A comparison of dynamic inflow models for the blade element momentum method

With the increase in rotor sizes, the implementation of innovative pitch control strategies, and the first floating solutions entering the market, the importance of unsteady aerodynamic phenomena in the operation of modern offshore wind turbines has increased significantly. Including aerodynamic unsteadiness in blade element momentum (BEM)...

Surrogate based sensitivity analysis and uncertainty quantification of floating wind turbine mooring systems

CFD modelling of tilted rotors

A comparison of dynamic inflow models for the Blade Element Momentum method (Preprint)

With the increase in rotor sizes, the implementation of innovative pitch control strategies, and the first floating solutions entering the market, the importance of unsteady aerodynamic phenomena in the operation of modern offshore wind turbines has increased significantly. Including aerodynamic unsteadiness in Blade Element Momentum (BEM)...

An engineering modification to the blade element momentum method for floating wind turbines

The design of next-generation offshore wind rotors for floating applications carries large uncertainties that make it harder to bring costs down. A significant share of this uncertainty is associated with the use of Blade Element Momentum (BEM) methods to run aeroelastic design and loadcase calculations, because the assumptions underlying the...

Challenges in dynamic modeling of future wind energy systems

Active wake control: An approach to optimize the lifetime operation of wind farms

The wind turbines within a wind farm impact each other's power production and loads through their wakes. Wake control strategies, aiming to reduce wake effects, receive increasing interest by both the research community and the industry. A number of recent simulation studies with high fidelity wake models indicate that wake mitigation control is...

S4VAWT final report

This TKI-WoZ R&D project with partners GustoMSC, EOLFI, TU Delft, WMC, MARIN and ECN, investigated the optimization of a floating support structure for a Vertical Axis Wind Turbine (VAWT). Due to their low center of gravity and ability to handle vertical inclination, VAWTs have potential for floating application. Supported by the prediction and...

LiDAR Application for Wind Energy Efficiency, Final report

ECN with its partners TU Delft, Avent LiDAr Technologies and XEMC Darwind executed the four-year TKI Wind op Zee project LAWINE (LiDAr Application for WInd Energy Efficiency). In this project the application of LiDAR technology has been developed and validated so that it can be used to improve the operation of offshore wind farms with the goal...

S4VAWT Floating vertical axis wind turbines with pitched blades

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Effects of rotor induction on the propagation of disturbances towards wind turbines

Within the framework of the LAWINE project (LiDAR Applications for Wind Farm Efficiency), the application of LiDAR for optimization of turbine control is researched. The evolution of turbulent structures as they approach a wind turbine is critical in order to link turbine loads to free-stream turbulence with special attention given to Taylors...

Active Wake Control: Loads trends

Active Wake Control (AWC) is a strategy, developed and patented by ECN, for operating wind farms in an economically optimal manner. It makes use of the wake interactions between the wind turbines to maximize the power production of the whole wind farm and/or reduce the loading of the individual wind turbines. The wakes are controlled by either...

Control development for floating wind

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ACT: Advanced Control Tool by ECN

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PROcedures for TESTing and measuring wind turbine components results for yaw and pitch system and drive train

PROcedures for TESTing (PROTEST) and measuring wind energy systems) was a pre-normative project that ran from 2008 to 2010 in order to improve the reliability of mechanical components of wind turbines. Initiating the project, it was concluded that the procedures concerning these components should be further improved. Within the PROTEST project,...

Aero-elastic simulation of offshore wind turbines in the frequency domain

The design and analysis of offshore wind turbines is a difficult task compared to onshore, due to the numerous load cases that have to be considered and the calculation work involved. Not only the amount of sea states to deal with at a specific site, but also the differences between sites and even between locations within a wind park should be...