In the wind power plant, which of the following features differentiates the wound rotor synchronous generator from squirrel cage induction generators?
1
The wound rotor synchronous generator includes an external mechanism to control the rotor output.
2
A gearbox is not required in the wound rotor synchronous generator.
3
The wound rotor synchronous generator includes an external mechanism to control the stater side.
4
A reactive power compensation unit is not needed in wound rotor synchronous generators.