Model-based Aeroservoelastic Design and Load Alleviation of Large Wind Turbines

Ng, B. F., Hesse, H. , Palacios, R., Graham, J. M. R. and Kerrigan, E. C. (2014) Model-based Aeroservoelastic Design and Load Alleviation of Large Wind Turbines. In: 32nd ASME Wind Energy Symposium, National Harbor, MD, USA, 13-17 Jan 2014, ISBN 9781624103131 (doi: 10.2514/6.2014-0521)

Abstract

This paper presents an aeroservoelastic modeling approach for dynamic load alleviation in large wind turbines with trailing-edge aerodynamic surfaces. The tower, potentially on a moving base, and the rotating blades are modeled using geometrically non-linear composite beams, which are linearized around reference conditions with arbitrarily-large structural displacements. Time-domain aerodynamics are given by a linearized 3-D unsteady vortexlattice method and the resulting dynamic aeroelastic model is written in a state-space formulation suitable for model reductions and control synthesis. A linear model of a single blade is used to design a Linear-Quadratic-Gaussian regulator on its root-bending moments, which is finally shown to provide load reductions of about 20% in closed-loop on the full wind turbine non-linear aeroelastic model.

• Item Type: Conference Proceedings
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Hesse, Dr Henrik
• Authors: Ng, B. F., Hesse, H., Palacios, R., Graham, J. M. R., and Kerrigan, E. C.
• College/School: College of Science and Engineering > School of Engineering
• ISBN: 9781624103131