TNO Energy Transition, Wind Energy, Westerduinweg 3, 1755LE Petten, Netherlands
Abstract. Active Wake Control (AWC) is a strategy for operating wind farms in a way to maximize the overall power production and/or reduce structural loading on the wind turbines. Many recent studies indicate that this technology, and more specifically the so-called wake redirection approach to AWC, have a significant potential for increasing the annual energy production by up to a few percentage points. The current state-of-the-art approach is to optimize AWC for a range of static wind conditions, which is expected to perform sub-optimally in real-life due to the continuous variations of the wind resource and the very slow yaw dynamics of the turbines. Recent work has addressed this variability in a robust design setting with the focus on maximizing the energy capture (robust AWC). This paper continues on this line of research, and develops a dynamic robust AWC strategy that aims to optimize the balance between maximum power production (requiring increased level of yawing) and minimum loads on the yaw drive (requiring limited yaw motion). It is shown with a realistic case study that the developed dynamic robust AWC can result in a large reduction of the loading on the yaw drive while at the same time improving the overall power gain, as compared to the conventional nominal AWC.
This preprint has been withdrawn.
How to cite. Kanev, S. and Bot, E.: Dynamic robust active wake control, Wind Energ. Sci. Discuss. [preprint], https://doi.org/10.5194/wes-2021-71, 2021.
Active Wake Control (AWC) is a strategy for operating wind farms in a cooperative manner to maximize the overall power production. The state-of-the-art approach optimizes AWC for static wind conditions, which is sub-optimal in real-life due to the continuous variations of the wind resource and the very slow dynamics of the yaw system that controls the rotor direction. This work develops dynamic robust AWC that considers realistic operating conditions including variabilities and uncertainties.
Active Wake Control (AWC) is a strategy for operating wind farms in a cooperative manner to...
Firstly, I want to say that I very much enjoyed reading your publication. You tackle a very important topic and present multiple valuable contributions to the literature. Specifically, this paper innovates by presenting a dynamic variant of their in-house FarmFlow model, the authors present a sensitivity analysis concluding that four parameters (wind direction, wind speed, yaw error and turbulence intensity) are the most important parameters to consider in robust optimization, the authors present various guidelines for the inclusion of dynamics in wind farm controllers, and finally present a simulation study using the OWEZ offshore wind farm. Moreover, I specifically enjoyed the strong literature review, I appreciate the concept of presenting wind direction variability as being directly correlated with turbulence intensity, and very much enjoyed the strong analysis on pages 22-24. I think the scientific significance and quality are both excellent.
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