The wind turns the blades connected to rotor shaft inside the nacelle. The rotation of the shaft then goes into a gearbox which increases the rotation speed. The generator converts the rotational kinetic energy into electrical energy.
The wind generator system can be on-grid (grid connected) or off-grid (standalone) system.
- Horizonl Axis Wind Turbine (HAWT)
- Vertical Axis Wind Turbine (VAWT)
- Off-grid/Standalone system
- On-grid/Grid connected system
- Small and Mid-size wind turbine
The wind generator system consists of:
- Nacelle – the housing of the generator, gearbox, breaks and drive train.
- Tower/Pole – structure that support the nacelle and it can be tilt-ups, guyed lattice, and freestanding. Height of pole is necessary to provide safe condition and important factor in the design and wind speed
- Inverter – device that convert current from direct current DC to household conventional alternative current AC in off-grid system or connect to grid for grid connected system
- A dump load – device to divert excess generated energy in off-grid system
- Battery bank – energy storage for the generated energy in off-grid system
- Controller – system controller for the operation, performance and safety