Aerodynamics and wind-field models for wind turbine control

  • Maria Lourdes Gala Santos

Student thesis: Doctoral Thesis

Abstract

The aerodynamics of a wind turbine (WT) exhibit a particular property which is important for the design of control systems for WTs. It is referred to here as Separability. In this thesis, the Separability property of the wind turbine’s aerodynamics is explored in much greater detail than before. Based on Separability, a novel effective wind-field model with potential for broad application in advanced wind turbine control is developed and validated against Bladed.The Separability property is thoroughly investigated for constant speed WTs and variable speed WTs. The procedure to obtain the best possible representation of the aerodynamics in terms of its separated form, is developed. This process entails two aspects, firstly to determine the functional nature of the most appropriate representation and secondly to optimise the parameters of the fits. It has been demonstrated that Separability exists in both constant and variable speed WTs and that it holds for a very large neighbourhood with a very good accuracy. In fact, on average, it comfortably covers more than double the rated torque of all the WTs explored. The Separability property is exploited to develop effective wind-field models in the form of lump parameter ordinary differential equation models that are used in the modelling of WTs. These have been thoroughly validated against Bladed.
Date of Award1 Oct 2013
LanguageEnglish
Awarding Institution
  • University Of Strathclyde
SponsorsEPSRC (Engineering and Physical Sciences Research Council)
SupervisorWilliam Leithead (Supervisor) & Hong Yue (Supervisor)

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