Patent ID: 8659178
Filing Date: 2014-02-25
Classification: F03D,H02P,Y02E

Abstract:
1. A method for controlling a wind turbine of variable speed, the method comprising: calculating an initial instruction based on a turbine operating state, the initial instruction comprising one of: an initial torque instruction and initial power instruction; calculating an adjustment term associated with dampening vibration modes of a turbine transmission system, the adjustment term comprising one of: a torque adjustment term and a power adjustment term; estimating a maximum evacuable active power based at least in part on a voltage of a power grid and an active current limit of the wind turbine; applying a limit value to the initial instruction, the limit value being based at least in part on the maximum evacuable active power, wherein applying the limit value to the initial instruction further includes: calculating a final instruction, the final instruction comprising one of: a final torque instruction and a final power instruction, wherein calculating the final instruction comprises applying the adjustment term to the initial instruction; and employing the final instruction in controlling the wind turbine.