| 摘要 |
A horizontal axis wind turbine blade configuration is disclosed which can dissipate the energy which would otherwise exceed the capacity of the energy conversion system, when the wind speed and/or the wind turbine rotational speed exceed(s) levels established by the particular design. 'Auxiliary Aerofoil Section(s)' are connected to a wind turbine rotor hub which under particular operating conditions dissipate some of, and under severe conditions dissipate virtually all of, the energy that the conventional wind turbine blade(s) or blade section(s) extract from the wind. The Auxiliary Aerofoil Section(s) are configured to function as a propeller using aerodynamic lift as the principle energy dissipation mechanism when the rotor speed exceeds a certain value for a particular pertaining wind speed, that rotor speed being an outcome of the overall design. The 'Auxiliary Aerofoil Sections" may be provided at the tips of the primary aerofoil sections or separate auxiliary and primary blades may be used on the same hub. Alternatively separate auxiliary and primary rotors may be linked on the same axis or on respective axes.
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