Vestas Wind Systems A/s

Thorkild Møller Bertelsen

Jesper Lykkegaard Neubauer

Martin Møller Sørensen

Carsten Krogh Nielsen

Morten Bagger Søgaard

Peter Fynbo

Asier Berra

Anders Hjarnø Jørgensen

Tiago Telmo Pinto De Oliveira

The invention relates to a method for controlling a wind turbine system, more particular for a controlled sliding strategy to lower loads on the yaw system by controlling mechanical brakes and motor brakes in the yaw drive actuators. When the yaw system being in the non-yawing operational state, and the mechanical brake(s) being in an engaged state, and the yaw controller determines or receives a signal indicative of a yaw moment, and if the signal indicative of a yaw moment is above a signal threshold, then the yaw controller sends a braking signal to the yaw drive actuators to enter the motors into the brake state to apply a braking torque.

Method for controlling a wind turbine system in relation to braking of the yaw system

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Sabro, Denmark

Thorkild Møller Bertelsen