Figure 3.32 shows the one-line diagram of a three-phase
Chapter , Problem 3.23(choose chapter or problem)
Figure 3.32 shows the one-line diagram of a three-phase power system. By selecting a common base of 100 MVA and 22 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: G: 90 MVA 22 kV x = 0:18 per unit T1: 50 MVA 22/220 kV x = 0:10 per unit T2: 40 MVA 220/11 kV x = 0:06 per unit T3: 40 MVA 22/110 kV x = 0:064 per unit T4: 40 MVA 110/11 kV x = 0:08 per unit M: 66.5 MVA 10.45 kV x = 0:185 per unit Lines 1 and 2 have series reactances of 48.4 and 65.43 W, respectively. At bus 4, the three-phase load absorbs 57 MVA at 10.45 kV and 0.6 power factor lagging.
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