GE has tested a 2.5 MW prototype installed in May 2004 at Wieringermeer in the Netherlands while installation of the first 3 MW machine is planned for the summer of 2006. Both turbines are expected to be commercially available in Europe by the end of 2006.
The 2.5 MW machine will be available with a 100 m rotor diameter, while the 3 MW turbine will offer both 90 m and 94 m rotor diameters. Advanced control features, including a pitch regulation system with power/torque control capability, and improved use of the drive train damper mitigate the increased loads of the larger rotor. Both units also employ a permanent magnet synchronous generator, enabling higher efficiency at lower wind speeds.
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