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  • 400 wind turbines already inspected in France/ Alpha Wind a déjà inspectées 400 éoliennes en France 13/07/2018 | 0 comment(s)

  • I met a wind turbine ghost! 07/03/2018 | 0 comment(s)

    Few days ago, I inspected the blade angles of several wind turbines in the north of France and decided to work late until the sunset.

    At the last turbine, I observed a huge relative blade angle difference of 4.4° which was our record so far in France.

                                                 Blade angle profiles

    Tower oscillations

    The wind was above 10m/s and the tower oscillations were important. This extreme defect pushed me to make more measurements of the turbine behavior. The control lasted until I could not see the rotor marks due to the darkness.

    I was totally alone at the site, I packed up my gear in the car and was going to hit the road when I looked at the turbine one last time, I saw this:

    A sudden chill went down my back…. Is that a joke (a ghost…a technician prank…)???? The door was for sure closed when I started the measurement and there was no one at the site the past hours. How could this happen?

    It took me well 10 seconds to realize that the tower vibrations due to the extreme blade angle difference must have made the door open by itself…

    So Wind farm Owners and Operators, if you have self-opening door issues on your wind turbines, a control of the aerodynamic and mass imbalance of the rotor could be a good idea.

  • Inspection of a wind farm with 8 E82 on the behalf of H2AIR in October 2017 05/12/2017 | 0 comment(s)

    [Le saviez-vous ?] Le calage de pale est très important pour l'exploitation éolienne. 1° degré d’écart entre 2 pales cause une perte de production importante et force sur les contraintes mécaniques de la machine. Si la turbine ne fonctionne pas à 100% de son potentiel de production, elle peut s’user prématurément. C'est pourquoi, Laurent Jobart d'AlphaWind est intervenu sur le parc éolien de Miraumont contrôler le calage des pales au moyen d’un système à double laser et d’un logiciel très performant. Sans avoir besoin d'arrêter la turbine, Alpha Wind peut mettre en évidence à 100m de distance un déphasage d’angle de pale.

    https://www.linkedin.com/feed/update/urn:li:activity:6323824283160322048

     

  • 200 wind turbines already inspected in France/ Alpha Wind a déjà inspectées 200 éoliennes en France 05/12/2017 | 0 comment(s)