Wind energy systems: Analysis of the self-starting physics of vertical axis wind turbine

The aim of our study is to project an optimized wind turbine Darrieus type capable to start at low wind speeds. This type of the turbine is characterized by a low starting torque compared with the Savonius rotor. To allow them, to operate for a long period, we consider a system enabling a self-start at low wind speeds. The study consist in three parts: first, a system of monitoring and control of the angle of attack that allows a self-starting at low wind speeds is presented, second part presents a general method for obtaining a profile with good starting torque and third part presents experimental study of the impacts of the angle of attack, the solidity and the wind velocity on the lift, grad forces and torque. The study continues to extend to other configurations namely that parabolic shape.