Geovane Wind Turbine



A unique solution that now gives you, the wind farm operator, access to the live True North orientation of your individual wind turbines! Eliminates the need for expensive third-party alignment services. Fast detection of turbine alignment degradation. Establishes an identical True North reference point for all wind turbines.


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Geovane Wind Turbine

Highly accurate and consistent True North live data. Directly to you, the wind farm operator. Incorrect north alignment of wind turbines can lead to erroneous performance assessment of wind turbines as well as suboptimal wind sector management. We have a unique solution that now gives you, the wind farm operator, access to the live True North orientation of your individual wind turbines!

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  • Eliminates the need for expensive third-party alignment services
  • Resolves issues related to alignment degradation over time
  • Establishes an identical True North reference point for all wind turbines
  • Forms the new basis for accurate wind sector management
  • Permits improved wake control
  • Provides highly improved turbine-to-turbine performance assessment
  • Permits improved shadow curtailment
  • Easy installation and straightforward integration

Turbine misalignment

Wind turbine misalignment and alignment degradation during the operational lifetime of a wind turbine are both common issues that wind farm operators battle with. Since the individual turbines does not have a common reference point, wind farm operators try to solve this issue by performing periodic alignment of wind turbines (either via manual onsite alignment or by using third-party services). However, given the nature of this misalignment, these periodic alignment corrections can be an expensive and unfortunately only temporary solution to the problem.


In the wind energy industry, there is a clear need for more accurate orientation of wind direction sensors to precisely determine the wind direction uncertainty during the development of a wind farm. Since 2017, we have catered some of this need and successfully manufactured and supplied Geovanes for precision alignment of wind vanes for wind resource assessment as well as power performance studies.

During that time period we have also received numerous requests from the industry to adapt the Geovane for it to be used on wind turbines, more precisely in wind plant optimization (wake control and sector management). We have listened to these requests and now have the Geovane ready for mounting on wind turbines. We have called it Geovane WT.

Improved Sector Management

Wind turbine manufacturers and wind farm operators can now take full advantage of the Geovanes unique ability to precisely determine True North using the position of the Sun. The Geovanes patented design is equipped with high-resolution optoelectronic sensors composed of light-sensing pixels and is installed in the back of the turbine nacelle, together with the rest of the sensors that control the turbine. This offers a state-of-the-art approach for referencing wind turbines with respect to True North. Precision orientation of the wind turbine´s nacelle with respect to True North presents several advantages for both active wake control (optimal alignment or misalignment angles) as well as advanced sector management.

Alignment on the nacelle
For the installation and correct alignment with the main turbine axis the Geovane WT is supplied with an alignment collar as well as an optional laser alignment tool.

In the abscense of sunlight, the Geovane will keep the latest valid data obtained since it was powered on. As soon as it receives sufficient radiation from the Sun, Geovane will update its orientation output. This temporary “pause” does not imply any inconvenience due to the nature of the data.

Assuming that the Geovane has been properly aligned with the wind vane by means of its built-in laser, the Geovane will then continuously provide the angular wind vane offset with respect to Geographic North. The user should then apply this offset in the post processing of the dataset.

Yes, the Geovane is fully compatible with any industry standard data logger through the following output options:

  • Frequency ouput 30-130Hz (0-5V square wave)
  • Analog output 0.5-4.5V
  • RS-485 digital ouput

At the moment, the wind vanes compatible with Geovane are: Thies First Class, Thies Compact, Young Wind Monitor, Young Wind Monitor Alpine, Vector W200P, NRG 200P and Ornytion 207P. In the future, it will be possible to extend compatibilty even further.

The Geovane_turbine application offers the exact orientation of the turbine’s nacelle with respect to True North. Aligning all your wind turbines to the same angular reference point enables the wind farm operator to compare yaw turbine alignments.
This means that all the turbine yaw encoders in any given windfarm now have the same reference point.
The Geovane_turbine application is specifically developed for turbine alignment and includes ad hoc hardware and software. It is used as a portable instrument, carried by the O&M team from one wind turbine to another offering once-in-lifetime corrections per turbine.

By adding a new wind vane equipped with a Geovane to an already existing met mast, you are able to correct existing wind direction datasets whitout altering the consistency of previous wind vane measurements.

If the Geovane is installed from the beginning, it is possible to have wind direction datasets inmune to the torsion of the tower structure or bended sensor booms. Throughout the measurement campaign, the Geovane will provide the updated offset, achieving absolute accuracy and greater guarantees to external auditors and financial investors.

No. Any orientation can be used, since the azimuthal Field of View (FOV) of the Geovane is 360°. The Geovane should obviously be perfectly aligned with the e.g. wind vane (see the user manual how to do this).
It is recommended that the wind vane’s cable is positioned in such a way, that it runs down the side of the Geovane facing

In addition to the advantages associated with digital communication and EMI immunity, RS-485 digital output allows the Geovane to provide other useful data apart from the orientation offset: tilt of the sensor, boom vibration, GPS coordinates, UTC time…
A Geovane connected via RS-485 can be used as the GPS module for data loggers and RSD without GPS by default.

Operating voltage6… 36V
Measurement rate1s, 10s, 30s, 60s
Consumption6mA at 12V and 10s (1.5mA at night)
Measurement range0… 360°
ReferenceGeographic North
Field of View (FOV)360° (azimuth) and 62° (elevation)
Accuracy (3σ)0.5°
Digital outputRS-485 (9600, 8N1)
Frequency output10… 130Hz push-pull with 220Ω series resistance
Analog output12-bit resolution 0.5… 4.5V with 220Ω series resistance
Temperature range-25… 85°C
Dimensions180 x Ø80mm (w/o adaptor)
MountingOnto mast tube Ø34mm

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