1 Model simplification and optimization of a passive wind turbine generator B. Sareni*, A. Abdelli, X. Roboam, D.H. Tran Speaker: Kuo-Hsien Chuang Date: 2009/11/24

2 Introduction

3 Introduction(cont.) Rotor diameter –A larger rotor captures more energy but cost more. Generator capacity –The rotor diameter and generator capacity must match one another

4 Introduction(cont.) Hub height –Wind speeds increase with hub height but so does the tower cost. Rotor blade design –The blades have a slight twist which can be optimized to capturethe maximum amount of wind power.

5 Introduction(cont.) Control Unit –Active or Passive Generator type –synchronous or asynchronous

6 The small passive wind turbine system minimize the system cost and to maximize its reliability A minimum number of sensors and no control unit is required in this ‘‘low cost’’ structure. poor energetic efficiency

7 Model simplification of the passive wind turbine system The reference model The equivalent DC model The mixed-reduced model

8 Multiobjective optimization of the passive wind turbine Design veriables:

9 Multiobjective optimization of the passive wind turbine(cont.) Objectives: –minimizing the total embedded mass of the system. –Maximize the useful power

10 Multiobjective optimization of the passive wind turbine(cont.) Constraints:

11 The optimization process NSGA-II Pareto-dominance rule: –Non-feasible v.s. Non-feasible –Feasible v.s. Non-feasible –Feasible v.s. Feasible

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