Two buses in a system are maintained at the voltages V1 = 1.25∠30° and V2 = 1.35∠25°. Bus 1 and Bus 2 are interconnected by a transmission line of impedance (1.3 + j 7) Ω. The power flow direction is
- A. Real power flows from Bus 1 to Bus 2
- B. Real power flows from Bus 2 to Bus 1
- C. No real power flows between the buses
- D. Reactive power flows from Bus 2 to Bus 1
Answer: A. Real power flows from Bus 1 to Bus 2
Explanation: Excluded from evaluation by ISRO. Power angle δ1 = 30° > δ2 = 25°, so active real power flows from Bus 1 to Bus 2; reactive power flow depends on relative voltage magnitudes and line reactance.