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AssigneeVestas Wind Systems A/S
InventorsMartin Ansbjerg Kjær, Peter Koldkjær, Rasmus Molgaard Hviid Knudsen, Maryam Soleimanzadeh, Martin Møller Sørensen, Ali Zaib, Arvishwa Kumar Singh, Poul Brandt Christensen, Michael Houlind Jensen
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To efficiently nm a wind turbine in varying wind speeds, the wind turbine may be configured to switch between two different electrical configurations that offer different efficiencies depending on wind speed. For example, a star configuration may be preferred during low wind speeds while a delta configuration is preferred for high wind speeds. Before switching, the power output by the turbine's generator may be driven to zero. Doing so, however, removes load from the rotor blades which cause the rotor speed to increase. Instead, the rotor speed may be controlled such that the speed stays at or above the speed of the rotor immediately before the generator power is ramped down. Maintaining rotor speed at or slightly above the current speed while switching between electrical configurations may mitigate the torque change experienced by the turbine and reduce the likelihood of structural failure.
A controller for a wind turbine, the controller comprising control logic configured to:
A wind turbine, comprising:
A method for controlling a wind turbine, the method comprising:
Dependencies are inferred from the claim text.