In load flow studies PV bus is treated as PQ bus when

Electrical Engineering XYZ MCQs

In load flow studies PV bus is treated as PQ bus when:

1. Reactive power goes beyond limit
2. Voltage at the bus become high
3. Phase angle become high
4. Any of the above

Correct answer: 1. Reactive power goes beyond limit

Explanation: When the reactive power injection at a PV bus exceeds its defined limit, it can lead to voltage instability issues in the system. To prevent voltage collapse, the PV bus might be temporarily treated as a PQ bus, fixing its reactive power injection while allowing the voltage magnitude to vary.