On wind farm wake mixing strategies using dynamic individual pitch control

Abstract

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 for wind turbines in a wind farm is increasing, different approaches are being proposed. One such novel approach is called Dynamic Individual Pitch Control (DIPC). In DIPC, each blade pitch angle of a turbine is controlled independently to dynamically manipulate the direction of the thrust force vector exerted on the wind. Hence, the direction of the wake is varied, inducing wake mixing without significant thrust force magnitude variations on the rotor. In this paper, the effectiveness of different variations in the thrust direction are evaluated and compared using Large Eddy Simulation (LES) experiments.

On the Load Impact of Dynamic Wind Farm Wake Mixing Strategies

“…The selected case is identical to the one presented in Ref. [26]. This paper shows that the wake mixing strategies are effective in terms of increasing power generation, which makes the evaluation of the loads in these conditions relevant.…”

“…These conditions are comparable to the operating conditions in Refs. [20,26] and the SOWFA flow simulations presented here. This case therefore enables a comparison between FAST and SOWFA, and can serve to validate the results obtained in the latter.…”

Physics informed DMD for periodic Dynamic Induction Control of Wind Farms

“…In 2020, Frederik et al [6,7] presented the Helix, a new concept that takes advantage of Individual Pitch Control (IPC), historically used for load mitigation, to dynamically vary the fixed-frame tilt and yaw moment to manipulate the wake. We refer to the Helix as a DIPC (Dynamic Individual Pitch Control) strategy.…”

Expert Elicitation on Wind Farm Control

“…The concept demonstrated in simulation by Munters et al [17] was validated by Frederik et al [12] in a set of wind tunnel experiments. More recently, the helix wake mixing concept was introduced by van Wingerden et al [21], where individual pitch control is used to trigger wake mixing [13]. This concept is still to be validated through scaled experiments.…”