Which of the following power plants uses a gear box mechanism and an induction generator?

Wind power plants use a gearbox mechanism and an induction generator.

Wind Power Plant:

The basic components of the wind power system are:

1) Tower: It is the structure on which the rotating blade is mounted.

2) Rotor: Rotor is connected to a high-speed rotating blade. When the wind blows, blades convert the horizontal movement of wind into rotational force, turning the shaft. The generator connected to the shaft then converts this movement into electricity.

3) Shaft: It is the part that is without mechanical gear and is used to drive the generator. There are two types of shafts present in wind turbines.

• Low-speed shaft: It connects the external gearbox to the rotor blades and rotates at a very slow speed of 30 to 60 rpm.
• High-speed shaft: It is connected with the generator, which is responsible for converting mechanical energy produced from high-speed blades into electrical energy.
   

4) Gear System: It is externally connected to the shaft and used to increase rotational speed from 30 to 60 rpm to about 1000 to 1800 rpm, the rotational speed required by most generators to produce electricity.

5) Nacelle: It is a cover housing that contains all components of the wind power system such as shaft, gearbox, generator, controller & brake assembly.