WIND-POWER-PLANT CONTROL UPON LOW-VOLTAGE GRID FAULTS

摘要

A wind power plant connected to an electric grid. A central plant controller is configured to carry out a method of controlling an electric output of the wind power plant in the event of a transient low-voltage fault of the electric grid. The central plant controller is configured, after a fault stage in response to detection of a low-voltage fault during which the wind turbines ride through the grid fault, to control the wind power plant during a post-fault-support stage to provide only real power, or perform voltage control. The central plant controller is configured to resume control of the wind power plant according to the nominal-grid operation mode, which prevailed before the low-voltage fault, in a nominal-grid operation stage.