Control method and device for wind power generating set

Abstract

The invention discloses a control method and equipment used for a wind power generator set. The method comprises the following steps: detecting a wind wheel angle speed, power generator output power and a pitch angle; setting a blade tip speed; determining a wind energy utilization coefficient according to the pre-set blade tip speed and the detected pitch angle; determining a power error according to the pre-set blade tip speed, the detected power generator output power and wind wheel angle speed, the wind energy utilization coefficient, wind wheel rotation inertia, air density, a wind wheel diameter and a wind blowing area; if the power error exceeds an allowable power error range, setting the blade tip speed again and determining the wind energy utilization coefficient and the power error again until the power error is in the allowable power error range; if the power error is in the allowable power error range, determining a wind speed according to the pre-set blade tip speed, the detected wind wheel angle speed and the detected wind wheel diameter; if the wind speed is smaller than or equal to a rated wind speed, carrying out maximum-power tracking control; and if the wind speed is larger than the rated wind speed, carrying out pitch control. Therefore, the wind power generator set is accurately controlled.

Description

technical field [0001] The present invention relates to the field of wind power generator control, in particular, to a control method and device for a wind power generator set. Background technique [0002] Because wind power has the advantages of environmental protection and energy saving, it has been widely used, and the control technology of wind turbines has also received more and more attention. During the operation of the wind turbine, the control of the wind turbine is mainly divided into two stages: when the output power of the generator is less than or equal to the rated power, the pitch angle remains unchanged at 0°, and there is no need to adjust the propeller at this time. The pitch angle, only the maximum power tracking control is required to make the wind rotor absorb the maximum possible energy. When the output power of the generator is greater than the rated power, the pitch angle should be adjusted according to the change of the output power, and the angle ...

AI Technical Summary

Problems solved by technology

However, due to the blocking effect of the wind wheel and the disturbance of the airflow, the anemometer cannot obtain accurate wind speed, and thus cannot achieve accurate maximum power tracking control

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