Question

The maximum reactive power generation of a generator is limited because of

• A. Stability limit of the machine
• B. Overheating of the rotor
• C. Flame instability of a boiler
• D. Over heating of the stator windings

Hint:

Rotor heating limits the reactive power capability of a generator.

Answer 1

The Correct Option is B

Reactive power increases rotor current, which can cause excessive rotor heating. Therefore, the maximum limit on reactive power generation is primarily due to rotor thermal limits.