In the development of 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, CTO at Nordex: “The Gamma generation particularly sets new standards in availability, ease of service and quality as well as delivery and installation times. As far as grid compliance is concerned, it satisfies all prerequisites necessary to qualify for the System Service bonus (SDL bonus) in Germany.”
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 tonnes make it possible to transport turbines to anywhere in the world and 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 further redesigned the rotor shaft and integrated the slip ring in the interests of achieving a long service life. In this way, the slip ring is protected from the weather and mechanical influences. Further, it is heated to stop condensation from forming.
In the yaw system Nordex has further developed its proprietary control 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 concept 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 stabilises 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 the grids of 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 wind 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 tonne, can be simply and inexpensively maintained with the aid of a new crane system.
At the beginning of 2010, the number of Nordex wind turbines installed around the world since 1985 passed the 4,000 mark. Of the globally installed nominal output of 5.67 GW, some 52% is accounted for by the multi-megawatt class, which was launched in 2000.
Nordex at EWEC 2010: Hall 3, stand no. 3020.