Inter Farm Interactions and Hub Height Optimization for Onshore Wind Farms

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Gökay Kütükcü tez-19.09.2022.pdf

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2022-9

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Kütükcü, Gökay

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This thesis presents the results of an investigation that focuses on finding the optimum tower height distributions for two interacting on-shore wind farms that are located on a complex terrain. Four different optimization scenarios are studied based on two different definitions of objective functions, which take into account both the power production capacity and the relevant cost variations due to changing hub heights. The study is based on simulations using the FLORIS framework, which is modified such that existing significant variations in hub height levels due to elevation differences for the studied on-shore wind farms, hence partial wake interactions that are occurring as a consequence, are more realistically represented. Results show that when both wind farms are included in the optimization process and if the cost parameters are not included in the objective function definition, the optimization process tends towards increasing the hub height levels of the turbines in the upstream wind farm to benefit from increased wind speeds at higher hub heights. However, when the cost parameters are included, the optimization both tries to reduce wake interaction effects while increasing hub heights of the turbines that are not interacting with the downstream wind farm. When only the downstream wind farm is included in the optimization process but if the cost cost parameters are not included, the optimized results show that hub heights of all of the most influential turbines get increased. However when the cost parameters are included, the optimized results show that the hub heights of the partially interacting turbines get decreased and those that are operating under stronger cluster-wake effects get increased.

Subject Keywords

Hub Height Optimization, FLORIS, Wind Turbine Wake, Wind Farm Interaction, Cluster wake

URI

https://hdl.handle.net/11511/99384

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

G. Kütükcü, “Inter Farm Interactions and Hub Height Optimization for Onshore Wind Farms,” M.S. - Master of Science, Middle East Technical University, 2022.