By D-P. Molenaar
During this thesis a layout device has been built that gives the chance to generate actual and trustworthy dynamic versions of the whole wind turbine. The versions could be both used to guage the impression that layout offerings have at the monetary viability, or to evaluate the dynamic habit of the chosen wind turbine configuration lower than quite a few stipulations.
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Additional info for Cost-Effective Design and Operation of Variable Speed Wind Turbines: Closing the Gap Between the Control Engineering and the Wind Engineering Community
Before we can solve this ﬁrst sub-problem, it should be clear what is demanded from the model. We aim at developing models suited for the cost-eﬀective design and operation of ﬂexible, variable speed wind turbines. This implies that we are mainly interested in the complete wind turbine behavior (including all bilateral couplings between the diﬀerent wind turbine parts) as well as the interactions with 13 the surroundings. g. rotor blades, generator or power converter) although an unambiguous exchange of data between the two must be possible.
4 times the value for which Cp,max is achieved . For a constant rotational speed wind turbine this implies that it occurs at wind velocities much lower than the rated wind velocity, while for a variable speed wind turbine it may not occur at all during normal operation. 1: Thrust coeﬃcient Cdax as function of axial induction factor a. Solid curve: Johnson, dashed curve: Garrad Hassan, dashed-dotted straight line: Anderson, ∗: transition point, dotted straight line: Wilson, o: junction point, dashed-dotted curve: Glauert.
Still, this requires supercomputers, and is usually not justiﬁed for practical engineering use. Therefore, in wind engineering, empirical information is generally used in the methods developed for the simulation of turbulent wind. All these methods use, as a starting point, auto-spectral and coherence descriptions of the turbulence. There are several of such descriptions available with the most common being the Von K´ arm´an and Kaimal spectral models. A more comprehensive method is that due to Mann [173, 174] developed at Risø National Laboratory, Denmark.
Cost-Effective Design and Operation of Variable Speed Wind Turbines: Closing the Gap Between the Control Engineering and the Wind Engineering Community by D-P. Molenaar