TUNING UP YOUR FLEET – UPGRADES MADE BY THE NORDEX GROUP

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Upgrades

Upgrades made by the Nordex Group – Higher yields & optimized performance

We use over 35 years of expertise in manufacturing our highly-efficient wind turbines to deploy the latest developments of our serial production, as well as for the continuous optimisation of the existing fleet.

By optimising performance, availability and security of existing turbines, we enable our customers to achieve higher yields. At the same time, the experience of our long-standing, globally-operating Service network, the analysis of the data from our wind farms installed worldwide, and the solutions generated at our headquarters in Hamburg, are all continuously integrated into all new turbine developments, as well as our existing fleet.

With the Upgrades made by Nordex range, and the Xtended Series, our Upgrades & Modernisation team offers operators of existing turbines the opportunity to bring their technology quickly and cost-efficiently in line with the latest developments via tailor-made upgrade packages.

Our precisely fitting upgrade products are developed to turn existing fleets into state-of-the-art solutions, without any lengthy project planning process. An extended lifetime, higher yields, or an optimised sound concept – we not only improve your return on investment, but set high availability and safety as the top priority.


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Xtended Power alpha & beta

The package for extra yield of up to 2%

1. OPTIMISED PITCH CONTROL
With the improved start-up upgrade, Alpha and Beta generation turbines profit from a better performance at wind speeds lower than six meters per second. Fine-tuned blade adjustment control results in better inflow conditions, which in turn, increase performance. To upgrade existing turbines to the same standard of technology, we offer a project-specific simulation of the improved performance.

2. INTELLIGENT TURBINE CONTROL
Our Advanced Power technology makes it possible to increase performance at moderate wind speeds by incorporating additional environmental parameters in turbine control. The Advanced Power solution enables the intelligent interplay of sensors, the evaluation of measured data and automatic response. This customised response to actual environmental conditions optimises the control of your turbine.

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XTENDED POWER GAMMA, DELTA, DELTA4000

UP TO 3% ADDITIONAL YIELD FOR YOUR TURBINE

Our ‘Xtended Power’ upgrade package for Gamma, Delta, and Delta4000 offers the flexibility needed to max out the full potential of your turbine and achieve an increase of the annual energy production.
The yield of Gamma and Delta turbines can be increased by up to 3.0%, the yield of Delta4000 turbines can be increased up to 2.5%, depending on the site conditions.

1. ANALYSIS OF THE POTENTIAL FOR OPTIMISING A SPECIFIC PROJECT

Using our TÜV-certified analysis method as a basis, and taking into account the specific characteristics of your site, we evaluate the load buffers of each individual wind turbine to calculate the potential for boosting its yield.

2. SELECTION OF THE IDEAL POWER MODE FOR YOUR SIDE

Depending on your wind farm’s specific potential for optimisation, our experts propose one of the new developed power modes, and, where applicable, the combination with our Xtended Lifetime product.

3. ADMINISTRATIVE SUPPORT AND IMPLEMENTATION

Our team of technology experts and local operatives will help you communicate with the relevant authorities and grid operators to ensure a seamless upgrade process of your wind turbine.

Xtended Power Gamma & Delta: Currently available for type N90/2500 Gamma and type N117/3000, N117/3600, N100/3300 Delta turbines.
Xtended Power Delta4000: Currently available for N149/4.0-4.5 turbines operating at 4.8 MW (690 V). For other Delta4000 turbine types, an individual yield optimization analysis can be offered.

Seamless contractual transition
For reliable continued operation of your turbine, we offer you the possibility to agree on a Service contract beyond the twentieth year of operation.

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Xtended Lifetime

Turbines of the generations Alpha, Beta, Gamma and Delta have a design life of 20 years. However, depending on the location, wind load and turbine condition, they can also be operated many years beyond that. These investments generate extra yield with comparatively low expenses – especially if repowering is not possible but the location is still attractive. For the lifetime extension of your turbine, proof of structural stability and operational strength is required.

