METHOD FOR SUPPRESSING LOW-ORDER CURRENT HARMONICS OF FOUR-QUADRANT CONVERTER OF ELECTRIC LOCOMOTIVE

摘要

The present invention relates to the field of control, and in particular, to a control algorithm for suppressing the current harmonics of a four-quadrant converter, specifically, a method for suppressing the low-order current harmonics of the four-quadrant converter of an electric locomotive. The method is a harmonic suppression method integrated in a four-quadrant control algorithm, solves the problem of the impact of the low-order current harmonics of a four-quadrant converter on the control of the converter and the pollution of the power quality of a power grid, and solves the problem of the impact of filtration of low-order harmonics by means of software filters. The method is mainly to add harmonic extraction and suppression functions to a four-quadrant converter control algorithm, without using additional hardware control circuit and device, has high adaptability and flexibility, can achieve the purpose of harmonic suppression, and also reduces design costs.