1. 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. 2 Introduction

3. 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. 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. 5 Introduction(cont.) Control Unit –Active or Passive Generator type –synchronous or asynchronous

6. 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. 7 Model simplification of the passive wind turbine system The reference model The equivalent DC model The mixed-reduced model

8. 8 Multiobjective optimization of the passive wind turbine Design veriables:

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

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

11. 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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