Control system and method for mitigating rotor imbalance on a wind turbine

摘要

A wind turbine includes multiple blades, multiple Micro Inertial Measurement Units (MIMUs) for sensing parameter signals of the blades, and a control system. The control system includes a blade bending moment calculation unit, a blade bending moment error signal calculation unit, and a pitch angle compensation command calculation unit. The blade bending moment calculation unit is used for calculating blade bending moment values of the blades based at least on the sensed parameters. The blade bending moment error signal calculation unit is used for calculating blade bending moment error signals of the blades based on the calculated blade bending moment values of the blades and multiple blade bending moment commands. The pitch angle compensation command calculation unit is used for calculating pitch angle compensation commands of the blades based on the calculated blade bending moment error signals to adjust pitch angles of the blades respectively.

主权项

1. A control method for mitigating rotor imbalance on a plurality of blades of a wind turbine, the method comprising:
sensing parameter signals of the plurality of blades through a plurality of Micro Inertial Measurement Units (MIMUs), wherein at least one of the MIMUs is physically configured on each of the blades such that the signals from the MIMUs are in response to one or more real-time actual physical conditions induced on the blades; calculating blade bending moment values of the plurality of blades based at least on the sensed parameters; calculating blade bending moment error signals of the plurality of blades based on the calculated blade bending moment values of the plurality of blades and a plurality of blade bending moment commands; calculating pitch angle compensation commands of the plurality of blades based on the calculated blade bending moment error signals; and using the pitch angle compensation commands to adjust pitch angles of the plurality of blades to compensate for the real-time bending moments induced on the blades as sensed by the MIMUs.