모모 A j200 j40.0 모모 3 •C j20a SYSTEM MODELING 165 머 5월 B Figure 6.32 One-line diagram for Prob. 6.16. 16,17 If the voltage of bus C in Prob. 6.16 is 13.2 kV when the motor draws 24 MW at 0.8 power factor leading, calculate the voltages of buses A and B. Assume that the two generators divide the load equally. Give the answer in volts and in per unit on the base selected for Prob. 6.16. Find the voltages at A and B when the circuit breaker connecting generator 1 to bus A is open while the motor draws 12 MW at 13.2 kV with 0.8 power factor leading All other circuit breakers remain closed. Generator 1: Generator 2: Synchronous motor 3: 20 MVA, 18 kV, X" = 20% 20 MVA, 18 kV, X" = 20% 30 MVA, 13.8 kV, X" = 20% Three-phase Y-Y transformers: 20 MVA, 138Y/20Y kV, X = 10% Three-phase Y-A transformers: 15 MVA, 138Y/13.8A kV, X = 10%