Abstract

Modeling wind energy conversion systems is a difficult task that requires the use of a unified language gathering all aspect of energies involved such as kinetic energy, mechanical energy, and electrical energy. Bond Graph methodology is an appropriate tool to analyze wind turbine dynamic behavior since the whole system is modelled in the same frame. Herein, a methodology for HAWT's rotor modeling is proposed based on Bond Graph, aerodynamic laws and Rayleigh Beam theory. It takes into consideration the profile, chord, and twist change along the blade. The model is validated using 20-Sim software and then compared to other models from literature. Simulation results show a better value of power coefficient in comparison with works using the same tools.

Highlights

  • Wind energy is extracted from the kinetic energy available in the wind via a conversion system which should be characterized by low environmental impact, low investment, and high yield power generation

  • Simulation results show an increase in power coefficient: CP≈0.4147 compared to [8] where Cp was about 0.33, with 25,6% as difference percentage for the same Horizontal Axis Wind Turbine (HAWT) rotor

  • The model realization using Bond graph (BG) approach allows the estimation of several parameters facilitating the prediction of the system dynamic behavior and efficiency

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Summary

Introduction

Wind energy is extracted from the kinetic energy available in the wind via a conversion system which should be characterized by low environmental impact, low investment, and high yield power generation. This category of energy has recently experienced significant growth and is widely seen as a potential alternative to fight against the greenhouse effect. Many architectures were developed to extract energy from wind. Horizontal Axis Wind Turbine (HAWT) has demonstrated to be a transcendent tool in extracting the energy from wind and is characterized by a higher energy efficiency, less sensitiveness to off-design conditions, and more mechanical stability compared with Vertical Axis Wind Turbine (VAWT). The maximum power that can be extracted is 60%

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