The Vestas V29 is a 225 kW, pitch-regulated, upwind wind turbine with active yaw and a high speed rotor with three blades.
The V29 is based and developed on the experiences gained with the V27 – 225 kW wind turbine.
The blades are made of fiberglass reinforced polyester, each consisting of two blade-shells, glued on a supporting beam. By special glued in thread-rods, the blades are fastened to a blade steel root which is mounted in two bearings. The blades are mounted in a blade bearing console which is bolted to the blade hub.
Through an independently supported main shaft, the power is transmitted to the generator through a two stage gearbox. The generator is changeable between 8 poles as “the little generator” and 6 poles as “the big generator”. The generator is asynchronous and is directly connected to the grid. The rotor has two different speeds depending on the number of poles with which they are connected. This is done to achieve a maximum performance both at low and high wind speeds.
From the gearbox to the generator the power is transmitted through a transmission shaft. Braking of the turbine is done by full feathering. Emergency stop activates the hydraulic disc brake, which is fitted to the high speed shaft of the gearbox.
All functions of the turbine are monitored and controlled by a microprocessor based control unit, and variations in the blade position are performed by a hydraulic system, which also delivers pressure to the brake system.
Yawing is done by two yawing motors, which mesh with a large, toothed wheel mounted on the top of the tower. The system is a slide system with built-in friction.
The nacelle is fully enclosed in a fiberglass reinforced cover. There is access through a central opening independent of the orientation of the nacelle in relation to the tower.
The tubular tower is metalized and painted, it contains an internal ladder, and can be delivered in one, two, or three sections. The lattice tower is delivered galvanized.