ADDITION OF A THIRD HARMONIC COMPONENT TO A BASIC REFERENCE WAVEFORM

摘要

The invention concerns a method, control device and computer program product for controlling a cell based voltage source converter using a basic reference waveform to which at least one odd harmonic component has been added. The invention also concerns such a voltage source converter. The control device (12) includes an adjustment factor determining unit (14) that determines an adjustment factor (d) for at least one harmonic component to be added to the basic reference waveform based on operational data ( Û v , ?1 , N, Cc , P, formula I) of the voltage source converter, and a control unit (18) that determines the at least one odd harmonic component, adds the odd harmonic component to the basic reference waveform shifted in phase with the adjustment factor and controls (CTRL) the voltage source converter using the basic reference waveform with added harmonic component.