Searched for: author%3A%22van+der+Hoek%2C+D.C.%22
(1 - 14 of 14)
document
van Vondelen, A.A.W. (author), Navalkar, S.T. (author), Iliopoulos, Alexandros (author), van der Hoek, D.C. (author), van Wingerden, J.W. (author)
To increase the contribution of offshore wind energy to the global energy mix in an economically sustainable manner, it is required to reduce the costs associated with the production and operation of offshore wind turbines (OWTs). One of the largest uncertainties and sources of conservatism in design and lifetime prediction for OWTs is the...
review 2022
document
Becker, M. (author), Ritter, Bastian (author), Doekemeijer, B.M. (author), van der Hoek, D.C. (author), Konigorski, Ulrich (author), Allaerts, D.J.N. (author), van Wingerden, J.W. (author)
In this paper, a new version of the FLOw Redirection and Induction Dynamics (FLORIDyn) model is presented. The new model uses the three-dimensional parametric Gaussian FLORIS model and can provide dynamic wind farm simulations at a low computational cost under heterogeneous and changing wind conditions.<br/><br/>Both FLORIS and FLORIDyn are...
journal article 2022
document
van der Hoek, D.C. (author), Frederik, J.A. (author), Huang, M. (author), Scarano, F. (author), Ferreira, Carlos (author), van Wingerden, J.W. (author)
Dynamic induction control (DIC) has proven to be an effective method of increasing the power output for a wind farm in both simulation studies and wind tunnel experiments. By pitching the blades of a wind turbine periodically, the recovery of the low-velocity wake is accelerated, thereby increasing the energy available to downstream turbines....
journal article 2022
document
Muscari, C. (author), Schito, P. (author), Viré, A.C. (author), Zasso, A. (author), van der Hoek, D.C. (author), van Wingerden, J.W. (author)
Dynamic Induction Control (DIC) is a novel, exciting branch of Wind Farm Control. It makes use of time-varying control inputs to increase wake mixing, and consequently improve the velocity recovery rate of the flow and the power production of downstream turbines. The Pulse and the Helix are two promising DIC strategies that rely on sinusoidal...
journal article 2022
document
Gonzalez Silva, J. (author), van der Hoek, D.C. (author), Mulders, S.P. (author), Ferrari, Riccardo M.G. (author), van Wingerden, J.W. (author)
Wind turbines are prone to structural degradation, particularly in offshore locations. Based on the structural health condition of the tower, power de-rating strategies can be used to reduce structural loads at the cost of power losses. This paper introduces a novel closed-loop switching control architecture to constrain the thrust in individual...
conference paper 2022
document
Doekemeijer, B.M. (author), van der Hoek, D.C. (author), van Wingerden, J.W. (author)
Wind farm (WF) controllers adjust the control settings of individual turbines to enhance the total performance of a wind farm. Most WF controllers proposed in the literature assume a time-invariant inflow, whereas important quantities such as the wind direction and speed continuously change over time in reality. Furthermore, properties of the...
journal article 2020
document
Fontanella, A. (author), Al, M. (author), van der Hoek, D.C. (author), Liu, Y. (author), van Wingerden, J.W. (author), Belloli, M. (author)
The design of control strategies for floating offshore wind turbines (FOWTs) is even more difficult than for onshore and bottom-fixed offshore ones and a recognized control strategy for FOWTs is currently lacking. In order to design effective control strategies, the additional dynamics of these systems should be taken into account in the...
journal article 2020
document
van der Hoek, D.C. (author), Doekemeijer, B.M. (author), Andersson, Leif Erik (author), van Wingerden, J.W. (author)
In recent years, wake steering has been established as a promising method to increase the energy yield of a wind farm. Current practice in estimating the benefit of wake steering on the annual energy production (AEP) consists of evaluating the wind farm with simplified surrogate models, casting a large uncertainty on the estimated benefit....
journal article 2020
document
Al, M. (author), Fontanella, A. (author), van der Hoek, D.C. (author), Liu, Y. (author), Belloli, M. (author), van Wingerden, J.W. (author)
Floating offshore wind turbines allow wind energy to be harvested in deep waters. However, additional dynamics and structural loads may result when the floating platform is being excited by wind and waves. In this work, the conventional wind turbine controller is complemented with a novel linear feedforward controller based on wave...
journal article 2020
document
Andersson, Leif Erik (author), Doekemeijer, B.M. (author), van der Hoek, D.C. (author), van Wingerden, J.W. (author), Imsland, Lars (author)
This article investigates the optimization of yaw control inputs of a nine-turbine wind farm. The wind farm is simulated using the high-fidelity simulator SOWFA. The optimization is performed with a modifier adaptation scheme based on Gaussian processes. Modifier adaptation corrects for the mismatch between plant and model and helps to...
journal article 2020
document
Engels, W. P. (author), van der Hoek, D.C. (author), Yu, W. (author), Reyes Baez, R. (author)
Many wind turbines are still controlled using gain scheduled, PI(D) controllers. Another option is to use a state feedback controller, such as LQG control. However, for wind turbines that is not straight forward solution, because the system is non-linear and the impact of pitching on the states varies in time. This paper presents a variation...
journal article 2020
document
Doekemeijer, B.M. (author), van der Hoek, D.C. (author), van Wingerden, J.W. (author)
Modern wind farm control (WFC) methods in the literature typically rely on a surrogate model of the farm dynamics that is computationally inexpensive to enable real-time computations. As it is very difficult to model all the relevant wind farm dynamics accurately, a closed-loop approach is a prerequisite for reliable WFC. As one of the few in...
conference paper 2019
document
Aubrun, S. (author), Bastankhah, M. (author), Cal, R. B. (author), Conan, B. (author), Hearst, R. J. (author), van der Hoek, D.C. (author), Huang, M. (author), Hur, C. (author), Karlsen, B. (author)
Nine research teams organized a round-robin measurement campaign of the wake of two porous discs in a homogeneous and "low-turbulent' flow. Mean streamwise velocity and turbulence intensity profiles at four diameters downstream of the discs were measured and compared through such metrics as the maximum of velocity deficit, the maximum of...
journal article 2019
document
van der Hoek, D.C. (author)
Increasing the capacity of offshore wind energy is a necessary step in the transition from fossil fuels to renewable energy sources. In order to accelerate this process, the costs of wind energy should be reduced to make it more competitive with traditional energy sources. Cost reduction could be achieved by increasing the lifetime of an...
master thesis 2017
Searched for: author%3A%22van+der+Hoek%2C+D.C.%22
(1 - 14 of 14)