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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
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Gonzalez Silva, J. (author), Doekemeijer, B.M. (author), Ferrari, Riccardo M.G. (author), van Wingerden, J.W. (author)Active power control regulates the total power generated by wind farms with the power consumed on the electricity grid. Due to wake effects, the available power is reduced and turbulence is increased at downstream wind turbines. Such effects lead to a design challenge for wind farm control, where the delicate balance between supply and demand...conference paper 2021
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Doekemeijer, B.M. (author), Kern, Stefan (author), Maturu, Sivateja (author), Kanev, Stoyan (author), Salbert, Bastian (author), Schreiber, Johannes (author), Campagnolo, Filippo (author), Bottasso, Carlo L. (author), Schuler, Simone (author), van Wingerden, J.W. (author)The concept of wake steering on wind farms for power maximization has gained significant popularity over the last decade. Recent field trials described in the literature not only demonstrate the real potential of wake steering on commercial wind farms but also show that wake steering does not yet consistently lead to an increase in energy...journal article 2021
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Doekemeijer, B.M. (author)Open-loop wake steering inconsistently improves the energy yield of wind farms in field experiments in the literature. This thesis matures wind farm control technologies for power maximization in a model-based closed-loop framework towards real-world practical applicability. Firstly, open-loop wake steering is evaluated on a commercial onshore...doctoral thesis 2020
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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
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Doekemeijer, B.M. (author), van Wingerden, J.W. (author)Wind farm control (WFC) algorithms rely on an estimate of the ambient wind speed, wind direction, and turbulence intensity in the determination of the optimal control setpoints. However, the measurements available in a commercial wind farm do not always carry sufficient information to estimate these atmospheric quantities. In this paper, a...journal article 2020
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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
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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
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Frederik, J.A. (author), Doekemeijer, B.M. (author), Mulders, S.P. (author), van Wingerden, J.W. (author)Dynamic wind farm control is a new strategy that aims to apply time-varying, often periodic, control signals on upstream wind turbines to increase the wake mixing behind the turbine. As a result, wake recovery is accelerated, leading to a higher power production of downstream turbines. As the amount of interest in dynamic control strategies...journal article 2020
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van Wingerden, J.W. (author), Fleming, P. A. (author), Göcmen, T. (author), Eguinoa, I. (author), Doekemeijer, B.M. (author), Dykes, K. (author), Lawson, M. (author), Simley, E. (author), King, J. (author)Wind farm control is an active and growing field of research in which the control actions of individual turbines in a farm are coordinated, accounting for inter-turbine aerodynamic interaction, to improve the overall performance of the wind farm and to reduce costs. The primary objectives of wind farm control include increasing power...journal article 2020
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Frederik, J.A. (author), Doekemeijer, B.M. (author), Mulders, S.P. (author), van Wingerden, J.W. (author)Wind farm control using dynamic concepts is a research topic that is receiving an increasing amount of interest. The main concept of this approach is that dynamic variations of the wind turbine control settings lead to higher wake turbulence, and subsequently faster wake recovery due to increased mixing. As a result, downstream turbines...journal article 2020
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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
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Boersma, S. (author), Doekemeijer, B.M. (author), Keviczky, T. (author), van Wingerden, J.W. (author)Active power control for wind farms is needed to provide ancillary services. One of these services is to track a power reference signal with a wind farm by dynamically de- and uprating the turbines. Due to the stochastic nature of the wind, it is necessary to take this stochastic behavior into account when evaluating control signals. In this...conference paper 2019
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Doekemeijer, B.M. (author), Fleming, Paul A. (author), van Wingerden, J.W. (author)In wind farms, wake interaction leads to losses in power capture and accelerated structural degradation when compared to freestanding turbines. One method to reduce wake losses is by misaligning the rotor with the incoming flow using its yaw actuator, thereby laterally deflecting the wake away from downstream turbines. However, this demands...conference paper 2019
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Boersma, S. (author), Doekemeijer, B.M. (author), Siniscalchi-Minna, S. (author), van Wingerden, J.W. (author)Active power control for wind farms is needed to provide ancillary services. One of these services is to track a power reference signal with a wind farm by dynamically de- and uprating the turbines. In this paper we present a closed-loop wind farm controller that evaluates 1) thrust coefficients on a seconds-scale that provide power tracking...journal article 2019
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Mendez Reyes, Hector (author), Kanev, Stoyan (author), Doekemeijer, B.M. (author), van Wingerden, J.W. (author)Wake redirection is an active wake control (AWC) concept that is known to have a high potential for increasing the overall power production of wind farms. Being based on operating the turbines with intentional yaw misalignment to steer wakes away from downstream turbines, this control strategy requires careful attention to the load...journal article 2019
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Boersma, S. (author), Rostampour, Vahab (author), Doekemeijer, B.M. (author), van Geest, W.J.M. (author), van Wingerden, J.W. (author)The objective of active power control in wind farms is to provide ancillary grid services. Improving this is vital for a smooth wind energy penetration in the energy market. One of these services is to track a power reference signal with a wind farm by dynamically de- and uprating the turbines. In this paper we present a computationally...conference paper 2018
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Doekemeijer, B.M. (author), Boersma, S. (author), Pao, L. Y. (author), van Wingerden, J.W. (author)Wind farm control research typically relies on computationally inexpensive, surrogate models for real-time optimization. However, due to the large time delays involved, changing atmospheric conditions and tough-to-model flow and turbine dynamics, these surrogate models need constant calibration. In this paper, a novel real-time (joint state...conference paper 2018
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Raach, Steffen (author), Boersma, S. (author), Doekemeijer, B.M. (author), van Wingerden, J.W. (author), Cheng, Po Wen (author)This work presents the next step in realizing lidar-based closed-loop wake redirection control. Lidar-based closed-loop wake redirection aims at repositioning the wake at a desired position by yawing the wind turbine. The actual wake deflection is derived from lidar measurements and used in a closed-loop control scheme. Compared to an open...conference paper 2018
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Boersma, S. (author), Rostampour, Vahab (author), Doekemeijer, B.M. (author), van Wingerden, J.W. (author), Keviczky, T. (author)In this paper, we present an implementation of a model predictive controller (MPC) for wind farm power tracking problem. The controller is evaluated in the high-fidelity PAral-lelized Large-eddy simulation Model (PALM). By taking measurements from PALM, we show that the closed-loop MPC can provide power reference tracking while reducing force...journal article 2018
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