SEMI-DIRECT DRIVE DIRECT-CURRENT WIND TURBINE GENERATOR UNIT, AND CONTROL METHOD AND DEVICE THEREFOR

摘要

The present invention provides a semi-direct drive direct-current wind turbine generator unit, and a control method and device therefor. The control method comprises: determining a reference output voltage of a reactive compensation apparatus when the semi-direct drive direct-current wind turbine generator unit operates in a maximum power point tracking (MPPT) mode; and controlling an output voltage of the reactive compensation apparatus by using the determined reference output voltage of the reactive compensation apparatus as a target to regulate a voltage at a connection point, wherein a generator of the semi-direct drive direct-current wind turbine generator unit has an input end connected to a gearbox, and an output end respectively connected to a primary side of a machine-side transformer and the reactive compensation apparatus by means of the connection point; and a secondary side of the machine-side transformer is connected to an output end of the semi-direct drive direct-current wind turbine generator unit by means of a rectifier and a high-voltage switch apparatus in sequence.