In developing the Gamma generation, Nordex has remained true to proven principles, using tested series engineering and assigning top priority to the dependability of all system components. Explains Dr. Eberhard Voss, Chief Technology Officer of Nordex: "The Gamma generation sets new standards in availability, ease of service and quality as well as delivery and installation times. As far as grid compliance and interconnection are concerned, it satisfies the most demanding international requirements."
Nordex USA will manufacture the Gamma generation wind turbines at its new manufacturing facility in Jonesboro, Arkansas. "Developers and wind farm operators in America are demanding greater efficiencies, performance and output per unit of investment on wind energy projects," said Ralf Sigrist, President and CEO of the company. "The new generation of Nordex turbines will increase the ROI for customers." The first American project using the new generation will be Shirley Wind in Glenmore, Wisconsin.
The N80/2500, N90/2500 and N100/2500 wind turbines are based on a common technical platform. A consistent modular design allows Nordex to add type-specific components and customer options.
The modular concept and the maximum component weight of 50 tons make it possible to transport turbines anywhere in the world, as well as speed up both installation and service of the machines. Nordex has redesigned the nacelle, hub and rotor blades in the new generation to be both lighter and more robust. This also simplifies transportation and installation, while simultaneously reducing the static and dynamic loads on the overall turbine.
Nordex has also redesigned the rotor shaft and integrated the slip ring in the interest of extending the service life. The slip ring is protected from weather and mechanical influences, and is also heated to stop condensation from forming.
Nordex has further developed its proprietary control system in the yaw system. The loads are evenly distributed over three to four yaw drives, and the nacelle can track the wind dependably even at turbulent sites. An improved system for temperature control ensures maximum yield in both permafrost and desert climates.
The 2.5 MW wind turbines feature excellent control of reactive power capability, which stabilizes the frequency of the public grid. The wind power systems can continue to operate during transient voltage dips or surges (Fault Ride-Through). Certified for grids in the most demanding international markets, the turbines can also be flexibly adapted to new and complex connection requirements.
Priority has also been given to the ease of service. Low maintenance and maintenance-free components support dependable turbine operation and speed up routine service work. Components subject to high stress, such as the rotor and generator bearings, as well as the point where the gears mesh in the pitch and yaw systems, are protected by separate automatic lubricating systems.
The nacelle and the hub are generously sized from an ergonomic point of view. Uninterrupted working areas with sufficient space and light support fast and safe servicing. All the components can be directly accessed and, up to a weight of one ton, can be simply and inexpensively maintained with the aid of a new crane system.
Nordex at Windpower 2010: booth 6814