Create a tool for the design of turbines in a wind farm and for development of wake control algorithms. This tool is based on turbine-response calculations with time-related modelling of wake interaction.
Most wind energy is generated by turbines in a wind farm. Currently design requirements for wind turbines (IEC, GL and DNV) are basically formulated for wind loading on stand-alone turbines. Following IEC 61400-3 the effect of wake operation for wind turbines can be modelled with an engineering approach for increased turbulence.
Recently more detailed models have come under development for unsteady wind farm wake effects, including the 'meandering' motion. These models are named Dynamic Wake Meandering (DWM) models. Research and development have started for wind turbine controllers that aim to reduce the consequences of wake effects on turbines in a wind farm. DWM models and wake control algorithms cannot yet be included in an integral way in the conventional process of design load calculations as required for certification.
With the farm wake simulation tool developed in this project the aeroelastic response of the individual wind turbine is calculated in the same way as is common practice for wind turbine certification. This means that it still conforms to the latest IEC 61400-1 ed.3 and IEC 61400-3 ed.1 design requirements. In contrast to similar developments, the aerodynamic interaction in terms of transportation and deformation of the wake through a wind farm is modelled including time-dependent variations of the wake strength and side momentum.
The transportation of the wake is modelled using an engineering DWM model that describes the wind deficit in the wake of another turbine, added turbulence, and wake meandering. This implementation allows for various algorithms for wake development. On this basis an add-on is created for the ECN program FarmFlow which will be used for benchmarking.
Project partners: WMC, ECN
Consulting partner: XEMC Darwind
Period: January 2015 - December 2015
Project partially funded by: FLOW (project P201406-003-WMC)
Project coordinator: Koert Lindenburg (WMC)
For inquiries please contact:
Knowledge Centre WMC
1771 MV Wieringerwerf
phone +31(0)227-50 49 49