Control method of a grid side converter of a wind turbine and suitable system for it

摘要

Control method of a mainside converter (602) of a wind turbine (100), in which an output of the mainside converter (602) is connected or connectable through an electrical line (604) to an input (608) of a network transformer (640), comprising: calculating the volts-sec of a converter (φc) that take place at the output of the network side converter (602) based on a converter voltage ( uc) which takes place at the output (606) of the network side converter (602); determine an error in volt-sec (Δφc) between the determined volt-sec of converter (φc) and a reference in volt-sec of converter (φpc *), in which the reference in volt-sec of converter is determined based on an active power reference (p *), a reactive power reference (q *), a line current (ig) and a line voltage (ug) that take place at the input (608) of the network transformer (640 ); Check, based on the error in determined volt-sec (Δφc), the network side converter (602) so that the error in volt-sec (Δφc) is partially or totally compensated.