Wind Farm Simulation and Layout Optimization in Complex Terrain

Allen, Jeff; King, Ryan; Barter, Garrett

doi:10.1088/1742-6596/1452/1/012066

Wind Farm Simulation and Layout Optimization in Complex Terrain

Journal Article · Mon Mar 02 23:00:00 EST 2020 · Journal of Physics. Conference Series

DOI:https://doi.org/10.1088/1742-6596/1452/1/012066· OSTI ID:1659938

Allen, Jeff ^[1]; King, Ryan ^[1]; ^[1]

National Renewable Energy Lab. (NREL), Golden, CO (United States)

This work reports on incorporating complex terrain into wind farm simulations for the purpose of layout optimization. Adding complex terrain boundary conditions to NREL's medium fidelity Reynolds averaged Navier-Stokes flow model, WindSE, produces significant separation, flow curvature, and speedup effects that would otherwise be difficult to capture with lower-fidelity models or a flat-terrain assumption. These flow features, in turn, can significantly impact the optimal turbine array layout. We demonstrate the addition of complex terrain improves agreement with SCADA data by 34.8% in mean average error. Additionally, we discuss modifications to the code that enable gradient-based layout optimization using terrainaware adjoints with arbitrary topography. Through several optimization case studies, we show that the layout optimization process takes advantage of speedup effects on terrain high points, and leverages flow curvature effects that modify wake trajectories. This yields substantial power improvements over gridded layouts, and hints at future research directions in simulation and optimization for wake trajectories in complex terrain.

View Accepted Manuscript (DOE)

Research Organization:: National Renewable Energy Laboratory (NREL), Golden, CO (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Wind Energy Technologies Office

Grant/Contract Number:: AC36-08GO28308

OSTI ID:: 1659938

Alternate ID(s):: OSTI ID: 1603879

Report Number(s):: NREL/JA-2C00-77146; MainId:26092; UUID:c7e7a9ed-19c2-4e9f-b039-26113e420f4c; MainAdminID:13665

Journal Information:: Journal of Physics. Conference Series, Journal Name: Journal of Physics. Conference Series Vol. 1452; ISSN 1742-6588

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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