A method for preventing mechanical oscillation in a wind power plant
includes determining wind speed, controlling a generator of the power
plant with speed control when the wind speed is below a predefined limit
to maintain the rotation speed of the generator below a predefined first
limit, detecting the increase of wind speed above the predefined limit,
controlling the electric drive of the wind power plant generator to
torque control by using a predefined crossover torque in response to the
wind speed increasing above a predefined limit, maintaining the crossover
torque as the reference torque for the electric drive until the rotation
speed of the generator has increased above a predefined second limit, and
controlling the electric drive of the wind power plant generator with
torque control while the rotation speed of the generator remains above
the predefined second limit.