Text:

G: T: T: T3: TA M: 90 MVA 50 MVA 40 MVA 40 MVA 40 MVA 66.5 MVA 22 kV 22/220 kV 220/11 kV 22/110 kV 110/11 kV 10.45 kV x = 0.18 per unit x = 0.10 per unit x = 0.06 per unit x = 0.064 per unit x = 0.08 per unit x = 0.185 per unit