Impact on wind turbine loads from different down regulation control strategies

Christos Galinos, Torben J. Larsen, Mahmood Mirzaei

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Three characteristic derating strategies on the upstream wind Turbine are studied and the load impact to the downstream one is assessed. These are defined as minimum/maximum rotor speeds (minRS, maxRS) and minimum thrust (minT) modes. Derating factors of 20% and 40% on available power are applied together with 4 and 7 diameters WT interspace. The study is based on aeroelastic simulations of a 2MW generic WT model including wake effects. The results show that below rated wind speed (8m/s) the downstream WT blade flap fatigue loads are minimized when the upfront WT is derated with the minRS strategy. The maxRS mode returns always the highest loads. When the WTS are aligned with the wind direction (full wake situation) the load levels for minRS and mint strategies are almost equal. Above rated wind speed (16m/s) the tendency is the same as at 8m/s. Finally, the fore-aft fatigue loads on the tower base and the main bearing yaw moment follow the same trends as the blade for both below and above rated wind speed.
Original languageEnglish
Publication date2018
Number of pages1
Publication statusPublished - 2018
Event15th Deep Sea Offshore Wind R&D Conference - Trondheim, Norway
Duration: 17 Jan 201819 Jan 2018
Conference number: 15


Conference15th Deep Sea Offshore Wind R&D Conference

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