Growth through Research, development & demonstration in Offshore Wind


Dynamic Wind Farm Flow Control

Minimising wake effects for wind farms by closed-loop active wake steering and novel active wake mixing technology

Screenshot of the Dynamic Wind Farm Flow Control project website Please, have a look at the Dynamic Wind Farm Flow Control project website


By extracting kinetic energy from the wind flow, a wind turbine reduces the wind speed in a wake that forms downstream of the wind turbine rotor. In a wind farm, in which turbines are placed relatively close to each other, this wake effect can reduce the power production of downstream turbines.

Nowadays, in wind farms, wind turbines operate on an individual level in which each wind turbine optimises its power production. Existing algorithms for wind farm flow control, primarily through wake steering, are based on steady-state engineering models that neglect the dynamics of the wind farm. This results in sub-optimal power output at wind farm level. Flow or wake control, coordinated by a wind farm controller, will result in a higher energy yield of the wind farm.


Innovation project ‘Dynamic Wind Farm Flow Control’ aims to take the crucial next step in the effort to minimise wake effects for modern wind farms like Hollandse Kust Noord in time-varying atmospheric conditions. The project will further develop and implement closed-loop active wake steering (based on yaw control) in combination with the novel HELIX active wake mixing technology. The main goal is to mature these technologies and demonstrate these at the offshore wind farm Hollandse Kust Noord. We will demonstrate that by including the dynamic flow control a larger potential power output can be gained.

The HELIX technology will be explored in more depth using desktop and computational studies. We will make use of high-fidelity computational fluid dynamics studies and detailed loads analysis. These modelling results will be compared with results from wind tunnel experiments. The HELIX technology is subsequently tested experimentally at an onshore research wind turbine. When successful, the HELIX technology will be implemented at one of the SG 11.0-200 DD wind turbines at Hollandse Kust Noord wind farm. In parallel, the closed-loop active wake steering technology will be demonstrated at the wind farm. As a result, both technologies will be matured from TRL3 to TRL7.

The final phase of the project focuses on the potential impact when these control technologies are rolled out across the full wind farm and how these control technologies can impact the design and power production of future wind farms.


In this project, we will unleash the true potential of the novel HELIX active wake mixing concept by detailed experiments and field trials, while the closed-loop wind farm control technology is further matured. The technology maturation and validations are of crucial importance for the wide adoption of the concept by wind farm developers and operators. It has the potential to further drive down the LCOE of wind and improve the controllability of the flow.

We expect the project to result in three major improvements.

Contact Details

TU Delft

Jan-Willem van Wingerden
T +31 15 278 1720


Maria Kalogera

Technology Readiness Level

Maturity level: 3.
        3 4 5 6 7

Project duration


O&M Wind farm optimisation
Wind farm of Eneco magnify Wind farm of Eneco

Wind farm of Eneco


Wind farm of Eneco

Dynamic Wind Farm Flow Control magnify Dynamic Wind Farm Flow Control

Dynamic Wind Farm Flow Control


Dynamic Wind Farm Flow Control


On the performance of the helix wind farm control (Wake Conference, 2023)

A new coupling of a GPU-resident large-eddy simulation code with a multi-physics wind turbine simulation tool (Journal of wind energy, 2023)

Enhanced wake mixing in wind farms using the Helix approach: A loads sensitivity study (Abstract, American Control Conference, 2023)

Enhancing Wake Mixing in Wind Farms by MultiSine Signals in the Helix Approach (Abstract, American Control Conference, 2023)

A flexible wind tunnel page 16-19 (Offshore Industry, 2023)

TU Delft wants to know which way the wind blows AD Newspaper, 2023)

TU Delft test oplossingen voor zog-effect op windpark Hollandse Kust Noord (Schuttevaer, 2022)

Interview with Jan-Willem van Wingerden about the Windshape Lab, (Radio 1, 2022)

Windtunnel met 1500 ventilatoren om windmolens te testen TV West (October 2022)

TU Delft opens globally unique wind tunnel (TU Delft, 2022)

The Next Airbender (GROW webmagazine, 2022)

Deel 1 Windmakers met Jan Willem van Wingerden (NWEA-Windmakers, 2022)

Gejaagd door de wind (Shell, 2022)

Enhancing Wake Mixing in Wind Farms by MultiSine Signals in the Helix Approach (Thesis - repository TU Delft, 2022)

Energy snack (TU Delft / CrossWind, 2021)

Other information

GROW-to-GO podcast logopodcast & article | 20 Sep 2022 The Next Airbender


Associate project partner