More time for operations, more time for yield

XTENDED LIFETIME ALPHA & BETA
Assessment for the lifetime extension of your wind turbine is carried out in two steps. First, an expert from a recognized certification body conducts an on-site, visual inspection of your turbine, rotor blades included, and assesses its current condition. In the second step, an analytical calculation that determines the future operating potential of the turbine is carried out.

XTENDED LIFETIME GAMMA & DELTA
The lifetime extension of your wind turbine is determined by analytical verification. For this purpose, the site-specific load effects of your turbine is calculated according to a TÜV-NORD certified methodology and compared with the design loads for this type of turbine. For an even more precise result, our all-in-one solution also includes the review of non load-driven safety-relevant components and major electrical components of the Gamma and Delta platform.

As the manufacturer, we have all relevant data from previous years, from design drawings to type testing, load model and SCADA data that is required in order to accurately calculate the operating time. In addition to assessing your turbine, we also support you in implementing the measures or requirements needed for lifetime extension. Finally, you will receive an expert report for submission to the responsible authorities, if required.

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Xtended Power Sound

THE XTENDED POWER SOUND CONCEPT

The package includes two complementary products, ‘Serrations’ and ‘Sound Mode Optimisation’. Both reduce sound emissions whilst increasing performance.

1. SERRATIONS
Serrations are thin, zig-zagged components attached to the rotor blade which reduce sound. They modify trailing edge turbulation by replacing the straight edge of the rotor blade with a serrated one. This reduces the sound power level by around 1.5 decibels, allowing the turbine operator to switch to a higher mode of operation. The turbine’s yield can thus be increased by up to 6% without exceeding regulatory specifications.

2. SOUND MODE OPTIMISATION
In order to operate turbines with reduced sound, the power must be curtailed. This is done by adjusting generator speed and torque. In order to achieve sound reduction, the rotational speed of the rotor blades, and thus the generator speed, has to be reduced. The Sound Mode Optimisation upgrade improves the power curve through a targeted increase of the torque while maintaining a stable rotor speed and low sound emission. Yield can be increased up to 7% this way.

SITE-SPECIFIC ANALYSIS
In the first step, the site-specific optimisation potential of your wind turbine is determined. The serrations installation is carried out by our rope technicians directly on the rotor blades, which do not have to be dismantled for this purpose. After installing the serration, our engineers set the parameters. The system is then switched to a higher operating mode, resulting in a performance increase. The additional use of the “Sound Mode Optimisation” leads to a further increase in yield.

Both products are also available separately.

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Winter Products

LOW TEMPERATURES, HIGH YIELD

Minimise downtimes and secure higher yields during the cold months with our winter product, the ‘Rotor Blade Ice Detection System’.

ROTOR BLADE ICE DETECTION SYSTEM
Benefit from the continuous monitoring of the rotor blades for ice formation and increase personal safety in your wind farm. The measuring system detects the formation of ice on the rotor blade, even when the turbine is not in operation. If critical ice is detected on the rotor blades, an alarm message is displayed and the turbine shuts down. The turbine automatically restarts once the critical ice formation is no longer present.

Available for generation Delta and Gamma turbines.

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Vortex Generators

OPTIMIZED FLOW CONDITIONS: INCREASE YOUR ANNUAL ENERGY YIELD OF APPROXIMATELY 1.5%
Increase your turbine’s efficiency by around 1.5% with optimised flow conditions at the blade. Vortex Generators optimise the aerodynamics of the rotor blades and increase the power output of the wind turbine. They are individually adapted to each rotor blade type, and installed on the top side of the rotor blade. The air flow is stabilised by the generation of small vortexes in the boundary layer air flow, which delays stall. The resulting increased
drag on the rotor blades increases the power output of the wind turbine.

Available for specific N100 Gamma generation turbines.

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Upgrade Brochures & Factsheets