A commercial grade horizontal wind turbine has the following subsystems
Rotor
- 1,2, or 3 blades
- Aero braking systems
- Pitch controls
Drivetrain
- Gearbox
- Hydraulic Systems
- Shafts
- Braking system
- Nose cover (nacelle)
Yaw system
- Direction control
- to the wind stream
Electrical and Electronic
- Generator
- Relays
- Circuit Breakers
- Wiring
- Drop Cables
- Controls
- Sensors
- Power Electronics
Support Systems
- Roads
- Ground Support Equipment
- Power Substation
