Control method and apparatus for wind turbine generator set, and device

A computer-readable storage medium storing a computer program, wherein the computer program, when executed by a processor, implements:

• obtaining a mapping of the wind turbine, wherein the mapping of the wind turbine comprises a mapping of hub thrust under an exceeded power, a mapping of turbine power under the exceeded power, and a limit boundary of hub thrust;
• determining a starting power for starting an advance pitch control based on the mapping of the wind turbine;
• in response to a rotation speed of the wind turbine reaching a first rated rotation speed and a power of the wind turbine reaching the starting power,
• increasing a motor torque to maintain the wind turbine at the first rated rotation speed and increase the power of the wind turbine, and
• increasing a pitch angle based on a first calibrated relationship between the power of the wind turbine and the pitch angle, to make the hub thrust of the turbine change by following the limit boundary of hub thrust;
• and
• increasing the pitch angle to maintain the rotation speed of the wind turbine at the first rated rotation speed until a target wind speed is reached, in response to the power of the wind turbine being increased to the exceeded power.

A device for controlling a wind turbine, comprising:

• at least one processor;
• and
• at least one memory storing a computer program, wherein the computer program, when executed by the at least one processor, implements:
• obtaining a mapping of the wind turbine, wherein the mapping of the wind turbine comprises a mapping of hub thrust under an exceeded power, a mapping of turbine power under the exceeded power, and a limit boundary of hub thrust;
• determining a starting power for starting an advance pitch control based on the mapping of the wind turbine;
• in response to a rotation speed of the wind turbine reaching a first rated rotation speed and a power of the wind turbine reaching the starting power,
• increasing a motor torque to maintain the wind turbine at the first rated rotation speed and increase the power of the wind turbine, and
• increasing a pitch angle based on a first calibrated relationship between the power of the wind turbine and the pitch angle, to make the hub thrust of the turbine change by following the limit boundary of hub thrust;
• and
• increasing the pitch angle to maintain the rotation speed of the wind turbine at the first rated rotation speed until a target wind speed is reached, in response to the power of the wind turbine being increased to the exceeded power.