Influence of wind turbine design parameters on linearized physics-based models in OpenFAST

While most physics involved in wind energy are nonlinear, linearization of the underlying nonlinear wind system equations is often important for understanding the system response and exploiting well-established methods and tools for analyzing linear systems. Linearized models are important for eigen...

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Bibliographic Details
Published in:Wind Energy Science 2022-03, Vol.7 (2), p.559-571
Main Authors: Jonkman, Jason M, Branlard, Emmanuel S P, Jasa, John P
Format: Article
Language:English
Subjects:
Algebra
Controllers
Energy industry
Engineering
Optimization
Physics
Turbines
Wind power
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Summary:While most physics involved in wind energy are nonlinear, linearization of the underlying nonlinear wind system equations is often important for understanding the system response and exploiting well-established methods and tools for analyzing linear systems. Linearized models are important for eigenanalysis (to derive structural natural frequencies, damping ratios, and mode shapes), controls design (based on linear state-space models), etc. In controls co-design, wherein methods often rely on linearized time-domain models of the physics, the physical structure (often called the plant) and controller are designed and optimized concurrently, so it is important to understand how changes to the physical design affect the linearized system. This work summarizes efforts done to understand the impact of design parameter variations in the physical system (e.g., mass, stiffness, geometry, and aerodynamic and hydrodynamic coefficients) on the linearized system using OpenFAST.
ISSN:2366-7443
2366-7451
DOI:10.5194/wes-7-559-2022