Modelling and simulation of the wake effect in a wind farm

Abstract

A wind farm is a collection of a few tens or a few hundreds of wind turbine generator installed in close vicinity. There is a need for further research to examine the performance of wind farm and wake models in difficult environments. This paper deals with the modelling of the wake effect in wind farms using real time digital simulator. There are many different models to analyse the wake effect. Jensen model is one of the widely used wake models at the moment. The model is simpler and requires a short time for calculations. Power loss of the modelled wind farm with the wake effect is analysed under the effects of wind direction and the wind speed time delay. The modelling of a wind farm for wake effect simulation is described and some exemplary simulations are also performed to show the influence of wake effect.

Techno-economic design of wind farms: a multi-scenario cost-based application

“…c t acts as a function of an axial induction factor indicating how much the energy extracted from the turbine affects the fluid flow. The thrust coefficient can be calculated according to (7) (Hwang et al, 2015).…”

“…Where u min is the cut-in speed and u max is the cut-out speed of the wind turbine (Hwang et al, 2015).…”

A Multiagent Reinforcement Learning Approach for Wind Farm Frequency Control

“…7. Although we use different control policies during frequency regulation, the change in wake of one WT does not affect the other WTs during this period (20-30s seconds for primary frequency control [33]), as the wake propagation time between neighbouring WT rows is about 100 seconds for common configurations and wind speeds [34].…”

Evaluation of an Offshore Wind Farm by Using Data from the Weather Station, Floating LiDAR, Mast, and MERRA

“…In this study, the Park Optimizer module of WindSim was applied using computational fluid dynamics (CFD) results and optimization algorithms to optimize the design of IEC-compliant wind farm layouts [28,29]. The Jenson model was used as the wake model, and the decay coefficient k d set to 0.05 for the offshore condition [30]. The module sets the limitation for turbines based on the terrain condition, inflow angle, turbulence intensity, and velocity and then determines the interturbine distance required to avoid the wake effect.…”